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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 556 (Engine Mechanical - 3.1L V6 - VIN (J) Unit Repair) >> Repair Instructions >> Valve Rocker Arm and Push Rods Cleaning and Inspection

Valve Rocker Arm and Push Rods Cleaning and Inspection

WARNING: This page is about a different car, the 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clean the valve rocker arms and push rods in cleaning solvent.
  2. Dry the valve rocker arms and push rods with compressed air.
  3. Inspect the valve rocker arms for the following conditions:
    • Excessive wear at the valve contact or push rod socket area (1)
    • A loose or damaged pin (2)
    • A worn or damaged roller bearing (2)
    • The roller should rotate freely with no binding or roughness.
    • The bolt threads for damage
      • Fig 1: Valve Rocker Arm and Push Rods
      G01763836Courtesy of GENERAL MOTORS CORP.
    NOTE: Keep the push rods in order. The intake and exhaust are different lengths. Exhaust is green, intake is yellow.
  4. Inspect the push rods for the following conditions:
    • Straightness using a straight edge (1)
    • Excessive wear on the push rod ends (3)
    • Clogging of the oil passage (2)
    Fig 2: Inspecting The Pushrods
    G01763837Courtesy of GENERAL MOTORS CORP.
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