Oil Pan: Service and Repair

Oil Pan Replacement
Removal Procedure





1. Remove the engine cradle.
2. Drain the engine oil and remove the engine oil filter.
3. Reinstall the drain plug and oil filter until snug.
4. Remove the left transmission closeout cover bolt and cover.





5. Remove the right closeout cover bolt and cover.





6. Disconnect the oil level sensor electrical connector.
7. Remove engine harness retainer from the front of oil pan.





8. Remove the oil pan bolts.
9. Remove the oil pan.





10. Important: DO NOT allow foreign material to enter the oil passages of the oil pan, cap or cover the openings as required.

Drill (3) out the oil pan gasket retaining rivets (2), if required.
11. Remove the gasket (1) from the pan.
12. Discard the gasket and rivets.
13. Clean and inspect the engine oil pan.

Installation Procedure

Important:
^ The alignment of the structural oil pan is critical. The rear bolt hole locations of the oil pan provide mounting points for the transmission housing. To ensure the rigidity of the powertrain and correct transmission alignment, it is important that the rear of the block and the rear of the oil pan are flush, or even. The rear of the oil pan must NEVER protrude beyond the engine block and transmission housing plane.
^ Do NOT reuse the oil pan gasket.
^ It is NOT necessary to rivet the NEW gasket to the oil pan.





1. Apply a 5 mm (0.20 inch) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.80 inch) long to the engine block. Apply the sealant directly onto the tabs of the front cover gasket that protrudes into the oil pan surface.
2. Apply a 5 mm (0.20 inch) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.8 inch) long to the engine block. Apply the sealant directly onto the tabs of the rear cover gasket that protrudes into the oil pan surface.





3. Important: Be sure to align the oil gallery passages in the oil pan and engine block properly with the oil pan gasket.

Pre-assemble the oil pan gasket to the pan.
1 Install the gasket onto the pan.
2 Install the oil pan bolts to the pan and through the gasket.

4. Notice: Refer to Fastener Notice in Service Precautions.

Install the oil pan, gasket, and bolts to the engine block.
^ Tighten the oil pan and oil pan-to-front cover bolts to 25 Nm (18 ft. lbs.).
^ Tighten the oil pan-to-rear cover bolts to 12 Nm (106 inch lbs.).
^ Tighten the transmission housing, converter cover, and transmission bolts/stud to 50 Nm (37 ft. lbs.).





5. Install engine harness to front of oil pan.
6. Connect the oil level sensor electrical connector.





7. Install the right closeout cover and bolt.





8. Remove the left transmission closeout cover bolt and cover.
Tighten the bolt to 12 Nm (106 inch lbs.).
9. Install new engine oil and a new oil filter.
10. Install the engine cradle.