The secondary radiator on a 2017-up 6.7L Powerstroke leaks or plugs while the primary still looks fine, and the engine still runs hot. Replace that secondary with the CSF 3850. It is a 2-row core in place of the factory 1-row secondary, with quick-connect pipes.

• Build: Core is 20-11/16 inches tall, 39-3/8 inches wide, and 1-5/8 inches thick. It will not fill the primary opening.
• Pipes: Both the inlet and the outlet are 7/8 inch and both are on the left, with quick-connect inlet and outlet pipes.
• No transmission cooler: No transmission oil cooler is in this secondary radiator.
• Tank: Glass-filled plastic tank and EPDM seals, leak-tested at 150 percent of operating pressure.
• Part number: CSF 3850 crosses OEM HC3Z8005A, HC3Z8005E, and PC3Z8005B.
• Fitment: 2017-2026 Ford F-250, F-350, F-450, and F-550 Super Duty 6.7L secondary radiator.
• Does not fit: The primary radiator, CSF 3849, the 6.2L gas radiator, CSF 3848, and 2011-2016 trucks.
• Not in the box: The radiator cap is not included, and the hoses and clamps are not in the box.
• Warranty: CSF lists a 2-year limited warranty for the original owner. The term is on the warranty card in the box.

Order today to secure your replacement. Confirm the failed radiator is the secondary and both hoses are the 7/8 inch left-side pipes before you order.