Valve Rocker Arm and Push Rods Cleaning and Inspection

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

1. Mark, sort, and organize the components for assembly.
   CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.
2. Clean the components with cleaning solvent.
3. Dry the components with compressed air.
4. Inspect the valve rocker arm 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.

   • Valve rocker arm bolt threads for damage (4)
   Fig 1: Cleaning Valve Rocker Arm

   Courtesy of GENERAL MOTORS CORP.
5. 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.

   Fig 2: Inspecting Valve Pushrods

   Courtesy of GENERAL MOTORS CORP.
6. Inspect the valve rocker support for excessive wear or damage.
   Fig 3: Inspecting Valve Rocker

   Courtesy of GENERAL MOTORS CORP.