Timing Cover: Service and Repair

Engine Front Cover Replacement

Removal Procedure
1. Drain the engine oil.
2. Remove the throttle body and intake manifold.
3. Remove the power steering pump drive belt.
4. Remove the water pump drive belt.
5. Remove the left and right cylinder head covers.





6. Remove the cooling fan (3) and clutch (4).
7. Remove the water pump pulley (1).
8. Remove the radiator.
9. Remove the thermostat cap.





10. Disconnect the connector (1) to the power steering pressure switch (2).
11. Remove the 3 bolts from the power steering pump and position out of the way.
12. Remove the 3 bolts from the power steering pump bracket and remove bracket.
13. Remove the crankshaft balancer.
14. Raise the vehicle.
15. Remove the front axle housing (4WD only).
16. Remove the lower oil pan.
17. Remove the upper oil pan.
18. Lower the vehicle.
19. Disconnect the Crankshaft Position (CKP) sensor connector.
20. Remove the bolt and the Crankshaft Position (CKP) sensor.





21. Remove the bolts and the front cover (1).

Installation Procedure





1. Clean the sealing surfaces on the front cover, the crankcase, the cylinder block and the cylinder heads.
2. Apply GM P/N 12346240 or equivalent to the front cover at the points indicated (1).





3. Apply engine oil to the oil seal lip (3) and the water pump O-ring(2).

Notice: Refer to Fastener Notice in Service Precautions.

4. Install the front cover (1) and secure with the bolts.
Tighten the bolts to 11 Nm (7.5 ft. lbs.).
5. Apply engine oil to the O-ring of the Crankshaft Position (CKP) sensor.
6. Install the Crankshaft Position (CKP) sensor. Secure with the bolt.
Tighten the bolt to 6 Nm (4.5 ft. lbs.).
7. Raise the vehicle.
8. Install the upper oil pan.
9. Install the lower oil pan.
10. Install the front axle housing (4WD only).
11. Lower the vehicle.
12. Install the crankshaft balancer.
13. Install the power steering pump bracket. Secure A with the 3 bolts.
Tighten the bolts to 45 Nm (32.5 ft. lbs.).
14. Install the power steering pump. Secure with the 3 bolts.
Tighten the bolts to 25 Nm (18.5 ft. lbs.).





15. Connect the connector (1) to the power steering pressure switch (2).
16. Install the thermostat cap.
17. Install the radiator.





18. Install the water pump pulley (1).
19. Install the cooling fan (3) and clutch (4).
20. Install the cooling fan and generator drive belt (2).
21. Install the power steering pump drive belt.
22. Install the left and right cylinder head covers.
23. Install the intake manifold and throttle body.