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Call or Text (352) 722-5295Radiators on the 2017-2019 Ford 6.7L Powerstroke
The 6.7L Powerstroke has two separate cooling loops and a radiator for each. The primary radiator handles the high-temperature loop: block, heads, engine oil cooler, turbo, heater core and EGR cooler. The secondary radiator sits ahead of it and handles the low-temperature loop that serves the air-to-water charge air cooler, fuel cooler and transmission oil cooler. On 2017-and-later trucks the primary radiator connects with quick-disconnect fittings at the inlet and outlet.
What fails and why
Radiator leaks were a common complaint on the first-generation 2011-2014 trucks and are less common on this generation. So before you condemn a radiator for coolant loss on a 2017-2019, rule out this generation's known weak spots: the plastic degas tanks, which crack or weep at the seams, and the factory air-to-water intercooler, which can leak coolant internally into the intake with no external leak to find. If the radiator itself is the problem, the choice is between a factory-style core and more capacity.
Stock replacement vs. upgrade
If you just need a sound radiator back in the truck, CSF's OEM-style units are the direct route, built for either position. If you want more, Mishimoto's aluminum primary radiator uses an extruded-tube aluminum core and is rated at 37% more capacity and 20% more fin area than stock, with direct-fit quick-disconnects. On the secondary side, XDP's Xtra Cool XD467 is a direct-fit replacement secondary radiator.
What we carry
- Primary radiators: CSF 3849 OEM-style replacement (listed 2017-2026) and Mishimoto MMRAD-F2D-17 aluminum primary (listed 2017-2024).
- Secondary radiators: CSF 3850 OEM-style, standard output (listed 2017-2025) and XDP XD467 Xtra Cool direct-fit (listed 2017-2025).
Fitment notes
Primary and secondary radiators are not interchangeable, so order by loop. Ford's 2017-2019 primary radiator hoses are Motorcraft KM-5475 upper and KM-5517 lower; with the radiator out, it's the right time to look them over. Refill with the coolant type already in the truck and never mix types. Total capacity on 2017-2020 trucks is about 31.7 to 35.1 quarts across both loops. Chassis cab owners should confirm fitment by VIN.
Frequently asked questions
Which radiator is the primary on a 2017-2019 6.7L?
The primary is the larger radiator, mounted behind the smaller secondary. It cools the engine's high-temperature loop and uses quick-disconnect fittings on 2017-and-later trucks. The secondary, up front, serves the low-temperature loop.
Is an aluminum radiator worth it?
It depends on how you use the truck. Mishimoto rates its aluminum primary at 37% more capacity and 20% more fin area than stock. If the truck just needs a sound radiator again, CSF's OEM-style unit is the direct replacement.
Will a radiator from a 2011-2016 truck fit my 2017-2019?
Don't assume so. 2017-and-later primary radiators use quick-disconnect inlet and outlet fittings. Order by your truck's year, check the year range on the listing, and confirm with the fitment checker on the product page.
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.