Oil Cooler: Service and Repair

Engine Oil Cooler Replacement

Removal Procedure




1. Drain the cooling system. Refer to Cooling System Draining and Filling (LY7, LZE, LZ4, LZ9) (Service and Repair)Cooling System Draining and Filling (GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (LE5 Static Fill) (Service and Repair).
2. Disconnect the oil pressure sensor electrical connector (1).




3. Remove the oil filter.




4. Reposition the oil cooler outlet hose clamp at the oil cooler.
5. Remove the oil cooler outlet hose from the oil cooler fitting.




6. Reposition the oil cooler inlet hose at the engine.
7. Remove the oil cooler inlet hose from the engine fitting.
8. Remove the oil cooler bolts and stud.
9. Remove the oil cooler and gasket.

Installation Procedure

Caution: Maximum gasket performance is achieved when using new fasteners, which contain a thread-locking patch. If the fasteners are not replaced, a thread locking chemical must be applied to the fastener threads. Failure to replace the fasteners or apply a thread-locking chemical MAY reduce gasket sealing capability.





1. Apply threadlock to the bolt/stud threads, if required. Refer to Adhesives, Fluids, Lubricants, and Sealers (Specifications) for the correct part number.
2. Position the oil cooler and gasket to the engine.

Caution: Refer to Fastener Caution (Fastener Caution).

3. Install the oil cooler bolts and stud.

Tighten the to bolts and stud to 25 Nm (18 lb ft).

4. Install the oil cooler inlet hose to the engine fitting.
5. Position the oil cooler inlet hose at the engine.




6. Install the oil cooler outlet hose to the oil cooler fitting.
7. Position the oil cooler outlet hose clamp at the oil cooler.




8. Install the oil filter.

Tighten the filter to 30 Nm (22 lb ft).




9. Disconnect the oil pressure sensor electrical connector (1).
10. Fill the cooling system. Refer to Cooling System Draining and Filling (LY7, LZE, LZ4, LZ9) (Service and Repair)Cooling System Draining and Filling (GE 47716 Fill) (Service and Repair)Cooling System Draining and Filling (LE5 Static Fill) (Service and Repair).
11. Check and fill the crankcase, if necessary.