For 1990-2009 cars

## Valve Rocker Arm Cover Replacement Left Side

### Removal Procedure

1. Disconnect the negative battery cable. Refer to

   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.

   in General Information.
2. Partially drain the cooling system. Refer to Draining, Flushing and Filling the Cooling System in Cooling and Radiator.
3. Remove the coolant by-pass pipe from the coolant pump and the exhaust manifold. Refer to Cooling and Radiator.
4. Remove the PCV valve from the valve rocker cover.
5. Remove the valve rocker cover bolts.
6. Remove the valve rocker cover.

Bump the end of the valve rocker cover with the palm of your hand or a soft rubber mallet if the cover adheres to the cylinder head.

7. Clean the sealing surface on the cylinder head and the valve rocker cover with degreaser.

### Installation Procedure

1. Install a new gasket and new bolt grommets to the valve rocker cover. Ensure that the gasket is seated properly in the valve groove.
2. Apply sealer in the notch on the cover. Use GM P/N 1052917 or its equivalent.
3. Install the valve rocker cover.
4. Install the valve rocker cover bolts.

Tighten
Tighten the bolts to 10 N·m (89 lb in) + 30 degrees.

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 PCV valve to the valve rocker cover.
6. Install the coolant bypass pipe to the to the coolant pump and the manifold. Refer to Cooling and Radiator.
7. Fill the cooling system. Refer to Draining, Flushing and Filling the Cooling System in Cooling and Radiator.
8. Connect the negative battery cable.

## Valve Rocker Arm Cover Replacement Right Side

### Removal Procedure

1. Disconnect the negative battery cable. Refer to

   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.

   in General Information.
2. Remove the rear ignition wire harness at the upper intake manifold and at the spark plugs.
3. Remove the brake booster vacuum supply at the upper intake manifold.
4. Remove the drive belt. Refer to Drive Belt Replacement .
5. Remove the generator. Support the generator. Refer to Generator in Charging System.
6. Remove the following components:

• | Electronic ignition coil and module assembly

• | EVAP canister purge solenoid

7. Remove the valve rocker cover bolts.
8. Remove the valve rocker cover.

Bump the end of the valve rocker cover with the palm of your hand or a soft rubber mallet if the cover adheres to the cylinder head.

9. Clean the sealing surface on the cylinder head and the valve rocker cover with degreaser.

### Installation Procedure

1. Install a new gasket and new bolt grommets to the valve rocker cover. Ensure that the gasket is seated properly in the valve groove.
2. Apply sealer in the notch on the cover. Use GM P/N 1052917 or its equivalent.
3. Install the valve rocker cover.
4. Install the valve rocker cover bolts.

Tighten
Tighten the bolts to 10 N·m (89 lb in).

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 generator. Refer to Generator in Charging System.
6. Install the drive belt. Refer to Drive Belt Replacement .
7. Install the brake booster vacuum supply line.
8. Install the following components:

• | EVAP canister purge solenoid

• | Electronic ignition coil and module assembly

9. Install the rear ignition wire harness.
10. Connect the negative battery cable.