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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1443 (Engine Mechanical - 4.2L (Ll8)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Valve Rocker Arm and Valve Lash Adjuster Cleaning and Inspection

Valve Rocker Arm and Valve Lash Adjuster Cleaning and Inspection

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    Fig 1: Identifying Valve Rocker Arms
    GM637697Courtesy of GENERAL MOTORS CORP.
  1. Clean the valve rocker arms and valve lash adjusters in cleaning solvent.
  2. Dry the valve rocker arms and valve lash adjusters with compressed air.
  3. Inspect the valve rocker arms for the following conditions:
    • Excessive wear at the valve contact or valve lash adjuster socket area
    • A loose or damaged pin
    • A worn or damaged roller. The roller should rotate freely with no binding or roughness.
    4. Fig 2: Identifying Valve Lash Adjusters
    GM637696Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Keep the valve rocker arms and valve lash adjusters in the order from where they where removed.
  4. Inspect the valve lash adjusters for the following conditions:
    • Excessive wear
    • Clogging of the oil passage
    • Damage
    • Collapsed or spongy
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