Oil Pump Replacement
Removal ProcedureCaution: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Remove the engine oil level indicator from the guide tube.
3. Remove one bolt and the guide from the oil pump.
4. Raise and support the vehicle. Refer to Vehicle Lifting.
5. Remove the engine oil pan. Refer to Oil Pan Replacement.
6. Remove the timing belt. Refer to Timing Belt Replacement Timing Belt Replacement.
7. Remove the generator bracket bolt (1) and the generator.
8. Remove the generator bracket (2) from the cylinder block.
9. On a vehicle with an automatic transmission, lock the crankshaft by locking the flywheel (1).
10. Remove the bolt (1) of the crankshaft timing belt pulley.
11. Remove the crankshaft timing belt pulley (3).
12. Lower the vehicle.
13. Remove the 7 bolts and the oil pump from the cylinder block.
14. Remove the oil pump housing pins from the cylinder block.
Installation Procedure
^ Tools Required
- J 34853 Crankshaft Oil Seal Guide
- J 37747 Crankshaft Front Oil Seal Installer
1. Install the oil pump pins and the oil pump gasket onto the cylinder block.
2. Use a J 37747 in order to install the crankshaft oil seal into the oil pump housing (5).
3. Apply engine oil to a J 34853.
4. Fit the J 34853 to the crankshaft.
Important: Ensure that the oil seal lip is not turned out during oil pump installation.
5. Use the J 34853 in order to install the oil seal over the crankshaft.
6. Remove the J 34853.
7. Apply some GM P/N 12346004 or the equivalent to the thread portion of the short bolt (1) that mounts the oil pump.
Notice: Refer to Fastener Notice in Service Precautions.
8. Install the oil pump mounting bolts to the oil pump assembly.
Tighten the oil pump mounting bolts to 11 Nm (97 inch lbs.).
9. Install the rubber seal (2) between the oil pump (1) and the coolant pump (3).
10. Use a sharp knife in order to cut off the edge of the oil pump gasket, if there is excess.
Verify that the edge is smooth and flush with the end faces of the pump case and of the cylinder block.
11. Install the crankshaft timing belt pulley.
12. Install the bolt of the crankshaft timing belt pulley.
Notice: Refer to Fastener Notice in Service Precautions.
13. Install the bolt of the crank timing belt pulley.
Tighten the bolt of the crankshaft timing belt pulley to 130 Nm (94 ft. lbs.).
14. Install the engine oil pan. Refer to Oil Pan Replacement.
15. Install the timing belt. Refer to Timing Pelt Replacement.
16. Install the generator bracket to the cylinder block.
Tighten the generator bracket bolts to 23 Nm (17 ft. lbs.).
17. Install the generator bracket bolt and the generator.
Tighten the generator bracket bolts to 23Nm (17 ft. lbs.).
18. Install the new oil seal (3) for the guide tube to the oil pump (2).
19. Install the guide tube (1) to the oil pump (2).
Use a guide tube bolt in order to secure the guide tube to the oil pump.
Tighten the guide tube bolt to 11 Nm (97 ft. lbs.).
20. Install the engine oil level indicator to the guide tube.
21. Refill the engine oil to specifications. Refer to Capacities - Approximate Fluid.
22. Connect the negative battery cable.
23. Run the engine in order to inspect the engine oil pressure.