Oil Pan: Service and Repair

Oil Pan Replacement

Removal Procedure

1. Disconnect the negative battery cable.
2. Remove the fuel injector sight shield.
3. Remove the air cleaner intake duct.
4. Install the engine support fixture.
5. Raise and support the vehicle.





6. Remove the right exhaust manifold pipe stud nuts from the catalytic converter.
7. Drain the engine oil and remove the oil filter.
8. Disconnect the oil level sensor electrical connector.
9. Remove the oil level sensor wiring harness bolt and reposition the oil level sensor wiring harness.





10. Remove the engine mount lower nuts from the engine mount.
11. Lower the vehicle.
12. Use the engine support fixture to raise the engine.
13. Raise the vehicle.





14. Remove the left engine mount bracket bolts from the engine.





15. Remove the right engine mount bracket bolts from the engine.





16. Remove the engine mount upper nuts.
17. Remove the engine mount and the bracket from the frame.
18. Remove the torque converter covers.

Notice: Remove the oil level sensor, located in the oil pan, before the oil pan is removed. The sensor may be damaged if the oil pan is removed first.





19. Remove the oil level sensor.





20. Remove the oil pan bolts.
21. Remove the oil pan.





22. Remove the oil pump pipe screen assembly and the oil pan gasket.
23. Clean the following parts:
- Oil pump screen mating surfaces
- Oil pan flanges
- Oil pan rail
- Front cover
- Rear main bearing cap
- Threaded holes

Installation Procedure





Important: For aluminum oil pans, begin with step 4. For steel oil pans, skip steps 4 and 5.

1. For steel oil pans, apply a continuous bead 6.35 mm (0.25 in) thick of RTV sealer GM P/N 12378521 (Canadian P/N 88901148) to the topside of the new windage tray gasket. Apply the RTV sealant directly over the sealing bead.
2. Install the NEW windage tray gasket onto the engine.





3. Apply a continuous bead 6.35 mm (0.25 in) thick of RTV sealer GM P/N 12378521 (Canadian P/N 88901148) to the topside of the new windage tray gasket. Apply the RTV sealant directly over the sealing bead.





4. For aluminum oil pans, apply a continuous bead 6.35 mm (0.25 in) thick of RTV sealer GM P/N 12378521 (Canadian P/N 88901148), ensuring that the sealer also completely fills the groove in the oil pan.
5. To ensure proper sealing, apply additional sealer at the four points called out in the illustration (1).





6. Install the oil pan and oil pan windage tray gasket - if applicable.





7. Install the oil pump pipe screen assembly.

Notice: Refer to Fastener Notice in Service Precautions.

8. Install the oil pump pipe screen bolts.

Tighten
Tighten the bolts to 15 Nm (11 lb ft).

9. Install the oil pan.
10. Clean the oil pan bolts and apply one drop of thread lock compound GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the oil pan bolt threads.





Important: DO NOT overtighten bolts or damage to the oil pan may occur, resulting in an oil leak.

11. Install the oil pan bolts.

Tighten
Tighten the oil pan bolts to 14 Nm (125 lb in).





12. Install the oil level sensor.

Tighten
Tighten the sensor to 20 Nm (15 lb ft).

13. Install the torque converter covers.
14. Install the engine mount and the bracket to the frame.





15. Install the engine mount upper nuts.

Tighten
Tighten the nuts to 43 Nm (32 lb ft).





16. Install the engine mount bracket to the engine.
17. Loosely install the right engine mount bracket bolts to the engine.





18. Loosely install the left engine mount bracket bolts to the engine.

Tighten
Tighten the bolts to 102 Nm (75 lb ft).

19. Lower the vehicle.
20. Using the engine support fixture lower the engine.
21. Raise the vehicle.





22. Install the engine mount lower nuts.

Tighten
Tighten the nuts to 43 Nm (32 lb ft).

23. Install the oil level sensor wiring harness and the oil level sensor wiring harness bolt to the engine.

Tighten
Tighten the bolt to 10 Nm (89 lb in).

24. Connect the oil level sensor electrical connector.





25. Install right exhaust manifold pipe stud nuts.

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

26. Install the engine oil filter.
27. Lower the vehicle.
28. Remove the engine support fixture.
29. Install the right and left engine mount struts.
30. Install the air cleaner intake duct.
31. Fill the crankcase with engine oil.
32. Install the fuel injector sight shield.
33. Connect the negative battery cable.
34. Inspect for leaks.