GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Chevy P12 Chassis 🢒 Engine 🢒 Engine Mechanical - 7.4L 🢒 Engine Front Cover Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
  3. Remove the crankshaft position sensor from the engine front cover. Refer to Crankshaft Position Sensor Replacement in Engine Controls.
  4. Remove the crankshaft balancer from the crankshaft. Refer to Crankshaft Balancer Replacement .
  5. Remove the fan shrouds from the radiator. Refer to Fan Shroud Replacement in Engine Cooling.
  6. Remove the fan clutch assembly. Refer to Fan Clutch Replacement in Engine Cooling.
  7. Remove the water pump from the engine block. Refer to Water Pump Replacement in Engine Cooling.
  8. Remove the bolts from the front oil pan and loosen the rear bolts to allow the oil pan to hang from the engine block. Refer to Oil Pan Replacement .

    9. Object Number: 64547 Size: SH
  9. Remove the engine front cover mounting bolts.

    10. Important: The engine front cover gasket is reusable. Replace only if gasket is damaged.

  10. Remove the engine front cover from the engine block.
  11. Remove the crankshaft front cover oil seal.

Installation Procedure

    Object Number: 64547 Size: SH

    Important: The engine front cover gasket is reusable. Replace only if gasket is damaged.

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

    2. 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.

  2. Install the engine front cover bolts.

    3. Tighten
    Tighten the bolts to 12 N·m (106 lb in).


    Object Number: 67878 Size: SH
  3. Install the crankshaft front cover oil seal to the engine front cover.
  4. Install the oil pan to the engine block. Refer to Oil Pan Replacement .
  5. Install the crankshaft position sensor to the engine front cover. Refer to Crankshaft Position Sensor Replacement in Engine Controls.
  6. Install the water pump to the engine block. Refer to Water Pump Replacement in Engine Cooling.
  7. Install the crankshaft balancer to the crankshaft. Refer to Crankshaft Balancer Replacement .
  8. Install the fan clutch assembly. Refer to Fan Clutch Replacement in Engine Cooling.
  9. Install the fan shrouds to the radiator. Refer to Fan Shroud Replacement in Engine Cooling.
  10. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.

    11. Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  11. Connect the negative battery cable.