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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 LC9/LY5/LMG/L76) >> Active Fuel Management Valve Lifters

Active Fuel Management Valve Lifters

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    Fig 1: Displacement On Demand Valve Lifters Assembly
    GM1402151Courtesy 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. CAUTION: Refer to Safety Glasses and Compressed Air Caution .
  2. Dry the components with compressed air.
  3. Inspect the valve lifters for the following conditions:
    • Broken or collapsed spring (1)
    • Worn pushrod socket (2)
    • Plugged lubrication hole (3)
    • Plugged lifter oil-switching hole (4)
    • Flat spots on the roller (5)
    • Worn or damaged roller bearing (6)

      The roller should rotate freely with no binding or roughness.

    • Scuffed or worn sides (7)
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