GM Service Manual Online
For 1990-2009 cars only

Valve Rocker Arm Cover Replacement Right

Removal Procedure

Important: Valve rocker arm cover gaskets are reusable. Replace the valve rocker arm cover gasket only if damaged.

    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. Object Number: 236580  Size: SH
  3. Remove the air cleaner outlet duct from the throttle body.

  4. Object Number: 354012  Size: SH
  5. Remove the spark plug wiring harness bracket from the valve rocker arm cover.
  6. Remove the spark plug wires from the spark plug wire harness bracket retainers. Refer to Spark Plug Wire Harness Replacement .

  7. Object Number: 173189  Size: SH
  8. Remove the crankcase vent tube.

  9. Object Number: 18302  Size: SH
  10. Remove the throttle body from the intake manifold. Refer to Throttle Body Assembly Replacement in Engine Controls-7.4L
  11. Remove the throttle body mounting studs from the upper intake manifold.

  12. Object Number: 354010  Size: SH
  13. Remove the valve rocker arm cover bolts.
  14. Remove the valve rocker arm cover from the cylinder head.
  15. Remove the valve rocker arm cover gasket from the cylinder head.

Installation Procedure


    Object Number: 354010  Size: SH
  1. Install the valve rocker cover gasket to the cylinder head.
  2. Install the valve rocker arm cover to the cylinder head.
  3. 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.

  4. Install the valve rocker arm cover bolts.
  5. Tighten
    Tighten the bolts to 12 N·m (106 lb in).

  6. Install the throttle body mounting studs to the upper intake manifold.

  7. Object Number: 18302  Size: SH
  8. Install the throttle body to the upper intake manifold. Refer to Throttle Body Assembly Replacement in Engine Controls-7.4L

  9. Object Number: 173189  Size: SH
  10. Install the crankcase vent tube to the throttle body.

  11. Object Number: 354012  Size: SH
  12. Install the spark plug wiring harness bracket to the valve rocker arm cover.
  13. Install the spark plug wires to the spark plug wiring harness bracket. Refer to Spark Plug Wire Harness Replacement .

  14. Object Number: 236580  Size: SH
  15. Install the air outlet duct to the throttle body.
  16. Connect the battery negative cable to the battery.

Valve Rocker Arm Cover Replacement Left

Removal Procedure

Important: Valve rocker arm cover gaskets are reusable. Replace the valve rocker arm cover gasket only if damaged.

    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.

  2. Object Number: 173187  Size: SH
  3. Remove the PCV valve from the valve rocker arm cover.
  4. Remove the spark plug wires from the spark plug wiring harness bracket. Refer to Spark Plug Wire Harness Replacement .
  5. Remove the bolts from the valve rocker arm cover.

  6. Object Number: 354009  Size: SH
  7. Remove the spark plug wiring harness bracket from the valve rocker arm cover.

  8. Object Number: 354006  Size: SH
  9. Remove the valve rocker arm cover from the cylinder head.
  10. Remove the valve rocker arm cover gasket from the cylinder head.

Installation Procedure


    Object Number: 354006  Size: SH
  1. Install the valve rocker cover gasket to the cylinder head.
  2. Install the valve rocker arm cover to the cylinder head.

  3. Object Number: 354009  Size: SH
  4. Install the spark plug wiring harness bracket.
  5. 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.

  6. Install the valve rocker arm cover bolts.
  7. Tighten
    Tighten the bolts to 12 N·m (106 lb in).


    Object Number: 173187  Size: SH
  8. Install the PCV valve to the valve rocker arm cover.
  9. Install the spark plug wires to the spark plug wiring harness bracket. Refer to Spark Plug Wire Harness Replacement in Engine Electrical.
  10. Connect the battery negative cable to the battery.