This Jayrad radiator is built for the Jeep Cherokee KJ 3.7L auto from 2001 to 2008 and keeps engine temps in check over a 507 mm by 507 mm core. A 26 mm thick core handles slow climbs and soft sand where airflow drops. The 38 mm inlet and 48 mm outlet line up with factory hoses so you can swap it in without chasing odd fittings. An internal transmission cooler looks after the auto when you tow.

The breather outlet sits at 10 mm to match the small return line on the KJ setup. Core dimensions of 507 mm height and 507 mm width suit the stock fan shroud and support panel. The 26 mm core gives decent cooling without fouling other gear in the bay. Correct port sizing at 38 mm and 48 mm lets standard clamps bite properly so the setup stays dry when you get out there.

• Suits Jeep Cherokee KJ 3.7L automatic models 2001–2008
• Core height of 507 mm for strong cooling surface
• Core width of 507 mm matches factory shroud
• Core thickness of 26 mm balances flow and clearance
• 38 mm inlet diameter suits standard upper hose
• 48 mm outlet diameter suits factory lower hose
• 10 mm breather port for expansion return line
• Integrated transmission cooler for auto gearbox support
• Direct replacement configuration for A/P application
• Ideal for restoring cooling performance on touring vehicles

Q: Does this radiator suit all Jeep Cherokee KJ 3.7L models?

It suits automatic 3.7L Cherokee KJ models from 2001 to 2008 only. Manual transmission variants use a different setup without the same transmission cooler ports. Always check your build year and engine before ordering. If your compliance plate lists KJ and 3.7L with an automatic box this radiator is the match.

Q: Do I need new hoses when fitting this radiator?

Not always but hoses should be inspected and replaced if they are hard, cracked or swollen. The inlet and outlet on this radiator are 38 mm and 48 mm so factory-style hoses will fit. Tired hoses can fail shortly after a new radiator goes in. Swapping them at the same time can save coolant loss on the road.

Q: Is there a built-in cooler for the automatic transmission?

Yes this radiator includes an internal transmission cooler. The cooler connects to the factory transmission lines that run to the front of the vehicle. This helps keep fluid temperature under control while towing or in heavy traffic. Correct reconnection and leak checking of these lines is important before driving.

Q: Should the cooling system be flushed before installation?

Yes the system should be flushed to remove old coolant and debris before the new radiator goes in. Contamination left in the block or heater core can shorten the life of the new unit. A proper flush also helps the fresh coolant mix reach its correct concentration. Most workshops can handle this as part of the install.

Suitable for Jeep Cherokee KJ models with 3.7L petrol engine and automatic transmission built between 2001 and 2008. Installation requires removal of the original radiator and transfer of existing hoses, clamps and fans where applicable. Vehicle must be refilled with the correct coolant type and bled after fitment. Professional installation is recommended for correct transmission cooler line reconnection and leak checking.