Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

1. Disconnect the battery negative cable from the battery. Refer to Battery Cable Replacement in Engine Electrical.
2. Remove the fan shroud from the radiator. Refer to Fan Shroud Replacement (Lower VIN 1) in Engine Cooling.
3. Remove the drive belt from the vehicle. Refer to Drive Belt Replacement .
4. Raise the vehicle and support with safety stands. Refer to Lifting and Jacking the Vehicle in General Information.



5. Remove the crankshaft balancer from the crankshaft. Refer to Crankshaft Balancer Replacement .



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



7. Remove the water pump from the engine block. Refer to Water Pump Removal .



8. Remove the bolts from the engine front cover to the oil pan.

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

9. Remove the fuel line clips from the studs.



10. Remove the fuel injection drive gear from the camshaft.

•	For the L65, refer to Fuel Injection Pump Replacement

•	For the L57 (MFI), refer to Fuel Injection Pump Replacement (MFI)

•	For the L57 (EFI), refer to Fuel Injection Pump Replacement (EFI)




11. Remove the inner engine front cover bolts.



12. Remove the engine front cover bolts from the engine front cover.



13. Remove the engine front cover from the engine block.
14. Remove the crankshaft front cover oil seal. Refer to Crankshaft Front Oil Seal Replacement .

Tools Required

J 22102 Seal Installer

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



2. Apply a 2 mm (3/32 in) bead of anaerobic sealant GM P/N 1052357 to the engine front cover.
3. Apply a 5 mm (3/16 in) 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.




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

5. Install the engine front cover mounting bolts.

Tighten
Tighten the bolts and studs to 45 N·m (33 lb ft).




6. Install the fuel injection pump mounting bolts.



7. Install the fuel pump drive gear to the camshaft and align the timing marks.

•	For the L65, refer to Fuel Injection Pump Replacement

•	For the L57 (MFI), refer to Fuel Injection Pump Replacement (MFI)

•	For the L57 (EFI), refer to Fuel Injection Pump Replacement (EFI)




8. Install the water pump to the engine block. Refer to Water Pump Installation .

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.

9. Install the fuel return line clips.



10. Install the crankshaft position sensor to the engine front cover.



11. Install the crankshaft balancer to the crankshaft. Refer to Crankshaft Balancer Replacement .
12. Remove the safety stands and lower the vehicle.
13. Install the drive belt to the vehicle. Refer to Drive Belt Replacement .
14. Install the fan shroud to the radiator. Refer to Fan Shroud Replacement (Lower VIN 1) .
15. Connect the battery negative cables to the battery. Refer to Battery Cable Replacement .
16. Reset the fuel injection pump timing.

•	For the L65, refer to Fuel Injection Pump Replacement

•	For the L57 (MFI), refer to Fuel Injection Pump Replacement (MFI)

•	For the L57 (EFI), refer to Fuel Injection Pump Replacement (EFI)