Symptoms
Oil, and sometimes coolant, pooling in the engine valley under the intake and running down the back of the block. The 3.6 Pentastar shares this housing with the JK and JL.
The fix, step by step
- Remove the engine cover and air intake, then the upper intake manifold and lower intake runners to reach the valley.
- Disconnect the sensors on the housing, unbolt it, clean the valley thoroughly and fit the new housing with new seals.
- Refit the intake with new gaskets, refill oil and coolant, bleed the cooling system and check for leaks.
- Don't over-tighten the plastic filter cap.
Tools & part numbers
- Metric and Torx sockets
- inch-pound torque wrench
- hose pliers
- shop towels to plug intake ports
Where to buy the parts
Mopar/Dorman 68755454AA aluminum oil filter housing with element, JK/JL/JTQuadratec ↗Amazon ↗
Crown 68191350AA oil filter cap kit, 3.6L JK/JL/JTQuadratec ↗Amazon ↗
Mopar 68163849AB pre-diluted OAT coolantQuadratec ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Jeep Gladiator JT parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.