GM Service Manual Online
For 1990-2009 cars only
  1. Clean the valve lifters in cleaning solvent.
  2. Warning: Refer to Safety Glasses Warning in the Preface section.

  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: 347332  Size: SH
  7. Inspect the valve lifter guides for the following:
  8. • For cracks or damage
    • Excessive wear in the lifter mounting bores