GM Service Manual Online
For 1990-2009 cars only

Valve Rocker Arm Cover Replacement Left

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 battery negative cable.

  2. Object Number: 176070  Size: SH
  3. Disconnect the spark plug wires from the spark plugs. Refer to Spark Plug Wire Harness Replacement in Engine Electrical.
  4. Disconnect the wiring harness from the clips, and move the harness aside.

  5. Object Number: 179249  Size: SH
  6. Remove the air conditioning compressor, if equipped, and lay the A/C compressor aside. Refer to Air Conditioning Compressor Replacement in HVAC.

  7. Object Number: 173206  Size: SH
  8. Remove the exhaust gas recirculation (EGR) pipe from the intake and exhaust manifolds.

  9. Object Number: 317197  Size: SH
  10. Remove the PCV and the hose.
  11. Remove the vacuum brake booster pipe, if equipped, and move it aside.

  12. Object Number: 341228  Size: SH
  13. Remove the AIR check valve crossover pipe, if equipped.

  14. Object Number: 68709  Size: SH
  15. Remove the valve rocker arm cover and the gasket. Refer to Valve Rocker Arm Cover Removal (Left) .
  16. Clean all traces of old gasket from the valve rocker arm cover and the cylinder head. Refer to Valve Rocker Arm Cover Clean and Inspect .

Installation Procedure


    Object Number: 68709  Size: SH
  1. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Installation (Left) .

  2. Object Number: 179249  Size: SH
  3. Remove the air conditioning compressor. Refer to Air Conditioning Compressor Replacement in HVAC.
  4. 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.


    Object Number: 173206  Size: SH
  5. Install the exhaust gas recirculation (EGR) pipe to the intake and exhaust manifolds.
  6. Tighten

    1. Tighten the EGR valve inlet pipe intake manifold nut to 25 N·m (18 lb ft).
    2. Tighten the EGR valve inlet pipe exhaust manifold nut to 30 N·m (22 lb ft).
    3. Tighten the EGR valve inlet pipe clamp bolt to 25 N·m (18 lb ft).

    Object Number: 317197  Size: SH
  7. Install the PCV and the hose.
  8. Install the vacuum brake booster pipe.

  9. Object Number: 341228  Size: SH
  10. Install the AIR check valve crossover pipe, if equipped.
  11. Install the wiring harnesses to the valve rocker arm cover clips.
  12. Install the spark plug wires. Refer to Spark Plug Wire Harness Replacement in Engine Electrical.
  13. Connect the battery negative cable. Refer to Battery Cable Replacement in Engine Electrical.

Valve Rocker Arm Cover Replacement Right

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 battery negative cable. Refer to Battery Cable Replacement in Engine Electrical.
  2. Remove the PCV tube from the air cleaner outlet duct.
  3. Remove the air cleaner outlet duct from the throttle body. Refer to Air Cleaner Outlet Duct Replacement in Engine Controls.

  4. Object Number: 176070  Size: SH
  5. Disconnect the spark plug wires from the spark plugs. Refer to Spark Plug Wire Harness Replacement in Engine Electrical.
  6. Disconnect the wiring harness from the clips, and move the harness aside.

  7. Object Number: 173191  Size: SH
  8. Remove the PCV tube.
  9. Remove the upper oil level indicator tube and bolt.

  10. Object Number: 345189  Size: SH
  11. Remove the bolt and oil level indicator tube bracket.
  12. Remove the oil fill tube to air outlet duct bracket bolt.
  13. Remove the oil fill tube from the valve rocker arm cover.

  14. Object Number: 341228  Size: SH
  15. Remove the AIR check valve crossover pipe, if equipped.

  16. Object Number: 68709  Size: SH
  17. Remove the valve rocker arm cover and the gasket. Refer to Valve Rocker Arm Cover Removal (Right) .
  18. Clean all traces of old gasket from the valve rocker arm cover and the cylinder head. Refer to Valve Rocker Arm Cover Clean and Inspect .

Installation Procedure


    Object Number: 68709  Size: SH
  1. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Installation (Right) .

  2. Object Number: 173191  Size: SH
  3. Install the PCV tube.

  4. Object Number: 345189  Size: SH

    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 oil level indicator tube bracket and bolt. Refer toOil Level Indicator and Tube Installation .
  6. Install the upper oil level indicator tube and bolt.
  7. Tighten
    Tighten the bolt to 25 N·m (18 lb ft).

  8. Install the oil fill tube to the valve rocker arm cover.
  9. Install the oil fill tube to air outlet duct bracket bolt.
  10. Tighten
    Tighten the bolt to 25 N·m (18 lb ft).


    Object Number: 341228  Size: SH
  11. Install the AIR check valve crossover pipe, if equipped.
  12. Install the wiring harnesses to the valve rocker arm cover clips.
  13. Install the spark plug wires. Refer to Spark Plug Wire Harness Replacement in Engine Electrical.
  14. Install the air cleaner outlet duct to the throttle body. Refer to Air Cleaner Outlet Duct Replacement in Engine Controls.
  15. Install the PCV tube to the air cleaner outlet duct.
  16. Connect the battery negative cable. Refer to Battery Cable Replacement in Engine Electrical.