GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Sonoma Pickup - 2WD 🢒 Engine 🢒 Engine Mechanical - 4.3L 🢒 Valve Rocker Arm and Push Rod Cleaning and Inspection

    Object Number: 4045 Size: SH

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

  1. Mark, sort, and organize the components for assembly.

    2. Caution: Wear safety glasses in order to avoid eye damage.

  2. Clean the components with cleaning solvent.
  3. Dry the components with compressed air.
  4. Inspect the valve rocker arm components for the following:
    5. • Wear or scoring of the valve rocker arm ball area
    • Valve rocker arm pushrod sockets and valve stem contact surfaces
    • The contact surfaces should be smooth with no scoring or excessive wear.
    • Valve rocker arm ball
    • The contact surface must be smooth with no scoring or excessive wear.

    Object Number: 4047 Size: SH
  5. Inspect the valve pushrods for the following:
    6. • Restriction of the oil passage
    • Wear or scoring of the end contact surfaces
    • The end contact surfaces must be smooth with no scoring or excessive wear.
    • Shaft for bends
    • Roll the valve pushrod on a flat surface to determine if the valve pushrod is bent.

    Object Number: 4081 Size: SH
  6. Inspect the valve rocker arm ball studs for unusual wear or damage to the threads.