Upgraded Radiator with Cap for Jeep Wrangler JK 2007-2018 3.6L 3.8L V6, Replace CU2957 68143886AA, 3-Row 44mm Core BDFHYK

Upgrade your Jeep Wrangler JK cooling system with a thicker 44mm 3-row aluminum radiator.

Designed for 2007-2018 Jeep Wrangler / Wrangler JK applications with 3.8L or 3.6L V6 engines, this radiator provides a larger, performance-oriented cooling solution compared with a standard 26mm-style replacement.

It is well suited for demanding applications such as off-road driving, towing, hot-weather operation, uphill driving, and extended higher-load use.

Vehicle Fitment & OE Reference Numbers

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

Important: OE numbers are provided for reference only. Always compare your original radiator configuration with the product before ordering.

44mm Upgrade vs 26mm OE-Style Replacement

A standard OE-style radiator is mainly intended to restore factory-style cooling-system operation. This upgraded radiator is designed for Jeep owners looking for a larger 44mm 3-row core and additional cooling-system capacity for more demanding applications.

44mm vs 26mm: The upgraded core is approximately 69% thicker than a 26mm-style core.

Core thickness comparison refers to physical dimensions only and does not represent a 69% increase in cooling performance.

Why Upgrade to a 44mm Core?

Wrangler JK vehicles are frequently used beyond normal commuting. Additional cooling demand can come from:

• Low-speed off-road driving where airflow is limited
• Long uphill climbs
• Hot weather operation
• Trailer towing
• Larger tires and vehicle modifications
• Extended high-load driving

The 44mm aluminum core design increases heat transfer capacity compared with a thinner OE-style radiator, helping provide additional temperature control during demanding driving situations.

This makes it a practical upgrade for Jeep owners who want more cooling margin instead of simply replacing the original radiator with the same capacity design.

Important Clearance Information

Because the 44mm core is thicker than a standard 26mm replacement radiator, available space should be verified before installation.

For factory Jeep Wrangler JK configurations, confirm compatibility with:

• Fan assembly
• Fan shroud
• Front cooling components
• Any aftermarket accessories

Extra inspection is recommended for Jeeps equipped with:

• Custom electric fans
• Modified radiator supports
• Auxiliary coolers
• Front-end aftermarket upgrades

Checking clearance before installation helps ensure proper fitment and reliable operation.

Key Features & Benefits

• 44mm 3-Row Aluminum Core: A thicker, performance-oriented core design for drivers looking for more cooling capacity than a standard 26mm-style replacement.
• Designed for Demanding Use: Suitable for applications involving off-road driving, towing, hot weather, uphill driving, and extended higher-load operation.
• OE-Style Mounting Design: Designed around factory-style mounting locations and connections for compatible applications. Always verify fitment and clearance before installation.
• Pressure & Leak Tested: Tested before shipment to help support dependable cooling-system operation.

4-Step Installation Overview

Safety First: Never open a hot cooling system. Allow the engine and coolant to cool completely before beginning service. Professional installation is recommended if you are not experienced with automotive cooling systems.

1. Drain: Safely drain the existing coolant into a suitable container after the engine has completely cooled.
2. Remove: Disconnect the radiator hoses, overflow hose, fan / shroud assembly as required, and factory mounting hardware. Carefully remove the old radiator.
3. Compare & Install: Compare the new and original radiators before installation. Verify dimensions, hose connections, mounting points, fan / shroud clearance, and available space for the 44mm core. Transfer reusable hardware where required and install the new radiator.
4. Refill & Bleed: Reconnect all hoses, refill the cooling system with the vehicle manufacturer-recommended coolant mixture, properly bleed trapped air, and inspect all connections for leaks.

After Installation: Bring the engine to normal operating temperature and confirm proper fan operation. Inspect the radiator, hoses, clamps, cap, reservoir, thermostat area, and water pump area for leakage. Recheck the coolant level after the first drive once the engine has completely cooled.