Timing Cover: Service and Repair

REMOVAL PROCEDURE

^ Tools Required
- J25034-C Power Steering Pump Pulley Remover





1. Drain the engine oil.
2. Drain the engine coolant.
3. Disconnect the Intake Air Temperature (IAT) sensor electrical connector.





4. Remove the air intake duct.
5. Loosen the coolant pump pulley bolts.
6. Remove the drive belt tensioner.





7. Use the J25034-C to remove the power steering pump pulley.





8. Place a drain pan under the power steering pump (1).
9. Disconnect the inlet hose (3) from the power steering pump (1).
10. Reposition the hose clamp on the return line (2).
11. Disconnect the reservoir hose return line (2) from the power steering pump (1).





12. Remove the power steering pump nuts (3).
13. Remove the power steering pump (1).
14. Raise and suitably support the vehicle.
15. Remove the crankshaft balancer.





16. Disconnect the crankshaft position sensor electrical connector.
17. Remove the crankshaft position sensor shield.





18. Remove the crankshaft position sensor studs.
19. Remove the crankshaft position sensor.
20. Remove the oil pan to front cover bolts.
21. Loosen the oil pan bolts, to drop the oil pan slightly in order to add clearance for the front cover installation.
22. Lower the vehicle.





23. Remove the coolant pump pulley bolts.
24. Remove the coolant pump pulley.





25. Remove the radiator outlet hose from the front cover.





26. Remove the engine front cover studs and bolts (1).
27. Remove the engine front cover (2).





28. Remove the engine front cover gasket from the engine block.





29. Remove the coolant pump bolts (1).
30. Remove the coolant pump (2).
31. Remove the coolant pump gasket (3) from the front cover (4).





32. If replacing the front cover (1), disassemble the following parts:
32.1. Oil pump gear set (2)
32.2. Camshaft sensor (3)
32.3. Oil filter adapter (5) and gasket
32.4. Oil pressure relief valve (6) and spring
33. Clean the engine front cover and the engine block gasket surfaces.

INSTALLATION PROCEDURE

^ Tools Required
- J36660-A Torque Angle Meter
- J35354 Seal Installer
- J25033-C Power Steering Pump Pulley Installer





1. If replacing the front cover (1), assemble the following parts:
1.1. Oil pump gear set (2)
1.2. Camshaft sensor (3)
1.3. Oil filter adapter (5) and new gasket
1.4. Oil pressure relief valve (6) and spring
2. Install a new crankshaft front oil seal (4)





3. Install the crankshaft front oil seal to the front cover using the J35354 and a soft faced hammer.





4. Install the coolant pump gasket (3) to the front cover (4).
5. Install the coolant pump (2).

NOTICE: Refer to Fastener Notice in Service Precautions.

6. Install the coolant pump bolts (1).

Tighten
Tighten the coolant pump bolts (1) to 15 Nm (11 lb ft). Using J36660-A tighten the coolant pump bolts (1) an additional 80 degrees.





7. Install the engine front cover gasket to the engine block.





8. Install the engine front cover (2).
9. Align the cogs on the crankshaft sprocket with the cogs on the oil pump in the engine front cover.





10. Apply sealant GM P/N 12346004 or equivalent to the engine front cover bolts (1) and stud (2).
11. Install the engine front cover bolts (1) and stud (2).

Tighten
Tighten the front cover bolts (1) and studs to 20 Nm (15 lb ft). Using J36660-A tighten the front cover bolts (1) and stud (2) an additional 40 degrees.





12. Install the radiator outlet hose to the front cover.





13. Install the coolant pump pulley.
14. Install the coolant pump pulley bolts.

Tighten
Tighten the coolant pump pulley bolts to 13 Nm (115 lb in).

15. Raise and suitably support the vehicle.
16. Install the oil pan to front cover bolts.
17. Tighten the loose oil pan bolts.

Tighten
Tighten the oil pan bolts to 14 Nm (10 lb ft).





18. Install the crankshaft position sensor.
19. Apply sealant GM P/N 12346004 or equivalent to the crankshaft position sensor studs.
20. Install the crankshaft position sensor studs.

Tighten
Tighten the crankshaft position sensor studs to 20 Nm (15 lb ft). Using J36660-A tighten the sensor studs an additional 40 degrees.





21. Install the crankshaft position sensor shield.
22. Connect the crankshaft position sensor electrical connector.
23. Install the crankshaft balancer.
24. Lower the vehicle.





25. Install the power steering pump (1).
26. Install the power steering pump nuts (3).

Tighten
Tighten the power steering pump nuts to 30 Nm (23 lb ft).





27. Connect the reservoir hose return line (2) to the power steering pump (1).
28. Position the return line (2) hose clamp in the correct location.
29. Connect the inlet hose (3) to the power steering pump (11).

Tighten
Tighten the inlet hose (3) fitting to 28 Nm (21 lb ft).





30. Use the J25033-C to install the power steering pump pulley.
31. Remove the J25033-C.
32. Install the drive belt tensioner.





33. Install the air intake duct.





34. Connect the Intake Air Temperature (IAT) sensor electrical connector.
35. Refill the engine oil.
36. Refill the engine coolant.