Timing Cover: Service and Repair

Removal Procedure





1. Disconnect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnect/Connect Procedure.
2. Drain the engine coolant from the cooling system. Refer to Draining and Filling Cooling System in Cooling System.
3. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement.
4. Remove the coolant recovery reservoir. Refer to Coolant Recovery Reservoir Replacement in Cooling System.
5. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement.
6. Remove the drive belt tensioner. Refer to Drive Belt Tensioner Replacement.
7. Remove the power steering pump with lines. Move the power steering pump aside. Refer to Power Steering Pump Replacement in Steering and Suspension.
8. Disconnect the thermostat bypass pipe from the engine front cover. Refer to Thermostat Bypass Pipes Replacement in Cooling System.
9. Disconnect the radiator outlet hose from the coolant pump. Refer to Radiator Hose Replacement - Outlet in Cooling System.
10. Remove the coolant pump pulley. Refer in Cooling System.
11. Remove the lower crankshaft position sensor wiring harness bracket from the engine front cover.





12. Remove the engine front cover bolts (1, 2 and 3).
13. Remove the engine front cover.





14. Remove the engine front cover gasket.
15. Clean the engine front cover and engine block gasket sealing surfaces. Refer to Engine Front Cover Clean and Inspect.
16. Inspect the engine front cover for damage to the engine front cover, crankshaft front oil seal or the gasket sealing surface. Refer to Engine Front Cover Clean and Inspect.





17. If replacing the engine front cover, remove the crankshaft position sensor from the engine front cover.
18. If replacing the engine front cover, remove the coolant pump from the engine front cover. Refer to Water Pump Replacement in Cooling System.


Installation Procedure





1. If removed, install the coolant pump to the engine front cover. Refer to Water Pump Replacement in Cooling System.
2. If removed, install the crankshaft position sensor to the engine front cover.





3. Coat both sides of the lower tabs of the engine front cover gasket with sealant GM P/N 1052080 or equivalent.





4. Install the engine front cover gasket.





5. Install the engine front cover.
6. Install the engine front cover bolts.
^ Tighten the five small engine front cover bolts (1) to 21 Nm (15 lb ft).
^ Tighten the three large engine front cover bolts (2) to 55 Nm (41 lb ft).
^ Tighten the two large engine front cover bolts (3) to 47 Nm (35 lb ft).





7. Install the lower crankshaft position sensor wiring harness bracket to the engine front cover





8. If removed, install the drive belt shield.

Notice: Refer to Fastener Notice in Service Precautions.

9. Install the drive belt shield bolt.
^ Tighten the drive belt shield bolt to 10 Nm (89 lb in).
10. Install the coolant pump pulley. Refer to Water Pump Replacement in Cooling System.
11. Connect the radiator outlet hose to the coolant pump. Refer to Radiator Hose Replacement -Outlet in Cooling System.
12. Connect the thermostat bypass pipe to the engine front cover. Refer to Thermostat Bypass Pipes Replacement in Cooling System.
13. Install the power steering pump with lines. Refer to Power Steering Pump Replacement in Steering and Suspension.
14. Install the drive belt tensioner. Refer to Drive Belt Tensioner Replacement.
15. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement.
16. Fill the engine with new engine oil. Refer to Engine Oil and Oil Filter Replacement.
17. Fill the cooling system with engine coolant. Refer to Draining and Filling Cooling System in Cooling System.
18. Connect the battery ground (negative) cable. Refer to Battery Negative Cable Disconnect/Connect Procedure.
19. Perform a CKP system variation learn procedure. Refer to CKP System Variation Learn Procedure.