The 2003-2009 Ram Cummins radiator leaks at the plastic tank or runs hot once the single factory row is clogged. Replace it with the CSF 3710, a 2-row core that is thicker than the factory 1-row 36 mm core. It drops into the same 2500 and 3500 opening.

• Build: Two aluminum rows, 28-9/16 inches by 26-15/16 inches and 1-5/8 inches thick, replace the thinner factory 1-row core and add fin area for grade pulls.
• Tank: Glass-filled plastic tank with an EPDM seal, leak-tested at 150 percent of operating pressure, so the crimp that usually splits is the part CSF pressure-checks.
• Hoses: Inlet is 2 inches on the left and the outlet is 2 inches on the right.
• Part number: CSF 3710 crosses OEM 52028900AD and 55056816AA.
• Fitment: 2003-2009 Dodge Ram 2500 and 3500, plus 2008-2009 Ram 4500 and 5500, with the 5.9L or 6.7L Cummins.
• Does not fit: 2010-up 6.7L Rams. Those trucks use CSF 3529, not this core.
• 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 year is 2003-2009 on a 2500 or 3500, or 2008-2009 on a 4500 or 5500, before you order.