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Expert Answers about Radiator Fans


  • Do Mechanical Radiator Fans Require Shrouds
  • Haven't had any issues with the Derale Fan part # D17313 that you referenced. You will want a shroud though otherwise it won't pull enough air through the radiator. When I had a vehicle that had a mechanical fan not having the fan close enough to the shroud caused the vehicle to overheat. Failure to have a shroud all together will cause the vehicle to overheat at a stop. We do not sell shrouds for use with mechanical fans, but you would need to have a shroud on your vehicle that is designed...
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  • Recommendation of Electric Fan for 1988 Ford Ranger With 2.9L Engine
  • When choosing an electric fan for your vehicle you will want to make sure to get a fan that will give you the correct Cubic Feet per Minute (CFM) for the size of your engine. The CFM is how much air is being moved through your radiator in one minute. The typical CFM requirement for a 6 cylinder engine is 1,600 to 2,000. If your 1995 Ford Ranger is used for towing you will want additional airflow. It is always recommended to go with the highest rated fan. I am including a link to a FAQ...
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  • Replacement Race Fan For A 1985 Chevrolet C/K Series Pickup
  • When it comes to installing The Derale 20 inch Rigid, Steel-Blade Race Fan - Belt Driven - 8,000 RPM # D17320 on your 1985 Chevrolet C/K Series Pickup will work if the mounting hole space on your original fan is between 1-3/4 inches to 2-1/4 inches, and has a pilot hole of 5/8 inches. If yours measures out to be different please reach back out and I can try and find something that will work.
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  • Radiator Fan For 1998 Dodge Durango
  • Since fans are not vehicle specific, choosing a fan for your 1998 Dodge Durango will depend on a couple of things. For your 5.9 liter engine, the normal CFM requirement is between 3400 and 4500, so you will want to get the largest fan possible that meets your engine cooling requirement. You will want to make certain you have sufficient room to install the fan. I have linked you to our product page that has several fans, and also shows the dimensions for the fans. I have also linked...
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  • Electric Fan and Shroud Recommendation for a 1952 Chevy 3100 Truck
  • I think your best option would be the Derale 17 inch High-Output, Electric Radiator Fan w/ Aluminum Shroud # D16816. You will want to check the dimensions to be sure that this will fit behind your radiator, but it has the same size fan as the # D18217 that you referenced plus a shroud.
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  • Recommended Electric Fan For 26.5 Inch By 18 Inch Radiator Core
  • For your 1972 Dodge B300 Sportsman Motorhome, I recommend the Derale 17" High-Output, Electric, Single Radiator Fan - 2,400 CFM # D18217. When it comes to cooling your radiator, the bigger the better, and this is the largest fan we carry. This will be a great fit for your 26.5 inch by 18 inch radiator core. The overall dimensions are 16-7/8" wide x 16-7/8" tall x 2-5/8" deep. Another great option is the Flex-a-lite Dual 11" Electric Radiator Fans w/ Shroud - Adjustable Thermostat...
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  • Will Electric Fans be Effective for 2002 Dodge Ram
  • An electric fan will absolutely be able to keep up and is going to be a really good benefit for when you are towing with your 2002 Dodge Ram 2500. You will want to get one that has a solid cubic feet per minute (CFM), and I recommend the Derale 16" Dyno-Cool Curved-Blade Electric Fan - 1,980 CFM # D18916. This is the best option because it is a great value, providing you with plenty of cooling power for the price. It can be used as a pusher or puller and you just need to make sure you...
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  • Powered Fan Shroud Recommendation for a 1956 Chevy Truck 454 Big Block
  • If you can fit the Derale 26" Dual High-Output, Electric Radiator Fan-and-Shroud Assembly # D16927 on your 1956 Chevy Truck it would work well and would help keep your engine temps down significantly. This fan can flow 4,000 cfm which would be a considerably higher amount than what you current flex fan is pulling. You will also free up a bit of horsepower by going with an electric fan as well. I attached a dimension picture for this fan setup for you to compare to your available space...
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  • Does Flex A Lite Radiator Fan # FLX180 Fit 2002 Chrysler Prowler
  • Flex A Lite test fit the fan part # FLX180 that you referenced and found that it fit and worked well in a 2002 Chrysler Prowler like yours. This is a single speed fan though that moves 3,300 CFM when on.
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  • Will Flex A Lite Radiator Fan # FLX293 Fit a 2003 Jeep Wrangler
  • The Flex A Lite Radiator fan setup part # FLX293 doesn't have specific fit information so you would need to compare it's dimensions to your radiator and available space for a fan. This fan setup is 31-7/8" wide x 17" tall x 4-1/2" deep. If you have room for it, and it matches closely to your radiator it would be a great setup.
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  • What is RPM Limit of Flex-a-lite 18" Clutch Fan # FLX6718
  • If you can keep the RPM under 4,000 the Flex-a-lite 18" Clutch Fan # FLX6718 is going to work well. If you exceed that you may have problems with it as well as problems with the engine! I doubt it would come flying apart but the fan blades may end up flattening out to the point they wouldn't be as effective.
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  • Does the Derale 26" Dual Electric Radiator Fan Assembly # D16927 Come with Wiring and Relays
  • The Derale 26" Dual High-Output, Electric Radiator Fan-and-Shroud Assembly # D16927 actually comes with wiring and relays needed to install it. If you wanted to add more wiring I'd use 10 gauge wire but in reality it should be fine with what comes with it.
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  • Can I Use the Flex-a-Lite Fan # FLX284 While Towing on My 2004 Chevy Silverado?
  • Yes, the Flex-a-lite Direct Fan Dual Electric Radiator Fan with Shroud # FLX284 can be used for towing applications on your 2004 Chevy Silverado with the 6.6L V8 diesel engine. Unfortunately, this fan (and all other fans) does not change the maximum weight capacity rating of your vehicle any higher than the stock setup. This is because the maximum weight rating is determined by structural/engineering factors outside of engine temp/horsepower factors. However, the # FLX284 has the ability...
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  • Recommended Electric Cooling Fan for 1970 Ford Mustang with Cleveland 351 Engine
  • The Flex-a-lite 15" Black Magic # FLX160 is the best available cooling fan we've got that would fit on your 1970 Ford Mustang. This fan provides up to 3000 cfm of air movement and can be used as a pusher or a puller fan to help cool down your engine, and because it's not belt driven it will doesn't rely on engine RPMS to provide maximum cooling. I've linked a short video on this fan for you to have a look at.
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  • Does the Flex-a-lite 16" Flex Fan Come In Reverse Rotation
  • Yes, the Flex-a-lite 16" Flex Fan # FLX2016 is also available with reverse rotation. The fan you are looking for is the # FLX2216.
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  • Can Flex a Lite Fan FLX236 Install on Vehicle that Had Manual Fan
  • Yes you can install the Flex a Lite fan # FLX236 on a 1989 Toyota Pickup but you'll also need a wiring kit/thermostat part # FLX31149 and you'd be set.
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  • How to Determine if Derale 12 Dyno-Cool Curved-Blade Electric Fan Will Fit
  • The only way to determine if the Derale 12" Dyno-Cool Curved-Blade Electric Fan # D18912 will fit your 2007 Chevy Avalanche is to take some measurements; we don't have the dimensions needed to verify. You can use the attached diagram to see if you have the room to mount the fan; it is overall 13" wide x 12-1/8" tall x 2-3/8" deep. I have added a link to the installation instructions for you to check out as well of the Derale 12" Dyno-Cool Curved-Blade Electric Fan # D18912.
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  • Does Power Steering Reservoir Relocate When Installing Derale Performance Electric Fan Kit For Jeep
  • The power steering reservoir of your 2000 Jeep Wrangler 4-cylinder does get relocated when installing the Derale Performance Electric Fan Kit for 1987-2006 Jeep Wrangler # D20161 that you referenced. This is covered in the attached installation instructions and the kit comes with everything needed to cover this. I attached a picture I took from the install instructions too that covers what you'll need to do as well plus a link to an install video.
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  • 1994 Chevrolet K1599 5.7L Electric Fan Conversion Recommendation
  • Electric fans do improve fuel mileage and power since they allow the accessory belt drive to turn with less resistance. I did the same conversion on an older Camaro years ago and it cooled better, improved mileage, and power. You'll have to measure your current shroud to determine what the best fan setup would be. The Flex-a-lite 15" Black Magic Xtreme Electric Radiator Fan with Shroud # FLX180 measures 21-1/2" wide x 17-1/2" tall x 4-3/16" deep and can pull 3,300 CFM so it would be a great...
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  • Can Derale Tornado Electric Fan be Used in Front of Transmission Cooler
  • Yes, you can technically install the Derale 9" Tornado Electric Fan # D16509 in front of the transmission cooler of your 2011 GMC Yukon XL but it may be that you are getting diminishing returns. This fan is unique in that it can be used as a pusher or puller application so I recommend instead that you install this fan behind the radiator which is going to maximize your cooling efficiency.
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  • Replacement Radiator Fan For 1966 Oldsmobile 442 To Help With Overheating on Highway
  • If your existing fan rotates counter clockwise you need a reverse rotation fan. The general rule is if your vehicle has a "V" belt it is standard rotation. If your vehicle has a serpentine belt it is counter clock wise or reverse. You could use the Derale 18" Rigid, Steel-Blade Race Fan - Belt Driven part # D17418 to replace your current fan. It is the diameter of the fan and the RPM, not so much the depth that would make the difference. However, I recommend to add an electric radiator...
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  • How are the Fan Blades of the Derale 18 inch Rigid, Steel-Blade Race Fan, part # D17318 Made
  • I spoke with my contact at Derale and he informed me that the steel blades of the Derale 18 inch Rigid, Steel-Blade Race Fan - Belt Driven - 8,000 RPM, part # D17318, are made from stamped steel. If you wanted a fan that features stainless steel blades, and flattens out when sufficient airflow is present, therefore increasing fuel mileage and power I would recommend a Derale 18 inch Heavy-Duty, Stainless Steel Flex Fan, part # D17018.
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  • Flex-a-lite Electric Fan with Variable Speed Controller for a 2007 Ford F-150
  • The first thing you will want to check is if there is space where you want to put the Flex-a-lite Dual 15" S-Blade Electric Radiator Fans with Shroud Assembly - 6,000 CFM Item # FLX293. This model is 31-7/8" wide x 17" tall x 4-1/2" deep overall so as long as you have space for this fan it can be installed. Space is probably the biggest issue. Everything else will be pretty easy. You should not have to buy anything else. It is possible that, if something is in the way of an otherwise...
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  • Will the Derale 15 Inch Heavy Duty Belt Driven Fan 17215 Fit a 1973 Cutlass
  • The Derale 15" Heavy-Duty, Stainless Steel Flex Fan, Chrome Hub - Belt Driven # D17215 is designed to be a universal replacement for a variety of vehicles, so you'll just need to know the size of your current fan to determine if this will fit. As long as you've got a 15" diameter belt driven fan on your 1973 Cutlass with the 5.7L engine then this will work for you. If you find that you've got a different size belt driven fan on your Cutlass just let me know and I can help you locate...
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  • Do Electric Radiator Fans Have to be Mounted Directly Against the Radiator, 1982 Chevy Monte Carlo
  • For the best performance, a radiator fan like Derale 12 Inch High-Output, Electric Radiator Fan, # D16925, should be mounted directly against the radiator. If there is a gap, less airflow will go through the radiator and it will not be as efficient. If you do not want to use the included mounting straps, I would find another way to mount it directly against the radiator for ideal performance. I have included a link to our FAQ article on electric fans for reference.
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  • Can Electric Radiator Fan Replace Factory Unit on 2005 Chevy Express Van
  • If you have the space available, you should be able to replace the factory belt-driven fan on your Chevy Express 3500 with an electric fan like the Derale 32 Inch Dual Tornado # D16834. This particular model fan can be mounted on either side of the radiator, as a pusher or a puller. Its overall dimensions are 31-3/4 inches wide, 15-5/8 inches tall, and 3-1/4 inches deep. Because a belt-driven fan will use up power from the engine to turn, an electric fan will be an improvement with...
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  • Can the Derale Electric Paddle Blade Radiator Fan # D16104 Provide Airflow in Either Direction
  • The Derale 4 inch High-Output Extreme Paddle Blade Electric Fan, # D16104, is designed for puller applications only, so the fan must be mounted on the inboard side of the radiator to pull cooler outside air into the engine compartment and over the radiator. The smallest reversible air flow fan that we carry at this time is the Derale 7 inch Tornado Electric Fan, item # D16617. This fan can be installed as a pusher fan on the forward side of the radiator or as a puller fan on the inboard...
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  • How To Increase Cooling Power for a 1999 Dodge Dakota R/T
  • I do have a way to help cool down your 1999 Dodge Dakota R/T but the 5/8" pilot hole of the Derale 18" Rigid, Aluminum-Blade Race Fan - Belt Driven part # D17518 will be much too small to work with the factory fan clutch. Instead, I recommend first removing the factory clutch fan and installing the Derale 12" High-Output, Electric Radiator Fan part # D16925. This radiator fan will attach directly to your vehicle's radiator and will provide up to 2,150 CFM which will be more than sufficient...
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  • Transmission Cooler Fan Recommendation to Give Additional Airflow for Plow Truck
  • Yes, installing the Derale 7" Tornado Electric Fan # D16507 in front of your transmission cooler will give you additional cooling power for when you are at highway speeds and your plow is blocking airflow.
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  • Derale Fan and Shroud Assembly Compatible with 2010 Chevy 2500HD with 6.0L
  • I can't confirm a fit on your 2010 Chevy 2500 HD 6.0L with the Derale 29" High-Output, Electric Radiator Fan-and-Shroud Assembly - 4,000 CFM # D16928, but some simple measurements will confirm whether it will fit or not. This unit measures 28-5/8" Wide x 13-7/8" tall x 3-1/2" deep. The mounting dimensions are 25-5/8" wide x 11-3/8" tall x 1-1/2" deep. If this won't fit, you may want to consider the Derale 26" Dual High-Output, Electric Radiator Fan-and-Shroud Assembly - 4,000 CFM...
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  • How to Activate Derale 14 Inch High-Output, Electric, Single Radiator Fan
  • Good question; to activate the Derale 14" High-Output, Electric, Single Radiator Fan - 2,100 CFM # D18214 you can use either a manual switch or a thermostatic fan control, both of which we do have. The switch will allow you to simply turn the fan on or off when you deem appropriate, while the thermostatic control engages at its determined temperature, which in the case of this fan and control is 180 degrees. - Switch: Derale Lighted On/Off Switch for Electric Fans # D16740 - Thermostat...
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  • What Is the Diameter of the Center Hole on the Derale Radiator Fan # D19113
  • I contacted our representative at Derale about the Derale Radiator Fan # D19113. He informed me that the diameter of the center hole measures 5/8 inches. The overall height of the fan is 13-3/8 inches, and is 1-1/8 inches thick. I have linked an FAQ on radiator fans that you may find as a good reference.
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  • RPM Rotational Speed Rating for Derale 18-Inch Fan Clutch Fan with Reverse Rotation # D17918
  • My contact at Derale confirmed that their 18-Inch Fan Clutch Fan with Reverse Rotation # D17918 is rated for rotational speeds up to 8000-rpm.
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  • Fit of Derale # D16826 Electric Fan on 2007 Nissan Armada
  • The Derale Dual High-Output Electric Radiator fan you mentioned, part # D16826 is not a vehicle specific item. It will work with your vehicle if there's enough room to accommodate its 25-5/8 inches long x 17-1/8 inches tall x 3-1/2 inches deep size. A fan control thermostat like part # D16788 would also be needed.
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  • Higher Output Radiator Fan that Can Fit 1991 Ford Mustang
  • I'd measure to make sure but the Derale part # D16825 that you referenced is very close to the dimensions you listed as it measures 25-5/8" wide x 15-1/8" tall x 4" deep. If you can fit the extra width of 1-5/8 inches and depth of 1/2 inch this would work great. For something a little less wide we have the part # D66833 which is 24" Wide x 17" tall x 4-1/2" deep
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  • How Does the Derale 26" Dual High-Output, Electric Radiator Fan-and-Shroud Assembly Attach
  • The Derale 26" Dual High-Output, Electric Radiator Fan-and-Shroud Assembly part # D16927 is designed to attach to an existing radiator flange which you can see in the attached photo below. It comes with the needed angled brackets for this as well as everything else you will need for installation.
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  • Does Derale 19" Heavy-Duty, Stainless Steel Flex Fan Need A Fan Clutch
  • The Derale 19" Heavy-Duty, Stainless Steel Flex Fan, Black Hub - Belt Driven - 10,000 RPM, part # D17019, is designed to work without a fan clutch. You will need a fan spacer, this takes up the space where the clutch used to be, to correctly position it in the fan shroud. The spacer that works with this Derale fan is the Derale Fan Spacer Kit for Belt-Driven Fans - 1-1/2", part # D31515. I have included a product description link for you below.
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  • Will Derale 16-Inch Dyno-Cool Electric Radiator Fan, Part # D18916, Fit 2003 Chevrolet Silverado
  • Aftermarket products such as the Derale Dyno-Cool Radiator Fan, part # D18916, and their oil and transmission coolers also, are not vehicle-specific. Any given product can be installed in any vehicle where there is ample space for mounting it. To determine if this fan will fit your 2003 Silverado you can measure the space in front of (or behind your radiator since this fan can pull or push air) to see if there is enough space to mount it. The Derale Dyno-Cool is 3-5/8-inches thick at...
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  • Will Dual or Single Radiator Fan Provide Better Cooling
  • A dual-fan 4,000 CFM set-up would move more air over a larger portion of the radiator than a single 3,600 CFM fan would. The dual-fan set-up would be my recommendation.
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  • Recommended Dual Electric Radiator Fan w/ Shroud for 1967 Chevy Chavelle
  • For your 1967 Chevelle I recommend taking a look at the Derale 26" Dual High-Output Electric Radiator Fan # D16842. This is a dual electric fan measures 26 inches wide, 18 inches tall, and 2-3/4 inches deep. It is . It has a 4,000 cubic feet per minute rating. In terms of depth this is the lowest profile dual fan unit with shroud that we have available. As long as you have the needed space on the vehicle to mount this unit, this will work great.
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  • Will the High-Output, Dual Electric Radiator Fan Assembly 4,000 CFM # D16934 Fit on a 1985 Ford
  • The Derale 32 inch High-Output, Electric Radiator Fan-and-Shroud Assembly - 4,000 CFM, item # D16934, is designed as a universal application and will mount behind the radiator on your 1985 Ford with 6.9 Liter diesel engine. You will need to measure to be sure there is room to mount the assembly behind the radiator. I have listed the dimensions below. Width - 31-3/8 inches Height - 15-3/4 inches Overall Depth - 3-1/4 inches Mounting Holes - 12-7/8 inches Top to Bottom Mounting...
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  • Electric Fan and Shroud Kit for 1999 Dodge Durango
  • I looked up your radiator core dimensions and they are 23-1/4 by 22 inch so for a shroud and fan setup that would work well we have the Derale Dual Fan Shroud part # D66830 which matches the dimensions of your radiator well and can pull 3,750 CFM which will do a great job keeping your coolant cool. This also comes with a thermostat and a variable speed controller so that you can cool the radiator perfectly.
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  • Thermostat and Probe for a High-Output, Electric Radiator Fan-and-Shroud Assembly, # D16934
  • Because the High-Output, Electric Radiator Fan-and-Shroud Assembly, # D16934, contains two fans that operate independent of one another, you will need two Adjustable Fan-Control Thermostats with Thread-In Probes, # D16749. The wiring that comes with the thermostat is required and each fan will need a complete D16749 to make them operable. The only extra wiring that might be needed is if the mounting locations for the thermostat and/or probe are too far away. In that case, extra wiring...
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  • Will 26 Inch Derale Dual Electric Radiator Fan Fit 1995 Jeep Grand Cherokee
  • The installation kits that come with Derail Electric Dual Radiator Fans like # D16927, are pretty universal in that they are designed to be compatible with as many vehicles as possible. I am confident that this fan will fit your 1995 Jeep Grand Cherokee. The brackets that come with the fan are designed to attach directly to the radiator, so you will need to make sure there is space enough for the fan. The dimensions are as follows: Overall dimensions: 27" wide x 18" tall x 3-3/4"...
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  • Recommended Electric Radiator Pusher Fan for 24 Volt System
  • The Flex-a-lite Dual 15" Electric Fans with Shroud part # FLX35024 can be used as a pusher fan and is compatible with 24 volt electrical systems so this is what I recommend that you use. That said, most of the electric radiator fans operate on 12 volt electrical systems so you will have to spend a bit more for a system compatible with a 24 volt electrical system. The above Flex-a-lite Dual Fan measures 31-7/8" wide x 17" tall x 4-1/2" deep and it comes with all of the switches and relays...
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  • How to Tell if Flex-a-lite 16" Flex-Wave Electric Fan Will Fit Factory Shroud on 1993 Chevy Suburban
  • The Flex-a-lite 16" Flex-Wave Electric Fan # FLX236 measures 16" wide x 16-1/2" tall x 3-3/4" deep so you'll use these dimensions to see if it will fit where you're wanting to install it. We don't have specifics when it comes to mounting since these are more or less universal so it really just depends on the room that you have.
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  • Comparing CFM Output of Stock Electric Fan in 2011 Ford Escape V6 and Flex-a-lite Electric Fans
  • I did a little research and it looks like the stock fan in a 2011 Ford Escape is 500 to 650 cubic feet per minute. Flex-a-lite fan # FLX412 puts out 2,500 cubic feet per minute but draws much more power, 22 amps. The electric fans we sell are universal items so you have to go by the dimensions of the item and compare that to the available space in the vehicle's engine compartment. Keep in mind this is a puller fan meaning that it goes between the radiator and motor and pulls air through...
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  • Using Derale Electric Fan Part # D16908 for Remotely Mounted Transmission Cooler
  • At 450 CFM (cubic feet per minute) the Straight Blade Electric Fan you mentioned, part # D16908, would provide plenty of airflow for the D13503 Transmission cooler. This has been confirmed with Derale, the manufacturer. If you need a thermostat control for the fan, use part # D16769.
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  • Cooling Options For Chevy Express 3500 When Towing a 30 Foot Travel Trailer
  • Since you have already added an aftermarket transmission cooler to your Chevy Express 3500, you can make sure you have it mounted in the most efficient location for cooling. The ideal place to mount an aftermarket transmission cooler is behind the front grille but in front of the radiator of your vehicle. Adding an electric fan like the item you selected, Derale Radiator Fans, part # D16834, will help reduce engine temperatures and would be a good option. You will need to measure to...
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  • Locating Correctly Rated Electric Fan to Cool Engine on 1986 Chevy P30 Chassis
  • We do have a large selection of electric radiator assemblies available, such as the excellent Derale 26" Dual High-Output # D16842 that you were looking at, but the exact CFM requirements to cool the engine in your 1986 Chevy P30 is going to be difficult to pin point. This is because the requirements will be different among vehicle manufacturers and will vary depending on your particular application (towing, long distance trips, outside temperature, etc). The Derale # D16842 has a high...
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  • Can you Sandwich Cooling Fans Between Coolers
  • As long as the Flex-a-lite Dual 15" S-Blade Electric Radiator Fans with Shroud Assembly part # FLX293 was mounted in front of the radiator and transmission cooler in a way that pulled air through the fan into the coolers than you would not need to remove the factory clutch and radiator fans as both the factory cooling fans are set to pull air into the coolers. However, if the Flex-a-lite Dual 15" S-Blade Electric Radiator Fan was mounted in front of the radiator and transmission coolers...
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  • 17 Inch Radiator Fan That Can be Used as Pusher
  • Although the Derale 17" High-Output, Electric Radiator Fan-and-Shroud Assembly - 2,400 CFM # D16919 is only designed to work as a puller application (behind the radiator) we do have an option for you. The Derale 17" High-Output, Electric, Single Radiator Fan - 2,400 CFM # D16217 will work great as a puller or a pusher application (in front of the radiator) like you were wanting. It is worth mentioning that typically fans do work more efficiently as a puller than a pusher. I have...
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  • Options for a 17 inch Pusher Electric Radiator Fan
  • Derale 17 inch electric fans # D16217 and # D18217 can be used as pusher or puller fans. They can be mounted on either side of the radiator, as a pusher or puller, without having to flip blades or switch motor leads. This isn't a 17 inch version pusher that has the shroud. I have also included a link to our help article on electric radiator fans for you.
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  • Heavy-Duty Fan For 1978 Chevy Camaro
  • The heaviest-duty fan that might work for you is one that moves 6,000 CFM of air: - Flex-a-lite Dual 15" S-Blade Electric Radiator Fans with Shroud Assembly - 6,000 CFM # FLX293 This is a universal fit so you just need to make sure you have the room, as it measures overall 31-7/8" wide x 17" tall x 4-1/2" deep.
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  • How to Wire the Derale 26 Dual Electric Radiator Fan Part # D16927 to a Manual Switch
  • In order to wire the Derale 26" Dual High-Output, Electric Radiator Fan-and-Shroud Assembly part # D16927 to a manual switch you will need two of the Derale Lighted On/Off Switch for Electric Fans part # D16740. There are three terminals on the switch which are for accessory, power, and ground. The accessory terminal will need to be attached to the yellow wire on the included relay harness. The power terminal will need to be attached directly to the positive battery post and the ground...
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  • What Powers Derale Electric Radiator Fan and Shroud
  • The alternator and 12 volt power system of the vehicle is what provides the power for the Derale Fan and Shroud Assembly part # D16934. That said, these do not put any additional strain or load on the alternator as it's already turning and providing power for the battery. This is how it frees up power over a manual fan.
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  • Is Flex-a-lite Direct Fit LoBoy Fan a Pusher or Puller?
  • The Flex-a-lite Direct Fit LoBoy Electric Radiator Fan - 2,500 CFM # FLX328 is a puller fan without controls. If you want thermostat controls you will use # FLX318 which is the same puller fan but with the addition of the controls.
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  • Recommendations to Help Prevent a 1965 Lincoln Continental From Overheating at Idle
  • Going to a larger aluminum radiator will drastically help your 1965 Lincoln Continental stay cool. If you wanted to try a different fan setup I would recommend you get rid of the mechanical fan you have that pulls air through the radiator and go with an electric fan setup with a shroud like the # D16826. This will pull a ton more air through your radiator than a mechanical fan at idle so it should work very well for you. Fans that pull air through the radiator are much more efficient...
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  • Is Derale Radiator Fan # D16908 a Pusher or Puller and Can it be Used on a Motorcycle
  • The Derale Radiator Fan, # D16908, can be used as a pusher or a puller fan, depending on where it is mounted. The motor is reversible. You could use it on a motorcycle, provided that it fits in the space you have available on the bike. The dimensions of the fan are 8-1/8 inches wide x 8 inches tall x 2-1/4 inches deep. You will also need to make sure the bike has an electrical system capable of supporting the 5.3 amp power draw of the fan. I have included a couple of FAQ articles below...
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  • How to Determine if Derale 17 Inch Fan Clutch Fan Fits 1988 Ford Ranger
  • The Derale 17" Fan Clutch Fan # D17117 is a universal part and not a specific fit for any vehicle, including your 1988 Ford Ranger, so in order to determine if it will fit you will need to measure your fan. If it is 17 inches in diameter - or you have the space to add a fan that is 17 inches in diameter - then you can use the Derale 17" Fan Clutch Fan # D17117.
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  • High CFM Electric Fan for 1999 Ford F-250 wit 5.4 liter V8
  • Your 1999 Ford F-250 has plenty of room for an electric fan with shroud like the Derale High-Output, Electric Radiator Fan-and-Shroud Assembly # D16928 which can move 4,000 CFM. The dimensions of this are 28-5/8" wide x 13-7/8" tall x 3-1/4" deep which should fit easily on your radiator, but if you wanted a more custom fit measure the radiator of your truck and let me know the size and I'll be able to get you one that matches up perfectly.
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  • Dual Electric Fans to Replace Mechanical Fan on a 2001 Ford F-150 with 4.6L V8 Engine
  • I cannot speak as to the requirements you will need to keep your 4.6L V8 engine cool after removing the mechanical fan but I can say that mechanical fans draw much more CFM than your average electric fan. The typical mechanical fan can draw anywhere from 3,000 to 5,000 CFM, therefore I can see a 3200 CFM electric fan as being a suitable replacement. I recommend taking a look at the Derale 24" Dual, High-Output Electric Radiator Fan w/ Aluminum Shroud part # D16831. This dual fan combo...
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  • Is Derale 12 Inch High-Output, Extreme Skewed-Blade Electric Fan Quiet
  • For your application I recommend going with the Derale 12" High-Output, Extreme Skewed-Blade Electric Fan - 2,000 CFM # D16924 that you asked about as it can be used as a pusher or a puller. I reached out to my contact at Derale who said that they don't test their fans for decibels but this fan is the quietest that they have.
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  • Recommendation for a 1997 Dodge Ram 3500 Diesel and Mounting a Derale 20 Rigid Belt Driven Fan
  • According to my contacts at Derale the 20 inch Rigid Steel Blade Race Fan # D17320 can not be mounted to a fan clutch, it is considered a rigid mounting system. This fan is considered a standard rotation, has a maximum rpm rating for up to 8,000 rpm. However, if you would like to consider a fan that will mount to your fan clutch, then you would need the # D17120. This style of fan would mount to your existing fan clutch, and would not need a spacer for mounting. It is also a standard...
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  • Electric Radiator Fans Compatible With 24 Volt Systems
  • I reached out to my contact at Derale, and all of the Derale products including the 17" High-Output, Electric Radiator Fan w/ Aluminum Shroud Assembly - 2,400 CFM # D16816, are only compatible with 12V. I do have another option for you. The closest fan we have to what you are looking for is the Flex-a-lite 16" Trimline Reversible Electric Radiator Fan - 24V # FLX11624. Although this is 1 inch smaller, it will work well with a 24V system. You may also be interested in the Mounting...
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  • Derale Fan and Shroud Recommendation for 1964 Chevrolet Truck w/ 327 Air and Automatic Transmission
  • When it comes to a fan and shroud assembly for your 1964 Chevrolet Truck, I recommend going with the Derale 26 Inch Dual High-Output, Electric Radiator Fan-and-Shroud Assembly, # D16927 for the powder-coated steel shroud and # D16842 for aluminum shroud. I have included the installation instructions for you.
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  • Fit of Derale # D12713 Heavy Duty Stainless Steef Flex Fan Fit a 1955 Chevy 235 6 Cylinder Engine
  • The Derale 13 inch diameter Heavy Duty Stainless Flex Fan you referred to, part # D17213 isn't a vehicle specific product. If the fan shroud has an opening slightly larger than 13 inches, the fan should work very well. If the shroud opening is quite a bit larger or smaller than that, for efficiency you'd want to choose a fan that's closer in size. If you click the provided link, you can see the various sizes of fans we offer.
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  • Electric Fan Kit Recommendation to Replace Slow Fan on 1999 GMC Jimmy
  • If your vehicle fan was operating properly you would not be able to stop the fan with your hand without injury. That's a sign that your fan has a problem. Without proper air flow through the radiator you will have overheating issues like you described. A great solution would be an electric fan kit like the Derale Dyno-Cool Fan with Thermostat # D16314. This will replace your current fan setup with an electric fan that comes with it's own thermostat which you can use to adjust when the...
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  • Recommendation of Electric Radiator Fan for a 1995 Ford Ranger with a 4 Cylinder Engine
  • When choosing an electric fan for your vehicle you will want to make sure to get a fan that will give you the correct Cubic Feet per Minute (CFM) for the size of your engine. The CFM is how much air is being moved through your radiator in one minute. The typical CFM requirement for a 4 cylinder engine is 1,200 to 1,600. If your 1995 Ford Ranger is used for towing you will want additional airflow. It is always recommended to go with the highest rated fan. I am including a link to a FAQ...
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  • Is Derale Dual Electric Radiator Fan A Variable Speed
  • The Derale Dual High-Output, Electric Radiator Fan, part # D16825, is a single speed system and both fans operate at the same time. There are options available for control of the fans you may be interested in. The first is to use a switch like the Derale Lighted On/Off Switch, part # D16740. This switch is a simple toggle switch that allows you to easily turn your fans on or off. If you wish to install an automatic system, I recommend part # D16789. This will turn the fan on or...
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  • How Does Derale Tornado Electric Fan D16617 Get Operating Power
  • The Derale Tornado Electric Fan # D16617 has a built-in 12V electric motor to power it. The motor will draw 4.8-amps of current at 12-volts from the vehicle battery. This fan will not use engine power to function the way belt-driven fans do. In addition, you do not have to worry about an electric fan's slowing down at low RPM, as many belt-driven fans do, so you are guaranteed sufficient airflow regardless of the vehicle speed.
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  • Electric Fan Shroud Setup Recommendation for a 1970 Chevy Nova with a Big Block
  • Yes, the Derale 26" Dual High-Output, Electric Radiator Fan-and-Shroud Assembly # D16927 would work perfectly for you since it is 18 inches tall and 26 inches in width. This setup can flow 4,000 CFM which is perfect for a big block Chevy engine.
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  • Pilot Hole Size on Derale 20" Rigid, Steel-Blade Race Fan
  • The pilot hole on the Derale 20" Rigid, Steel-Blade Race Fan part # D17420 is 5/8" and the mounting flange pattern is 1-3/4" - 2-1/4" square.
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  • 4,000 CFM Radiator Fan and Shroud Recommendation for Trans Am with LS3 Engine
  • The Derale 25-5/8" Dual High-Output, Electric Radiator Fan w/ Aluminum Shroud and Vents # D16826 would be a great choice for a fan setup for your 2001 Pontiac Trans Am with a LS3 engine. For a thermostatic controller for the fan setup you would want the # D16788. This setup will flow 4,000 CFM which should do well to cool your modified LS3 engine that I am jealous of. I have a heads/cam LS1 in my 1998 Trans Am, but few engines have the potential as the LS3.
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  • Fan Recommendation for a 1979 Ford F150 with a 460 Cubic Inch Engine
  • As long as you have the clearance, the Derale Radiator Fans # D16826 that you referenced would be a good choice for your 1979 Ford with a 460 cubic inch motor. This unit can pull up to 4,000 cfm and should work well for cooling your vehicle. I attached a picture that shows the dimensions of this setup for you to compare with the size of your radiator. You might also be interested in purchasing a Derale Dual-Fan Adjustable Fan-Control Thermostat # D16789 to allow you to select when...
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  • Actual Fan Diameter of Derale High Output Electric Radiator Fan # 16919
  • According to our friends at Derale, the fan itself is 17 inches in diameter.
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  • Does The Derale 16 Inch Tornado Electric Fan # D16516 Include a Thermostatic Control
  • You will be able to add a thermostatic control to the Derale 16 Inch Tornado Electric Fan # D16516, but it does not come included. I would recommend the Derale Thermostat Fan Control, part # D16735, which will turn the fan on at 180 degrees. This thermostat kit will work with the Derale Tornado Electric Fan # D16516. This Derale Fan is rated at 2,175 Cubic Feet Per Minute (CFM), and would be good for a 4 or 6 cylinder motor. I have linked an FAQ on electric fans that includes a chart...
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  • What Type of Plug is on Derale Extreme Paddle Blade Electric Fan # D16104
  • The plug on the Derale 4" High-Output Extreme Paddle Blade Electric Fan - 125 CFM # D16104 is a Yazaki 7122-2125 (or equivalent) and the pins are a Yazaki 7114-2020 (or equivalent), according to my contact at Derale.
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  • Derale 12 inch High-Output, Electric Radiator Fan # D16925 Recommendation
  • I spoke with my contact at Derale and he informed me that a Derale 12 inch High-Output, Electric, Single Radiator Fan # D16925 can withstand air temperatures of up to 300 degrees and is 12 inches in diameter. Based on everything you need I think this # D16925 would be the best choice we could offer you. I attached a couple FAQs on radiator fans for you to check out also.
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  • Electric Fan with Shroud Availability for Chevy Truck with 454 Big Block
  • The typical CFM requirement for a big block vehicle like your 454 truck for a fan is 3,500 to 4,500 lbs. The part # D16934 can pull 4,000 CFM so it would fall within the range required. This is the highest rated electric fan system we offer so it would be the best option we have. As long as the dimensions of it match the available room you have and the radiator this would be a great option. This fan setup measures 31-3/8" Wide x 15-3/4" tall x 3-1/4" deep. Since you have 3-1/2 inches...
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  • Thin Replacement Dual 12" Puller Radiator Fan for a 1967 Chevy Chevelle SS
  • We have 3 different dual electric radiator fan options for you, but they measure 2-5/8" thick so it will be just over the 2.48" that you mentioned. Lo-Profile # FLX420 - Base Lo-Profile # FLX410 - With Controller Lo-Profile # FLX412 - With Thermostat All of these come with 12" fans and are rated for 2,500 CFM. We have some thinner single fan applications but the 2-5/8" thickness is about as small as you're going to find for a dual fan setup from what we have to offer.
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  • T-Fitting Spec of Derale Performance Electric Fan Kit for 1987-2006 Jeep Wrangler
  • The Aluminum Adapter Thermostat Switch Assembly - or T-Fitting for short - on the Derale Performance Electric Fan Kit for 1987-2006 Jeep Wrangler # D20161 is a 3/8" NPT fitting. If you go to about the 6:00 mark of the linked install video you can see this part being installed in a Jeep Wrangler. I have also added a link to the install instructions for you to check out.
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  • Will a Derale Electric Radiator Fan Fit a 2007 Nissan Armada
  • To determine if the Derale electric radiator fan # D16825 will fit your 2007 Nissan Armada, you have to look at its external dimensions and compare that to the available space in the engine compartment of your Armada. The fan is 25-5/8 inches wide, 15-1/8 inches tall, and 3-1/2 inches deep. In metric units it is 65 cm by 38-1/2 cm by 8.9 cm. This is a puller fan only meaning it has to be between the radiator and motor and pulls air through the radiator. You would not wire it directly...
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  • Will Transmission Cooler Interfere with Engine Cooling
  • A transmission cooler has plenty of gaps between the coils and fins that will allow air to easily pass through it. The transmission cooler will not interfere with the cooling process in any way. I have linked you to some FAQ articles that you might find helpful.
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  • Electric Radiator Fan Recommendations for a 2003 GMC Sonoma
  • Adding an electric fan or fans is subject to how much space you have in the engine compartment. The first thing I would check is if your 2003 Sonoma has a fan driven by a serpentine belt (a belt that turns the pulleys of several components) or if it has its own belt. If the fan is attached to the pulley for the water pump, you will not be able to remove it though the blades may be able to be removed. So if you find that your fan or blades can be removed and you can add an electric fan,...
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  • Recommended Electric Radiator Pusher Fan Assembly
  • I have a solution for you, but you're not going to be able to flip the # D17618 over and use it as a pusher fan because the curvature on the blades would come in contact with the radiator (or wherever you're mounting this). It sounds like you need a pusher fan blade- which we do not have available at this time, but you can get an entire pusher fan assembly like the # FLX119 which has a 16" blade and moves 2500 cfm.
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  • Is There a Custom Installation Kit Available For the Flex-a-lite 16 Flex-Wave Electric Fan
  • There is not a vehicle specific installation kit available for the Flex-a-lite Flex-Wave Electric Fan # FLX236 but it does install by mounting directly to your radiator core using nylon bolts and push nuts. This will be a great solution for your 2003 GMC Yukon XL when towing your camper and will work to keep you from overheating, especially if you tow a lot in areas with restricted air flow or at low speeds. If you want to have your fan turn off when the air conditioner is going you'll...
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  • Highest CFM Rated Electric Radiator Fan for 1964 Chevy C-10
  • I do have an option for you but the space you have available is not going to allow for the CFM requirements you are seeking. The best option I have that will fit into the space you have listed is the Derale 17" High-Output, Electric Radiator Fan part # D16821 which measures 20-3/4" wide x 17-5/8" tall x 3" deep and has a 2,400 CFM rating.
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  • Dual Electric Fans for 95 Jeep Grand Cherokee 5.3 V8
  • Dual fans have a few advantages of single fans. They cover a wider portion of the radiator so they can effectively cool more surface area that a single fan that moves the same amount of air, there is basically a back up fan if one would have an issue, and there is more fan speed variation allowed. The Derale part # D16927 that you referenced would fit your 1995 Jeep Grand Cherokee with a 5.2 liter V8 and would work great as it can move up to 4,000 CFM.
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  • Radiator Fan for 1966 Chevy Pickup Truck
  • For your 1966 Chevy Pickup I recommend taking a look at a smaller dual radiator fan like the Derale # D16812 that measures 23-3/4 inches wide, 11-1/2 inches tall, and 3 inches deep. This is going to match up much better to the mounting space you have available but its 2 high-powered electric fan assemblies will still do a great job of keeping the engine temperatures down when your truck is at a stop. Two high-amperage relay harnesses and all the necessary hardware is included. You...
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  • Can you Mount the Flex-a-Lite Flex-Wave Electric Fan and Keep your Clutch Fan
  • I spoke with Flex-a-Lite to check on this for you. The 16" Flex-Wave Electric Fan, part # FLX236, is a universal fit, so it will definitely work with your radiator by mounting to the core. To use this as a puller, you will need to mount it behind the radiator. As for keeping your clutch fan, Flex-a-Lite stated that you will need to measure your available space. There will need to be at least 1" between the clutch fan and this fan. Keep in mind that this fan is 3-3/4" deep, so make...
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  • Vehicle Battery Draining After Installation of Derale Dual High-Output Radiator Fan # D16927
  • The 85-amp alternator in your vehicle will deliver its full current output only at highway speeds when RPMs are high. In typical around-town driving it will deliver only a fraction of its rated current and only about 40 amps at idle. If you have other current-hungry electronics in your vehicle, for example a powerful audio amplifier and/or a CB radio system, then the combination of power draw from these items together with the Derale fan may be taxing your alternator. You certainly...
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  • Parts Needed to Mount Flex-a-lite Dual Electric Radiator Fans on 2003 Chevy TrailBlazer
  • To install the Flex-a-lite Dual 13-1/2" Electric Radiator Fans w/ Shroud # FLX295 on your 2003 Chevy TrailBlazer you'll need the Mounting Bracket for 2000-2004 Chevy & GMC # FLX29201. This comes with the brackets and hardware needed to fit this directly to a 28-1/4" wide radiator core like what you should have on your TrailBlazer.
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  • Is Flex-a-Lite Radiator Fan Made in USA
  • Yes Flex-a-Lite fans like the # FLX116 are made in the USA.
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  • Dual Fan Setup that Can Move 3,750 CFM that is 24 inch by 17 inch
  • We have a dual fan setup that is VERY close to what you are looking for but is 1 inch deeper than what you mentioned with the part # D16833. This is rated for 3,750 CFM, is 24 inches wide, 17 inches tall, and 4-1/2 inches deep. If the depth is an issue you could maybe look into relocating your radiator to accommodate it. Otherwise we aren't aware of anything similar that is 3-1/2 inches deep.
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  • Benefits of Using Electric Fan that Only Covers Portion of Cooler
  • The Derale 8" Tornado Electric Fan # D16508 referenced in your question can be used as a pusher or puller. The fact that the fan will only cover a portion of the transmission cooler will still provide benefit, as the fluid from the affected area will be dispersed from there through the tubes and lines. So while the fan is only providing additional airflow to part of the cooler itself, it will still have a positive effect on the entire system. Pushing air towards the radiator will not...
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  • What is the Rotation on the Derale Belt-Driven Race Fan # D17513
  • Derale fan # D17513 is a belt-driven standard rotation fan. This means if you were standing in front of he vehicle facing the motor the fan would turn clockwise. Belt-driven race fans are not classified as pushers or pullers. With a belt-driven fan that is placed at the front of the motor and behind the radiator it will always be a puller. The center to center hole spacing range on the mounting holes is 1-3/4 inches to 2-1/4 inches. The fan is 2 inches deep and 12-3/4 inches tall. I...
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  • Is the Derale 12 inch Dyno Cool Straight Blade Fan Reversible
  • Yes, the Derale 12 inch Dyno-Cool Straight-Blade Electric Fan with Thermostat Control # D16312 is reversible. To do that you will need to follow these steps: 1. Remove the Nut or Clip that holds the electric fan blade onto the motor shaft. 2. Carefully remove the fan blade from the motor shaft.This is an interference fit and requires some effort. 3. Flip the fan blade upside down and reinstall onto the motor shaft. Make sure the roll pin on the motor shaft is aligned with the slot...
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  • Tips for Choosing an Electric Radiator Fan for a 1988 Ford Ranger XLT 4x4 with 2.9 Liter Engine
  • Electric fans like # D18214 are not vehicle specific so if you have the space to install the fan you can use it on your 1988 Ford Ranger. This fan can be mounted on either side of the radiator to either push air through it or pull air through it. If you are using the fan to supplement the factory fan then just make sure that the two fans are not working against each other. For example if the factory fan pulls air through the radiator then the supplemental fan needs to be on the other side...
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  • Replacing Clutch Radiator Fan with an Electric Fan on a 1999 GMC Yukon
  • Pushers are more efficient and more common. A puller is typically only installed when you don't have enough room between your engine and your radiator. It looks like your 1999 GMC Yukon has a 5.7 L V8 engine which means you would want to shoot for a CFM (Cubic Feet per Minute) range of 2,200 - 3,000. The most popular fan that we have in this range is the Derale 17" Radiator Fan # D18217 which has an output of 2,400 CFM. When it comes to fitting your vehicle it really just depends...
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