1999 GM 6.5L V8 – Oil Pan Replacement – Installation Procedure

1. Apply a 2 mm (1/16 inch) bead of RTV sealant GM P/N 12345739 to the oil pan rear seal at the inside corners where the seal meets the rear crankshaft bearing cap on the engine block.

2. Install the oil pan rear seal to the rear crankshaft bearing cap before the sealer starts to dry.

3. Install the oil pan to the engine block.

Notice: Refer to Fastener Notice in Caution and Notices.

4. Install the oil pan bolts to the engine block.
Tighten
4.1. Tighten the bolts in the following order:
4.2. Tighten the two rear bolts to 17 N-m (23 Ibft).
4.3. Tighten all the other bolts to 10 N-m (89 Ib in).

5. Install the flywheel to the crankshaft. Refer to Engine Flywheel Replacement

6. Install the clutch assembly (if equipped). Refer to Clutch Assembly Replacement in Clutch.

7. Install the transmission (2 wheel drive models only) to the vehicle.
• For the 4L 80-E automatic transmission, refer to Transmission Replacement in Transmission/Transaxle.
• For the N 4500 manual transmission, refer to Transmission Replacement in Transmission/Transaxle.

8. Install the front differential carrier in the vehicle (4 wheel drive mode ls only). Refer to Differential Carrier Assembly Replacement in Front Axle.

9. Install the front propeller shaft (4 wheel drive mode ls only).
• For vehicles equipped with the non active transfer case, refer to Propeller Shaft Replacement (Front Axle – All Except NP8) in Driveline/Axle.
• For vehicles equipped with the active transfer case, refer to Propeller Shaft Replacement (Front Axle – NP8) in Driveline/Axle.

10. Lower the vehicle.

11. Install the oil level indictor and tub e to the engine block. Refer to Oil Level Indicator and Tube Replacement.

12. Fill the crankcase with engine oil.

13. Connect both the battery negative cables to the batteries. Refer to Battery Cable in Engine Electrical.

 

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