Timing Cover: Service and Repair

Removal Procedure





1. Disconnect both the battery negative cables from the batteries. Refer to Battery Replacement.
2. Remove the right accessory bracket from the engine block. Refer to Accessory Brackets Replacement (Left).

Important: When performing this service procedure, it is not necessary to evacuate the air conditioning compressor system. Just move the A/C compressor to the side and secure out of the way.

3. Remove the air conditioning compressor from the left accessory bracket.





4. Remove the engine oil fill tube from the engine front cover.
5. Remove the left accessory bracket from the engine block. Refer to Accessory Brackets Replacement (Right).
6. Remove the water pump from the engine front cover. Refer to Water Pump Replacement (Diesel) in Cooling System.
7. Remove the crankshaft balancer from the crankshaft. Refer to Crankshaft Balancer Replacement.





8. Remove the crankshaft position sensor from the engine front cover.





9. Remove the fuel injection drive gear from the camshaft.
10. Remove the mounting bolts for the fuel injection pump. Refer to Fuel Injection Pump Replacement-6.5L-L65.





11. Remove the bolts from the engine front cover.
12. Remove the bolts from the oil pan to the engine front cover.





13. Remove the engine front cover from the engine block.
14. Remove the crankshaft front cover oil seal.


Installation Procedure

^ Tools Required
- J 22102 Seal Installer





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





Important: Make sure that the grooves on either side of the engine front cover are free of oil and dirt before installing the engine front cover.

2. Apply a 2 mm (3/32 inch) bead of anaerobic sealant GM P/N 1052357 to the engine front cover.
3. Apply a 5 mm (3/16 inch) bead of RTV sealant GM P/N 12345739 to the engine front cover sealing surface that mates with oil pan.





4. Install the engine front cover to the engine block.
5. Install the bolts from the oil pan to the front cover.





Notice: Refer to Fastener Notice in Service Precautions.

6. Install the engine front cover mounting bolts.
^ Tighten the bolts and studs to 40 Nm (30 ft. lbs.).
7. Install the fuel injection pump mounting bolts and tighten. Refer to Fuel Injection Pump Replacement-6.5L-L65.





8. Install the fuel injection pump drive gear to the fuel injection pump.
^ Tighten the bolts to 25 Nm (20 ft. lbs.).
9. Install the water pump to the engine block. Refer to Water Pump Replacement (Diesel) in Cooling System.

Important: Check the marks on the fuel line clips made during removal. Ensure that the fuel line clips are re-installed on the proper studs.

10. Install the crankshaft balancer to the crankshaft. Refer to Crankshaft Balancer Replacement.
11. Install the crankshaft position sensor to the engine front cover. Refer to Crankshaft Position (CKP) Sensor Replacement-6.5L-L65.
12. Install the right accessory bracket to the engine block. Refer to Accessory Brackets Replacement (Right).
13. Install the left accessory bracket to the engine block. Refer to Accessory Brackets Replacement (Left).





14. Install the engine oil fill tube to the engine front cover.





15. Install the A/C compressor to the left accessory bracket.
16. Connect both the battery negative cables to the batteries. Refer to Battery Replacement.
17. Reset the TDC off set timing procedure. Refer to TDC Offset Adjustment-6.5L-L65.