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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1121 (Engine Mechanical - 3.4L) >> Repair Instructions >> Off-Vehicle 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 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
    CAUTION: Refer to Cleaning Solvent Caution in Cautions and Notices.
  1. Clean the valve rocker arms and push rods in cleaning solvent.
    2. CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
  2. Dry the valve rocker arms and push rods with compressed air.
    3. Fig 1: Identifying Valve Rocker Arm
    GM186991Courtesy of GENERAL MOTORS CORP.
  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
    4. Fig 2: Inspecting Push Rods
    GM186986Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Keep the push rods in order. The intake and exhaust are different lengths.
  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)
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