Upgraded Radiator with Cap for Jeep Wrangler JK 2007-2018 3.6L 3.8L V6, Replace CU2957 68143886AA, 26mm Core BDFHYK

Restore and upgrade cooling performance with this direct-fit replacement radiator for Jeep Wrangler JK and Wrangler JK Unlimited models. Designed for 2007-2011 3.8L V6 and 2012-2018 3.6L V6 applications, it features a 26 mm aluminum core and OE-style mounting points to replace a leaking, clogged, corroded, or damaged factory radiator. The upgraded core helps support stable engine temperature during daily driving, highway use, hot-weather operation, low-speed trail driving, and other demanding conditions. 

Vehicle Fitment & OE Reference Numbers

OE / Interchange Reference Numbers: CU2957, 2957, 68143886AA, 68143886AB, 55056634AB.

Before ordering: Compare the OE number, overall dimensions, inlet and outlet positions, mounting points, drain location, and fan shroud mounting configuration with the original radiator.

Product Specifications & Package Includes

Package Includes: 1 × replacement radiator.

Signs Your Radiator Needs Replacement

• The engine runs hotter than normal or overheats during idling, climbing, towing, or slow-speed trail driving.
• Coolant leaks appear around the radiator tanks, seams, hose connections, drain area, or lower corners.
• The coolant level drops repeatedly without an obvious hose leak.
• Plastic end tanks are cracked, swollen, discolored, or separating from the core.
• Cooling fins are bent, clogged, corroded, or damaged.
• The temperature gauge fluctuates during stop-and-go traffic, hot weather, or off-road use.

Replacing a worn or damaged radiator helps restore coolant flow and heat transfer, reducing the risk of repeated overheating and related engine damage.

Key Features & Benefits

Direct OE-Style Replacement: Designed around factory-style mounting locations, hose connections, and fan shroud positions for compatible Jeep Wrangler JK applications.

26 mm Aluminum Core: The upgraded aluminum core supports efficient heat transfer while remaining lightweight and corrosion resistant.

Stable Cooling in Demanding Conditions: Helps maintain engine temperature during commuting, highway driving, hot-weather operation, low-speed crawling, steep trail climbs, and other high-load use.

Pressure & Leak Tested: Each radiator is tested before shipment to support dependable cooling-system performance.

Built for Replacement and Upgrade Service: Suitable for replacing radiators affected by leaks, internal blockage, damaged fins, corrosion, cracked tanks, or weakened seals.

Installation Notes & 4-Step Guide

Important: The cooling system may be pressurized and contain hot coolant. Allow the engine to cool completely before beginning. Professional installation is recommended if you are not experienced with cooling-system service.

1. Drain: Disconnect the battery if required, remove the radiator cap only after the engine has fully cooled, and drain the old coolant into a suitable container.
2. Remove: Disconnect the upper and lower radiator hoses, overflow hose, fan shroud or fan assembly, and factory mounting hardware. Remove the old radiator carefully.
3. Install: Compare both radiators before fitting. Transfer reusable brackets, cushions, drain plugs, sensors, fittings, or fan shroud hardware when required, then install the new radiator using the factory mounting points.
4. Refill & Bleed: Reconnect all hoses, refill with the vehicle manufacturer-recommended coolant mixture, bleed trapped air from the cooling system, and inspect all connections for leaks.

After installation: Inspect the radiator hoses, clamps, cap, thermostat, cooling fan, coolant reservoir, and water pump. Run the engine until operating temperature is reached, confirm fan operation, check all connections for leakage, and recheck the coolant level after the first drive and again after the engine cools.