For 1990-2009 cars

#### Special Tools

• | J 35268-A Camshaft/Front Main Seal Installer

• | J 36660-A Torque/Angle Meter

• | J 42098 Crank Hub Torx Socket

• | J 42065 Crank Hub Holding Tool

### Removal Procedure

Caution: Refer to Battery Disconnect Caution in the Preface section.

1. Disconnect the negative battery cable.
2. Recover the A/C system. Refer to Refrigerant Recovery and Recharging .
3. Drain the coolant. Refer to Cooling System Draining and Filling.
4. Remove the intake air resonator. Refer to Intake Air Resonator Replacement.
5. Remove the intake plenum. Refer to Intake Plenum Replacement.
6. Remove the front timing belt cover. Refer to Timing Belt Cover Replacement.
7. Remove the timing belt. Refer to Timing Belt Replacement.
8. Remove the rear timing belt cover. Refer to Timing Belt Rear Cover Replacement.
9. Remove the A/C compressor. Refer to Air Conditioning Compressor Replacement.
10. Remove the A/C compressor and power steering pump bracket bolts from the engine block.
11. Position the A/C-PS bracket out of the way of the oil pump housing and secure with mechanic's wire.
12. Remove the generator lower mounting bolt (3).
13. Loosen the upper generator mounting bolt (6).
14. Pivot the generator out of the way and secure with mechanics wire.
15. Remove the lower oil pan. Refer to Oil Pan Replacement.
16. Remove the upper oil pan. Refer to Oil Pan Replacement.
17. Mount the J 42065 to the crankshaft drive gear.
18. Use the J 42098 to remove the crankshaft drive gear bolt.
19. Remove the crankshaft drive gear.
20. Remove the oil pump bolts.
21. Discard the old oil pump bolts.
22. Remove the oil pump.
23. Remove the front main oil seal and collar from the oil pump.
24. Clean the oil pump sealing surfaces if the pump is to be reinstalled.
25. Clean the engine block (1) and the upper oil pan sealing surfaces.
26. Ensure all of the old sealant, gasket material and residual oil is removed.
27. Ensure the guide pins (2) are in place.

### Installation Procedure

Important: Do not cover and/or restrict the gasket openings and oil passages with sealant. Only apply sealant to the crosshatched area of the gasket as shown in the illustration.

1. Coat the pump side of the new oil pump gasket with a thin, even coating of GM P/N 1052942 or equivalent.
2. Install the oil pump gasket.
3. Install the oil pump and align with the guide pins (2).
4. Coat the new oil pump bolts with GM P/N 12345493 or equivalent.

Notice: Refer to Fastener Notice in the Preface section.

5. Install the oil pump bolts.

Tighten
Tighten the oil pump bolts to 12 N·m (9 lb ft).

6. Install the collar.
7. Coat the lip of the front main oil seal with a small amount of GM P/N 12377985 chassis grease, or equivalent, to aid in installation.
8. Install the front main oil seal.
9. Use the J 35268-A to tap the front main oil seal into place.

Ensure the front main oil seal if fully and evenly seated.

10. Install the crankshaft drive gear.
11. Install a new crankshaft drive gear bolt.

Tighten
Tighten the crankshaft drive gear bolt, while counterholding with J 42065 , to 250 N·m (184 lb ft) on the first pass, 45 degrees on the second pass and 15 degrees on the third pass.

12. Install the upper oil pan. Refer to Oil Pan Replacement.
13. Install the lower oil pan. Refer to Oil Pan Replacement.
14. Release and pivot the generator into place and install the generator lower mounting bolt (3).

Tighten
Tighten the generator lower mounting bolt to 35 N·m (26 lb ft).

Important: The oil pump bolts must be re-tightened AFTER the generator mounting bolt has been tightened to specifications to allow for uniform compression of the oil pump gasket.

15. Re-tighten the oil pump bolts.

Tighten
Tighten the oil pump bolts to 20 N·m (15 lb ft).

16. Re-position the A/C compressor and power steering pump bracket.
17. Install the A/C compressor and power steering pump bracket bolts.

Tighten
Tighten the A/C compressor and power steering pump bracket bolts to 40 N·m (30 lb ft).

18. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement.
19. Install the rear timing belt cover. Refer to Timing Belt Rear Cover Replacement.
20. Install the timing belt. Refer to Timing Belt Replacement.
21. Install the front timing belt cover. Refer to Timing Belt Cover Replacement.
22. Install the intake plenum. Refer to Intake Plenum Replacement.
23. Install the intake air resonator. Refer to Intake Air Resonator Replacement.
24. Charge the A/C system. Refer to Refrigerant Recovery and Recharging .
25. Connect the negative battery cable.
26. Reprogram the applicable accessories. Refer to Reprogramming Accessories After Battery Disconnect.
27. Fill the cooling system. Refer to Cooling System Draining and Filling.