For 1990-2009 cars

### Removal Procedure

Valve lifters should be kept in order so they may be installed in their original position.

If the lifters are removed, they must be installed in their original location. If replacement is necessary, use the lifters with a narrow flat ground along the lower 3/4 of the lifter. These flats provide additional oil to the cam lobe and the lifter surfaces. Oversized lifters are available for service.

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

### Installation Procedure

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.

1. Install the valve lifters

Important: Whenever new valve lifters are being installed, coat the foot of the valve lifters with camshaft and lifter prelube, GM P/N 1052365 or equivalent.

2. Install the lifter guide 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.

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