Filters
7 products
Not sure it fits your truck?
Our Wildwood, FL techs will confirm the right part for your build before you buy.
Call or Text (352) 722-5295The radiator on the 2010-2018 RAM 6.7L Cummins
The 6.7L Cummins cools a cast-iron block and head through an aluminum radiator core, with about 29.5 quarts of coolant under a 16 psi cap. That iron-and-aluminum mix is why a HOAT-type coolant in the Zerex G-05 class is the recommended chemistry. The radiator works with the air-to-air intercooler and shares the same front-end airflow, so on a heavy-tow truck the two are worth thinking about together. Ram listed an improved cooling system among its 2013 changes, and the radiators here are listed either for 2010-2012 or for 2013-2018, with the secondary radiators narrowed to 2013-2015.
What fails and why
The radiator complaint owners report on these trucks centers on the fan shroud. Owners of 2014-2017 trucks report the shroud pulling into the radiator while towing, and some report overheating with a ruptured hose. Those are scattered reports, but if your truck runs hot under a load, look at the shroud and the hoses before you condemn the radiator. Check the cap too: one holding 5-6 psi instead of 16 cuts the boil-over margin. And if the upper hose is stiff and pressurized on a cold engine or coolant is being pushed out of the degas bottle, the head gasket may be starting to lift, which shows up in the cooling system first.
Stock replacement vs. upgrade
If your radiator is leaking or damaged and the truck has been happy otherwise, an OEM-style or direct-fit replacement is the straight answer: CSF OEM-style, XDP Xtra Cool direct-fit, or a Mishimoto replacement radiator. If you tow heavy and want more margin, the Mishimoto aluminum performance radiators are the upgrade in this collection. On a tow rig, think about the intercooler too, since it shares the same airflow; a thicker-core intercooler lowers intake temperatures and EGT.
What we carry
- CSF: OEM-style replacement radiators, the 3529 for 2010-2012 and the 3663 for 2013-2018, plus the 3664 secondary radiator listed for 2013-2015 2500 trucks.
- XDP: Xtra Cool direct-fit replacement radiators, the XD293 for 2010-2012 and the XD294 for 2013-2018, plus the XD466 secondary radiator for 2013-2015.
- Mishimoto: replacement radiators R13296 (2010-2012) and R13490 (2013-2018), and aluminum performance radiators MMRAD-RAM-10 (2010-2012) and MMRAD-RAM-13 (2013-2018).
Fitment notes
Radiators for 2010-2012 and 2013-2018 trucks are different parts, so start with the year. If you have a 2013-2015 truck, check whether it carries a secondary radiator; CSF lists its 3664 secondary for 2013-2015 2500 trucks and XDP lists the XD466 for 2013-2015. The hoses also change by year, so plan on matching them to the radiator. Ram 3500, 4500 and 5500 chassis cabs share the engine but use different frames, filters and exhaust routing, so verify chassis-cab fitment separately. Confirm by VIN before you order.
Frequently asked questions
Does my truck have a secondary radiator?
Some 2013-2015 trucks do. CSF lists its 3664 secondary radiator for 2013-2015 2500 trucks and XDP lists the XD466 for 2013-2015. Look at the front of your truck or call us with the VIN and we will check.
Should I buy an OEM-style or an aluminum performance radiator?
If the old radiator failed on a truck that never ran hot, an OEM-style or direct-fit replacement from CSF, XDP or Mishimoto puts it back the way it was. If you tow heavy, the Mishimoto aluminum performance radiator is the upgrade here. Either way, buy the one listed for your year range.
My truck overheats when I tow. Is it the radiator?
Maybe, but check the cheaper things first. Pressure-test the cap, look for the fan shroud pulling into the radiator and for ruptured hoses, which 2014-2017 owners report under tow. If the upper hose is hard on a cold engine or the degas bottle is pushing coolant, have the head gasket looked at.
What else should I replace with the radiator?
Look at the hoses while the system is empty, since older hoses can collapse under a vacuum fill. Test the cap, and refill with the right coolant for your year: 2007.5-2012 and 2013-2018 trucks have different factory chemistry and intervals.
Not sure what fits? Call the shop at the number in the header, or use the fitment checker on any product page. We install everything we sell.