Timing Cover: Service and Repair

Engine Front Cover Replacement

^ Tools Required
- J 36660-A Torque Angle Meter
- J 35354 Seal Installer

Removal Procedure





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. Remove the power steering pump.
8. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
9. Remove the crankshaft balancer.
10. Disconnect the oil pressure electrical connector.





11. Disconnect the crankshaft position sensor electrical connector.
12. Remove the crankshaft position sensor shield.





13. Remove the crankshaft position sensor studs.
14. Remove the crankshaft position sensor.
15. Remove the oil pan to front cover bolts.
16. Loosen the oil pan bolts, to drop the oil pan slightly in order to add clearance for the front cover installation.
17. Lower the vehicle.





18. Remove the coolant pump pulley bolts.
19. Remove the coolant pump pulley.





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





21. Remove the crankshaft front oil seal. Use a screwdriver to pry out the crankshaft front oil seal. Use care in order to avoid damage to the seal bore or seal contact surfaces.





22. Remove the engine front cover studs and bolts (1).
23. Remove the engine front cover (2).





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





25. If replacing the front cover remove the following:
^ Remove the coolant pump bolts (1).
^ Remove the coolant pump (2).
^ Remove the coolant pump gasket (3) from the front cover (4).
^ Remove the oil filter adapter.
^ Remove the camshaft position sensor.
^ Remove the oil pump gear set.
26. Clean the engine front cover and engine block surfaces.

Installation Procedure





1. If the front cover was replaced, Install the following parts:
^ Install the oil pump gear set.
^ Install the camshaft position sensor.
^ Install the oil filter adapter.
2. Install the coolant pump gasket (3) to the front cover (4).
3. Install the coolant pump (2).

Notice: Refer to Fastener Notice in Service Precautions.

4. Install the coolant pump bolts (1).
Tighten the coolant pump bolts (1) to 15 Nm (11 lb ft). Use the J 36660-A to torque the coolant pump bolts (1) an additional 80 degrees.





5. Install a new engine front cover gasket to the engine block.





6. Install the engine front cover (2).





7. Apply sealant GM P/N 12346004 or equivalent to the engine front cover bolts (1) and stud (2).
8. Install the engine front cover bolts (1) and stud (2).
Tighten the front cover bolts (1) and stud (2) to 20 Nm (15 lb ft). Use the J 36660-A to torque the front cover bolts (1) and stud (2) an additional 40 degrees.
9. Install the front crankshaft front oil seal using J 35354.





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





11. Install the coolant pump pulley.
12. Install the coolant pump pulley bolts.
Tighten the coolant pump pulley bolts to 13 Nm (116 lb in).
13. Raise the vehicle.
14. Install the oil pan to front cover bolts.
Tighten the oil pan bolts to 14 Nm (124 lb in).





15. Install the crankshaft position sensor.
16. Apply sealant GM P/N 12345283 or equivalent to the crankshaft position sensor studs.
17. Install the crankshaft position sensor studs.
Tighten the crankshaft position sensor studs to 30 Nm (22 lb ft).





18. Install the crankshaft position sensor shield.
19. Connect the crankshaft position sensor electrical connector.
20. Install the crankshaft balancer.
21. Connect the oil pressure sensor electrical connector.
22. Lower the vehicle.
23. Install the power steering pump.
24. Install the drive belt tensioner.





25. Install the air intake duct.





26. Connect the Intake Air Temperature (IAT) sensor electrical connector.
27. Fill the crankcase with engine oil.
28. Refill the engine coolant.