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Home >> Buick >> 2009 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 5.3L) >> Repair Instructions - Off Vehicle >> Valve Lifter and Guide Cleaning and Inspection (5.3L) >> Active Fuel Management Valve Lifters

Active Fuel Management Valve Lifters

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Displacement On Demand Valve Lifters Assembly
    GM1402151Courtesy of GENERAL MOTORS CORP.
    NOTE: Components that are to be used again must be marked, sorted or organized for assembly.
  1. Clean the components in cleaning solvent.
  2. WARNING: Refer to Safety Glasses Warning .
  3. Dry the components with compressed air.
  4. 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)