GM Service Manual Online
For 1990-2009 cars only

Object Number: 635934  Size: SH

Warning: Refer to Cleaning Solvent Warning in the Preface section.

Warning: Refer to Safety Glasses and Compressed Air Warning in the Preface section.

       Note: Parts that are to be reused must be marked, sorted, and organized for assembly.

    • Clean the components with cleaning solvent.
    • Dry the components with compressed air.
    • Inspect the valve rocker components for the following:
       - Valve rocker arm valve pushrod socket contact surface (1)
       - The contact surface must be smooth with no scoring or excessive wear.
       - Valve rocker arm roller pivot for binding or damage (2)
       - Valve rocker arm valve stem contact surface (3)
       - The contact surface should be smooth with no scoring or excessive wear.

Object Number: 488857  Size: SH
    • Inspect the valve pushrods for the following:
       - Restriction of the oil passage (1)
       - Wear or scoring of the end contact surfaces (2)
       - The end contact surfaces must be smooth with no scoring or excessive wear.
       - Shaft for bends (3)
       - Roll the valve pushrod on a flat surface to determine if the valve pushrod is bent.