GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Express 🢒 Engine 🢒 Engine Mechanical - 8.1L 🢒 Valve Rocker Arm Cover Replacement - Right Side

Removal Procedure

    Object Number: 748488 Size: SH
  1. Remove the oil level indicator.
  2. Remove the upper oil level indicator tube bolt.
  3. Remove the upper oil level indicator tube.

    4. Object Number: 748489 Size: SH
  4. Remove the transmission fluid indicator.
  5. Remove the oil fill tube bolt.
  6. Remove the upper transmission fluid indicator tube.
  7. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.

    8. Object Number: 748480 Size: SH
  8. Disconnect the following electrical connectors:
    9. • Ignition coil harness (2)
    • Engine coolant temperature (ECT) sensor (3)

    Object Number: 742645 Size: SH
  9. Remove the ECT sensor bracket bolt.
  10. Reposition the ECT sensor bracket.
  11. Disconnect the vacuum hose from the rear of the intake manifold.

    12. Object Number: 470704 Size: SH

    Important: Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug wire or the wire could be damaged.

  12. Remove the spark plug wires from the ignition coils.

    13. Object Number: 745856 Size: SH
  13. Remove the ignition coil wiring harness bolts. (left side shown, right side similar).

    14. Object Number: 470897 Size: SH
  14. Remove the valve rocker arm cover bolts.
  15. Remove the valve rocker arm cover.

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

  16. Inspect the valve rocker arm cover gasket for cuts or damage.

Installation Procedure

    Object Number: 470897 Size: SH
  1. Install a new valve rocker arm cover gasket if the gasket was removed form the rocker arm cover.
  2. Install the valve rocker arm cover.
  3. Install the valve rocker arm cover bolts.

    4. Object Number: 677858 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.

  4. Tighten the valve rocker arm cover bolt in sequence using two passes.

    5. Tighten

    1. Tighten the valve rocker arm cover bolts to 6 N·m (53 lb in) a first pass.
    2. Tighten the valve rocker arm cover bolts to 12 N·m (106 lb in) a final pass.

    Object Number: 745856 Size: SH
  5. Install the ignition coil wiring harness bolts. (left side shown, right side similar).

    6. Tighten
    Tighten the ignition coil wiring harness bolts to 12 N·m (106 lb in).


    Object Number: 470704 Size: SH

    Important: Fully install the spark plug wires by pushing on the exposed end of the spark plug boot. Do not push the spark plug wire on the spark plug by using the metal heat shield.

  6. Install the spark plug wires to the ignition coils.

    7. Object Number: 742645 Size: SH
  7. Connect the vacuum hose to the rear of the intake manifold.
  8. Position the ECT sensor bracket into place.
  9. Install the ECT sensor bracket bolt.

    10. Tighten
    Tighten the ECT sensor bracket bolt to 50 N·m (37 lb ft).


    Object Number: 748480 Size: SH
  10. Connect the following electrical connectors:
    11. • Ignition coil harness (2)
    • ECT sensor (3)
  11. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.

    12. Object Number: 748489 Size: SH
  12. Apply sealant GM U.S. P/N 12346004, Canada P/N 10953480, or equivalent to the upper transmission fluid indictor tube.
  13. Install the upper transmission fluid indicator tube.
  14. Install the upper transmission fluid fill tube bracket bolt.

    15. Tighten
    Tighten the oil fill tube bracket bolt to 12 N·m (106 lb in).

  15. Install the transmission fluid indicator.

    16. Object Number: 748488 Size: SH
  16. Apply sealant GM U.S. P/N 12346004, Canada P/N 10953480, or equivalent to the upper oil level indicator tube.
  17. Install the upper oil level indicator tube.
  18. Install the upper oil level indicator tube bracket bolt.

    19. Tighten
    Tighten the upper oil level indicator tube bracket bolt to 12 N·m (106 lb in).

  19. Install the oil level indicator.

    20. Object Number: 712022 Size: SH
  20. Install the air cleaner duct (3).
  21. Position and tighten the clamps (2) at the throttle body (1) and air cleaner.

    22. Tighten
    Tighten the air cleaner duct clamps to 4 N·m (35 lb in).