For 1990-2009 cars

### Removal Procedure

1. Remove the rocker arm covers and gaskets. Refer to Valve Rocker Arm Cover Replacement .
2. Remove the lower intake manifold and gaskets. Refer to Intake Manifold Replacement .

Important: Keep all of the valve train parts in order. Reinstall the valve train parts in their original locations and with the same mating surfaces as when removed.

3. Remove the rocker arms, pushrods, and the pedestals. Refer to Valve Rocker Arm and Push Rod Replacement .
4. Remove the valve guide retainer bolts.
5. Remove the retainer.
6. Remove the lifter guides.
7. Remove the valve lifters.
8. Clean and inspect the following components:

• | All gasket surfaces (with degreaser)

• | Valve train parts

• | Lifters (for wear)

• | Cam lobes (for wear)

### Installation Procedure

1. Dip the valve lifters in prelube GM P/N 12345501 or the equivalent.
2. Install the valve lifters.
3. Install the valve lifter guides.
4. Install the guide retainer.
5. Install the guide retainer bolts.

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

Refer to

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.

in General Information.
6. Install the rocker arms, pushrods, and the pedestals. Refer to Valve Rocker Arm and Push Rod Replacement .
7. Install the lower intake manifold and gaskets. Refer to Intake Manifold Replacement .
8. Install the rocker arm covers and gaskets. Refer to Valve Rocker Arm Cover Replacement .