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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 271 (Engine Mechanical - 4.8L, 5.3L, 6.0L Or 6.2L (4 Of 5)) >> Off-Vehicle Repair Instructions (2 Of 3) >> Valve Lifter and Guide Cleaning and Inspection (RPO LY2/LY6/L92) >> Valve Lifters

Valve Lifters

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    Fig 1: Identifying Valve Lifter Inspection Areas
    GM178485Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Components that are to be used again must be marked, sorted or organized for assembly.
  1. Clean the components in cleaning solvent.
  2. Dry the components with compressed air.
  3. Inspect the valve lifters for the following conditions:
    • Bent or broken clip (1)
    • Worn pushrod 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.