Oil Cooler: Service and Repair

Oil Cooler Replacement

Removal Procedure

1. Raise and support the vehicle. Refer to Vehicle Lifting.
2. Drain the engine oil and remove the oil filter housing.





3. Loosen the oil cooler outlet (1) and the inlet (2) lines from the engine block.
4. Lower the vehicle.
5. Remove the intake plenum.
6. Remove the intake manifold.





7. Disconnect the following electrical connectors from the water crossover:
^ The engine coolant temperature sender (2)
^ The engine coolant temperature sensor (4)





8. Remove the water crossover bolts (1).
9. Remove the water crossover upper and lower seals (2).





10. Loosen the upper heat shield bolts on the left side of the exhaust manifold.





11. Remove the oil cooler outlet line from the engine oil cooler.
12. Remove the oil cooler inlet line from the engine oil cooler.





13. Note the positioning of the 4 seals.





14. Position the oil feed and return,lines out of the way and secure with mechanic wire.
15. Remove the engine oil cooler, inlet and outlet nuts (1).
16. Remove the engine oil cooler cover bolts (2).





17. Remove the engine oil cooler cover.
18. Remove the engine oil cooler.
19. Clean all sealing surfaces.

Installation Procedure





1. Install the engine oil cooler.
2. Apply a 2 mm (0.08 inch) bead of RTV silicone sealant, GM P/N 12346240, in the groove around the engine oil cooler cover.
3. Install the engine oil cooler cover.

Notice: Refer to Fastener Notice in Service Precautions.





4. Install the engine oil cooler cover bolts (2).
Tighten the engine oil cooler cover bolts to 30 Nm (22 ft. lbs.).
5. Install the engine oil cooler inlet and outlet nuts (1).
Tighten the engine oil cooler inlet and outlet nuts to 20 Nm (15 ft. lbs.).
6. Reposition the oil feed and return lines.





7. Install the oil cooler outlet and install the oil cooler inlet lines to the engine oil cooler.
Use 4 new seals.
Tighten the oil feed and return lines to 30 Nm (22 ft. lbs.).





8. Install the water crossover:
^ Position the crossover.
^ Install the upper and lower seals (2).
^ Install the water crossover bolts (1).
Tighten
Tighten the water crossover bolts to 30 Nm (22 ft. lbs.).
9. Connect the electrical connectors at the following locations:
^ The engine coolant temperature sensor (4)
^ The engine coolant temperature sender (2)
10. Install the intake manifold.
11. Install the intake plenum.
12. Raise the vehicle.





13. Install the oil cooler outlet (1) line to the engine block.
Tighten the oil cooler outlet (1) line to 30 Nm (22 ft. lbs.).
14. Install the oil cooler inlet (2) line to the engine block.
Tighten the oil cooler inlet (2) line to 30 Nm (22 ft. lbs.).
15. Install the oil filter housing to the engine block.
Tighten the oil filter housing to 45 Nm (33 ft. lbs.).
16. Lower the vehicle.
17. Fill the crankcase with engine oil.