For 1990-2009 cars

### Removal Procedure

1. Remove the lower intake manifold. Refer to Intake Manifold Replacement .
2. Remove the valve rocker arms and the pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
3. Loosen the valve lifter guide bolts.
4. Remove the valve lifter guide (1).
5. Remove the valve lifters (2).

### Installation Procedure

Important: Coat the valve lifters with prelube, GM P/N 12345501 or equivalent prior to installation.

1. Install the valve lifters (1).
2. Install the valve lifter guide (2).

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.

3. Tighten the valve lifter guide bolts.

Tighten
Tighten the valve lifter guide bolts to 30 N·m (22 lb ft).

4. Install the lower intake manifold. Refer to Intake Manifold Replacement .
5. Install the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .