Oil Cooler: Service and Repair

Engine Oil Cooler Replacement

Removal Procedure




1. Drain the cooling system. Refer to Draining and Filling Cooling System (LY7, LZ4, LZ9 Static Fill) Draining and Filling Cooling System (GE 47716 Fill) Draining and Filling Cooling System (LE5 Static Fill) .
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

Notice: 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 Sealers, Adhesives, and Lubricants for the correct part number.
2. Position the oil cooler and gasket to the engine.

Notice: Refer to Fastener Notice .

3. Install the oil cooler bolts and stud.

Tighten the to bolts and stud to 25 N.m (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 N.m (22 lb ft).




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