Removal Procedure
- Open the hood.
- Disconnect the battery negative cable from the battery. Refer to Battery Cable Replacement in Engine Electrical.
- Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
- Remove the valve rocker arm bolt.
- Remove the valve rocker arm with the ball.
- If the pushrod is the only component to be replaced, back the valve rocker arm bolt off until the valve rocker arm can be swung away from the pushrod. Pull the pushrod out.
- Remove the pushrod and the pushrod guide.
- Store the removed components in order so that the components can be reassembled in the same location.
- Inspect the valve train components. Refer to Valve Rocker Arm and Push Rods Clean and Inspect .
Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.
Installation Procedure
- Install the valve pushrod and the valve pushrod guide. Seat the valve pushrod in the valve lifter.
- Install the valve rocker arm with the ball.
- Install the valve rocker arm bolt.
- Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
- Connect the battery negative cable from the battery. Refer to Battery Cable Replacement .
- Close the hood.
Important: Make sure that the pushrod is properly seated in the valve lifter.
Important: When new valve rocker arms and/or balls are installed, coat their bearing surfaces with high viscosity oil with zinc GM P/N 12345501 or equivalent.
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.
Tighten
Tighten the bolt to 54 N·m (40 lb ft).
