Rocker Arm Assembly: Service and Repair

Valve Rocker Arm and Push Rod Replacement

Removal Procedure

Important: Mark, sort, and organize all the components for assembly.





1. Remove the rocker arm cover.
2. Remove the rocker arms.





3. Remove the rocker arm supports.





4. Remove the pushrods.
5. Clean and inspect the rocker arms and/or pushrods, if necessary.

Installation Procedure

Important: Be sure to keep parts in order. Parts must be reinstalled into the original location and position.





1. Install the pushrods.






2. Install the rocker arm supports.

Important:
Be sure that the arrow on the rocker arm support is in the up position.






3. Apply lubricant GM P/N 12345501, (Canadian P/N 992704), or equivalent to the following rocker arm contact surfaces:
^ Pushrod socket (1)
^ Roller pivot (2)
^ Valve stem tip (3)






4. Install the rocker arms as follows:
1. Finger start the bolt at location (1)
2. Finger start the bolt at location (2)
3. Finger start the bolt at location (3)
4. Finger start the remaining rocker arm bolts

Notice:
Refer to Fastener Notice in Service Precautions.






5. Rotate the crankshaft balancer to position the crankshaft balancer alignment mark (1) 57-63 degrees clockwise or counterclockwise from the engine front cover alignment tab (2).

6. Tighten the rocker arm bolts.
^ Tighten bolts to 30 Nm (22 ft. lbs.).

Important:
Once the rocker arms are installed and properly torqued, no additional valve lash adjustment is required.

7. Install the rocker arm cover.