Rocker Arm Assembly: Service and Repair

Removal Procedure





1. Disconnect the battery negative cable from the battery. Refer to Battery Negative Cable Disconnect/Connect Procedure.
2. Remove the Engine Cover. Refer to Engine Cover Replacement
3. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement.
4. Remove the valve rocker arm bolt.
5. Remove the valve rocker arm with the ball.
6. 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.
7. Remove the pushrod and the pushrod guide.
8. Store the removed components in order so that the components can be reassembled in the same location.
9. Inspect the valve train components. Refer to Valve Rocker Arm and Push Rods Clean and Inspect.


Installation Procedure

Important: Make sure that the pushrod is properly seated in the valve lifter.





1. Install the valve pushrod and the valve pushrod guide. Seat the valve pushrod 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.

2. Install the valve rocker arm with the ball.

Notice: Refer to Fastener Notice in Service Precautions.

3. Install the valve rocker arm bolt.
^ Tighten the bolt to 61 Nm (45 ft. lbs.).





4. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement.
5. Connect the battery negative cable from the battery. Refer to Battery Negative Cable Disconnect/Connect Procedure.
6. Install the Engine Cover. Refer to Engine Cover Replacement