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  1. Engine Oil Coolers
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  3. Stacked-Plate Cooler
  4. W/ Sandwich Adapter
  5. With - 8 AN Inlets
  6. Class III
Derale Stacked-Plate Engine Oil Cooler Kit w/ Non-Thermostatic Sandwich Adapter - Class III

Derale Stacked-Plate Engine Oil Cooler Kit w/ Non-Thermostatic Sandwich Adapter - Class III

Item # D15604
Our Price: $175.31
Engine Oil Coolers
Shipping Weight: 7 lbs
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Derale Stacked-Plate Cooler - D15604
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13" Wide x 4-9/16" tall x 2" deep, super-efficient, stacked-plate cooler core comes with a sandwich adapter and all necessary installation hardware, making it easy to prolong the life of your engine and improve its overall performance. 1-800-940-8924 to order Derale engine oil coolers part number D15604 or order online at Free expert support on all Derale products. Great prices and Fastest Shipping for Derale Stacked-Plate Engine Oil Cooler Kit w/ Non-Thermostatic Sandwich Adapter - Class III. Engine Oil Coolers reviews from real customers.
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  • Reviews (9)
  • Q & A (0)
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Derale Engine Oil Coolers - D15604

  • Stacked-Plate Cooler
  • W/ Sandwich Adapter
  • With - 8 AN Inlets
  • Class III
  • Derale
  • 13W x 4-9/16T x 2D Inch

13" Wide x 4-9/16" tall x 2" deep, super-efficient, stacked-plate cooler core comes with a sandwich adapter and all necessary installation hardware, making it easy to prolong the life of your engine and improve its overall performance.


  • Prolongs life of engine oil, reducing number of necessary changes
  • Improves overall functioning and performance of engine
  • Reduces oil temperature by as much as 50 degrees
  • Cools effectively through use of super-efficient, stacked-plate core
    • Most efficient cooling system with the large surface area of the stacked plate design and turbulator technology
    • Furnace-brazed aluminum construction for great heat dissipation
  • Provides external lines, via sandwich adapter, for simple installation of oil cooler without having to reposition oil filter
  • Includes:
    • Stacked-plate cooler core
    • Sandwich adapter
    • High-temperature, high-pressure rubber hose with stainless steel clamps
    • Brass hose-barb adapters
    • Multiple sleeve nuts to ensure proper thread size
    • Complete mounting kit
  • Made in USA


  • Heat exchanger:
    • Inlets: -8 AN
    • Overall dimensions: 13" wide x 4-9/16" tall x 2" deep
    • Distance between inlets: 10"
    • Distance between mounting holes: 12-1/4"
  • Sandwich adapter:
    • Inlet/Outlet ports: 3/8" NPT
    • O-ring diameters: 2-3/4" and 2-1/2"
    • Engine filter thread size: 3/4"-16, 13/16"-16, 18 mm x 1.5 mm, 20 mm x 1.5 mm and 22 mm x 1.5 mm
  • 1-Year warranty

The stacked-plate heat exchanger included is the most effective type of oil cooler, primarily because of its increased surface area. Allowing fluid to spread out over this larger surface area decreases the time required for heat transfer to take place, resulting in ultimate efficiency.

The sandwich adapter in this kit provides the external oil lines necessary to install a cooler without requiring you to move the factory spin-on oil filter, making it even easier to extend the life of your vehicle's engine.


15604 Derale Stacked Plate Engine Oil Cooler Kit with Sandwich Adapter, Type D

Installation Details D15604 Installation instructions

Customer Reviews

Derale Stacked-Plate Engine Oil Cooler Kit w/ Non-Thermostatic Sandwich Adapter - Class III - D15604

Average Customer Rating:  3.4 out of 5 stars   (9 Customer Reviews)

13" Wide x 4-9/16" tall x 2" deep, super-efficient, stacked-plate cooler core comes with a sandwich adapter and all necessary installation hardware, making it easy to prolong the life of your engine and improve its overall performance.


I am extremely disappointed in this product. Installation has been a nightmare, even being someone that has automotive experience.
From's recommendations to other customers I purchased this oil cooler for my 2010 Dodge Journey.
Unless you have access to some way to make a custom mounting bracket mounting is impossible. This CANNOT be mounted using the supplied method due to the stock cooling fan mounting shroud.
After making my own mounting brackets from aluminum this cooler has done nothing but leak.
It uses adapters, attached to adapters to make the connections to the tank, they leak.
To attach the lines to the sandwich plate the instruct you to use teflon tape, or a similar sealant. With the temperatures and pressures involved keeping this from leaking took several attempts, not to mention oil sprayed all over the underside of my vehicle, including my brakes, and the front of my brand new trailer.
Overall a very, very disappointing experience with this product.


Save your money. Two big problems. First, the sandwich plate adapter continues to work loose causeing an oil leak. I've removed the filter and retourqed to Derale specs a couple of times and it eash time after a couple of days it starts to leak again. Derale tech support was not at all helpful, they said, hmmmm, maybe tighen it a litte more, which I did, and it didn't help. Second issue is this cooler is very small, I installed it on a Ram 1500 5.7l and it made no noticable difference in the engine oil tempure when towing. I considered buying a larger cooler core and asked Derale tech support for some sizing guidance and their best response was put as big a one as will fit. Lot of science going on there. Couldn't give me any information regarding input and output temps vs flow, sizeing guidelines by displacement, nothing, no data of any kind seemed available. I'll make one more attempt to reseal, retighten, try a new o-ring etc. It doesn't work it's coming off and going in the trash. Overall the kit is sized for a very, very small application, maybe your riding lawn mower, that should be indicated. On a full size 1/2ton pickup this does next to nothing for your oil temp. Unfortunately tech support from Derale was no help whatsoever and showed not interest in helping trouble shoot or solve the problem. Very disappointing, I'd look else where.


I bought this engine oil cooler so I could pull my 21 foot boat with my 2016 Ford Explorer. I am very pleased with how it works. It was easy to install even with having to remove the bumper cover so I could attach it to the front of the radiator. I would buy another one if I ever needed to. I would also buy from etrailer again, they have great prices and products.


Installed the Derale engine oil cooler today. Excellent kit installed without any problems. Parts were very complete. I am pleased with the proiduct.


sandwich plate is poor quality, o-ring doesnt seal well. had to buy another companies sandwich plate to stop the leak.


Really happy with this kit


Very fast service. Hose length was spot on. Will be towing this next week and will see the difference from before.


Great product



See what our Experts say about this Derale Engine Oil Coolers

  • Will Installing an Oil Cooler on a Vehicle Void the Warranty of it
    An oil cooler like the # D15604 installed properly would not void the warranty of a vehicle, but you should still check with the manufacturer of the vehicle to get their stance on this type of modification first. When you install an aftermarket part on your vehicle like an oil cooler in this case, you are protected by the Magnuson–Moss Warranty Act. This act states, in part, that unless the installation and the part caused a problem then the warranty cannot be voided. I recommend looking...
    view full answer...
  • Cooling Options for a 2011 Ram Truck Towing an 8,000 lb Trailer
    Based on the research I have done, it does seem like your engine oil temperature is running a little high when towing, so I would recommend at least installing an engine oil cooler. The engine oil cooler that I would recommend is the Derale Stacked-Plate Engine Oil Cooler Kit, # D15604. This cooler is only 4-9/16 inches tall x 13 inches wide x 2 inches deep. This cooler will work well if you already have a supplemental transmission cooler installed on your truck. You could also use the...
    view full answer...
  • Recommended Oil Cooler for 2006 Saturn Vue with 3.5L Engine
    For your 2006 Vue, I would recommend the Derale Oil Cooler Kit with Sandwich Oil Filter Adapter, part # D15604. The adapter provided with the kit is compatible with the PH7317 oil filter used by your 3.5L engine with 2-1/2 O-ring diameter and 20x1.5mm threads.
    view full answer...
  • Can Transmissions and Engine Oil Coolers be Mounted Vertically
    As long as the fins on the Derale Cooler # D15604 or # D13611 are facing out so they can get airflow then you can mount them vertically if you needed to. I have included a link to a video review of transmission cooler # D13611 for you and an FAQ on oil coolers for # D15604.
    view full answer...
  • Combination Engine Oil and Transmission Fluid Cooler Recommendation for a 2007 Toyota 4Runner
    Since you are interested in an engine oil cooler and an additional transmission cooler I would recommend you consider getting a combination transmission and engine oil cooler like part # D15902. This product has multiple thread options so it should fit your vehicle. The benefit to a combination cooler like this is that you only have to mount one cooler yet it will function to cool the transmission fluid and engine oil of your vehicle. I attached an FAQ on transmission coolers and engine...
    view full answer...
  • Transmission Cooler for 2008 Nissan Frontier 2.5L 4cyl w/ Manual Transmission
    Due to its lack of a pump, and due to the fact that it uses a thicker gear oil rather than transmission fluid, it is neither necessary nor feasible to cool a manual transmission. However, if your truck is subjected to hard use, an oil cooler would be a good addition. The # D15604 kit, which includes everything necessary for installation, would work well for you. I have also linked you to an informative article with more information about engine oil coolers.
    view full answer...
  • Engine Oil Cooler for a 2015 RAM 1500 with 5.7L Motor
    Stacked plate coolers such as # D15604 are very efficient and you likely would not have to go to a larger cooler because of the stacked plate design. But if you want the optimum amount of cooling all the time I recommend going with a remote cooler such as # D15500. It has its own fan so it will provide the most cooling all the time; even when sitting still such as at a traffic light.
    view full answer...
  • Remote Engine Oil Cooler for a 1984 Chevy G30 Van Class C Motor Home
    Provided you have space for cooler # D15604 you could certainly use it on your 1984 Chevy G-series van. The overall depth is 2 inches, width 13 inches, and height 4-9/16 inches. Or you could go with a remote cooler that has it own fan like # D15450. With this set up you are not limited to placing the cooler in the front of the vehicle. It could go anywhere there is space since it has its own fan. It is 4-5/16 inches deep, 12-3/4 inches wide, and 9-3/8 inches tall.
    view full answer...
  • Engine Oil Cooler for a 2010 Honda Accord
    Engine oil coolers are not vehicle specific so can use any one that will fit in the space available in the engine compartment. Based on what I could find on the motor in your 2010 Honda Accord, it uses a 20x1.5mm filter thread and 2-1/2 inch diameter O-ring. For those sizes you will need to use kit # D15604 since the other kit, # D15602, does not have the proper O-ring size. I have included a link to the installation details and a link to our informational article on engine oil coolers for you.
    view full answer...
  • Engine Oil Cooler Recommendation for a 2011 Toyota Tacoma
    For your 2011 Toyota Tacoma, I recommend the Derale Stacked-Plate Engine Oil Cooler Kit, # D15604. This kit contains o-ring diameter sizes 2-3/4 inches and 2-1/2 inches. These are the most common sizes used on Toyota trucks. It also has multiple filter thread sizes so you will be able to find one that works. The stacked plate design is very efficient and does not take up a lot of space which will increase the places you will be able to mount the cooler. The cooler is 4-9/16 inches tall,...
    view full answer...
  • Engine Oil Cooler Recommendation for a 2010 Dodge Journey STX
    For your 2010 Dodge Journey, I recommend the Derale Stacked-Plate Engine Oil Cooler Kit w/ Non-Thermostatic Sandwich Adapter, # D15604. This kit comes with multiple engine filter thread sizes, one of which should fit your Journey. The kit includes the cooler, hose, sandwich adapter, and all the hardware needed for installation. I have included a link to our FAQ article on Engine Oil Coolers for reference.
    view full answer...
  • Oil Cooler Sandwich Adapter D25770
    We have the adapters you need but we do not sell them separate. This kit # D25772 comes with the M20 x 1.5mm adapter though. You will want to return the part you ordered # D25770. You can call our customer service and they will help with the return!
    view full answer...
  • Will an Engine Oil Cooler Help Bring Down Engine Temperature on a 1970 Plymouth Cuda
    The Derale Stacked-Plate Engine Oil Cooler, # D15604, that you mentioned would be a good addition to help cool the engine oil in your 1970 Cuda. An oil cooler like # D15604 should provide you with a drop in your water temperatures. Most likely it would be a drop between 10-20 degrees but it really depends on the vehicle and how much airflow the cooler gets. I would recommend checking the specifications for cooling your specific 5.7 liter Hemi engine and going with the manufacturer recommendation...
    view full answer...
  • Can Derale Stacked-Plate Engine Oil Cooler Kit Fit 2019 Dodge Charger and 2020 Ram 1500 V8
    Your 2019 Dodge Charger with a 6.4 liter V8 and your 2020 Ram 1500 with a 5.7 liter has oil filter threads of 22 mm x 1.5 mm which is one of the threaded filter sizes included with the # D15604 so it would work on both vehicles.
    view full answer...

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Info for this part was:

Employee DeAnne T
Updated by:
DeAnne T
Employee Daron K
Updated by:
Daron K
Employee Robert G
Expert Research:
Robert G
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C

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