Timing Cover: Service and Repair

^ Tools Required
- J 22102 Front Cover Seal Installer

Removal Procedure

Notice: Perform TDC Offset Recovery procedure if the timing chain, timing gears, engine front cover, crankshaft position sensor, crankshaft or other components affecting the timing are replaced.





1. Disconnect the battery negative cables from the batteries. Refer to Battery Negative Cable Disconnect/Connect Procedure.
2. Drain the cooling system. Refer to Draining and Filling Cooling System in Cooling System.





3. Remove the engine oil fill tube from the front cover.
4. Remove the crankshaft balancer from the crankshaft. Refer to Crankshaft Balancer Replacement.
5. Remove the water pump from the engine front cover. Refer to Water Pump Replacement in Cooling System.
6. Raise the vehicle and install safety stands (if needed). Refer to Vehicle Lifting.
7. Remove the crankshaft position sensor from the engine front cover.





8. Remove the fuel injection drive gear from the fuel injection pump.





Important: Mark the fuel line clips, so that they can be re-installed on the proper stud.

9. Remove the bolts from the engine front cover.





10. Remove the engine front cover from the engine block.
11. Clean and inspect the sealing surface of the engine block.


Installation Procedure





1. Use the J 22102 to install the new front crankshaft front oil seal.





2. Apply a 2 mm (3/32 inch) bead of anaerobic sealant GM P/N 1052357 or equivalent to the engine front cover.
3. Apply a 5 mm (3/16 inch) bead of RTV sealant to the engine front cover sealing the surface that mates against the oil pan.





4. Install the engine front cover to the engine block.





Notice: Refer to Fastener Notice in Service Precautions.

5. Install the engine front cover bolts.
^ Tighten the nuts to 40 Nm (30 ft. lbs.).





6. Install the attaching bolts and the fuel injection pump studs.
^ Tighten the nuts to 40 Nm (30 ft. lbs.).





7. Install the fuel injection pump drive gear and bolts to the fuel injection pump.
^ Tighten the bolts to 25 Nm (20 ft. lbs.).
8. Install the crankshaft balancer to the crankshaft. Refer to Crankshaft Balancer Replacement.





9. Install the crankshaft position sensor to the engine front cover.
10. Remove the safety stands and lower the vehicle. Refer to Vehicle Lifting.
11. Install the water pump to the engine block. Refer to Water Pump Replacement in Cooling System.





12. Fill the cooling system. Refer to Draining and Filling Cooling System in Cooling System.
13. Install the engine oil fill tube to the front cover.
14. Connect the battery negative cables to the batteries. Refer to Battery Negative Cable Disconnect/Connect Procedure.
15. Perform the TDC offset adjustment. Refer to Fuel Injection Pump TDC Offset Adjustment.