A Ram radiator that weeps at the tank crimp or runs warm in traffic needs the core replaced, not another bottle of stop-leak. The CSF 3662 is a 1-row plastic-tank radiator with a core CSF lists as 15 percent thicker than the radiator it replaces. Match the cab and the year before you buy it.

• Build: One aluminum row, 21-9/16 inches by 27-1/2 inches and 1-1/4 inches thick, crossflow, with multi-louver fins.
• Tank: Glass-filled plastic tank and EPDM seals, leak-tested at 150 percent of operating pressure.
• Hoses: Inlet is 1-1/2 inch on the left and the outlet is 1-3/4 inch on the right.
• Part number: CSF 3662 crosses OEM 55056858AD, 55056858AE, 55056870AE, 55056870AF, 55057090AB, and 55057090AC.
• Fitment: 2009-2010 Dodge Ram 1500, 2011-2018 Ram 1500, 2019-2021 Ram 1500 Classic, 2010 Dodge Ram 2500, 2011-2013 Ram 2500, and 2013 Ram 3500.
• Does not fit: 2019-up Ram 1500 new body, 2014-up Ram 2500, and 2014-up Ram 3500. It is not a 6.7L Cummins primary radiator.
• Not in the box: The radiator cap is not included. CSF specifies cap 4515 for this core, 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 cab and the model year on the list above before you order. This core does not cover every Ram.