GM Service Manual Online
For 1990-2009 cars only

    Caution: Bodily injury may occur if the cleaning solvent is inhaled or exposed to the skin.

  1. Clean the valve lifters in cleaning solvent.
  2. Caution: Wear safety glasses in order to avoid eye damage.

  3. Dry the valve lifters with compressed air.

  4. Object Number: 178485  Size: SH
  5. Inspect the valve lifters for the following:
  6. • Bent or broken clip (1)
    • Worn push rod socket (2)
    • Scuffed or worn sides (3)
    • If the valve lifter shows wear, inspect the engine block lifter bores for wear or damage.
    • Flat spots on the roller (4)
    • Loose or damaged pin (5)
    • Plugged oil hole (6)
    • Worn or damaged roller bearing
    • The roller should rotate freely with no binding or roughness.

    Object Number: 645877  Size: SH
  7. Inspect the valve lifter guides for the following:
  8. • For cracks or damage
    • Excessive wear in the lifter mounting bores