For 1990-2009 cars

### Removal Procedure

1. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
2. Remove the rocker arm bolts.
3. Remove the rocker arms.

Important: Place the valve train parts in a rack in order to ensure that they are installed in the same location from which they were removed. Intake pushrods measure 144.18 mm (5.68 in). Exhaust pushrods measure 152.51 mm (6.0 in).

Important: Use care when removing the pushrods. Ensure that they do not fall down into the lifter valley.

4. Remove the pushrods.

### Installation Procedure

Important: Coat the bearing surface of the rocker arms, rocker arm bolts, and pushrods with GM P/N 1052365 or its equivalent. Install all of the components in their original location.

1. Use the following steps in order to install the pushrods.

• | Coat the ends of the pushrods with prelube GM P/N 1052365 or equivalent.

• | The intake valve pushrods measure 144 mm (5.75 in) long.

• | Exhaust valve pushrods measure 152.5 mm (6.0 in) long.

2. Install the rocker arms.

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 rocker arm bolt.

Tighten
Tighten the bolt to 10 N·m (89 lb in) plus 30°.

4. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .