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

Removal Procedure

    Object Number: 748484 Size: SH
  1. Remove the engine cover. Refer to Engine Cover Replacement in Interior Trim.
  2. Disconnect the Ignition coil harness electrical connector (1).

    3. Object Number: 745856 Size: SH
  3. Remove the ignition coil wiring harness bolts.

    4. Object Number: 470666 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.

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

    5. Object Number: 470890 Size: SH
  5. Remove the valve rocker arm cover bolts.
  6. Remove the valve rocker arm cover.

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

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

Installation Procedure

    Object Number: 470890 Size: SH
  1. Install a new valve rocker arm cover gasket if the gasket was removed from 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 bolts 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: 470666 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 to the spark plug by using the metal heat shield.

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

    6. Object Number: 745856 Size: SH
  6. Install the ignition coil wiring harness bolts.

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


    Object Number: 748484 Size: SH
  7. Connect the ignition coil harness electrical connector (1).
  8. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.