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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1353 (Engine Mechanical - 4.3L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Valve Lifter Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the intake manifold. Refer to Intake Manifold Replacement - Lower .
  2. Remove the pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
    IMPORTANT: Place the components in a rack so that the components can be installed to their original location.
  3. Remove the bolts and lifter pushrod guide.
    Fig 1: Lifter Pushrod Guide
    G02105878Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Place the valve lifters in the rack in the upright position in order to maintain the oil inside the valve lifters.
  4. Remove the lifters.
    Fig 2: Valve Lifters
    G02105879Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Some valve lifters may be stuck in the valve lifter bores because of gum or varnish deposits and may require the use of J 3049-A  for removal.
  5. Use the J 3049-A  in order to remove the stuck valve lifters.
  6. Use a cleaning solvent and a shop towel to clean any varnish from the valve lifter bores.
  7. Inspect the lifter bores for excessive wear or scoring. Replace the engine block if there is excessive wear or deep scoring.
  8. Inspect the camshaft for wear or damage. If the wear is questionable remove the camshaft and inspect. Refer to Camshaft and Bearings Cleaning and Inspection .
  9. Clean and inspect the lifters, if necessary. Refer to Valve Lifters and Guides Cleaning and Inspection .
    Fig 3: Remove Stuck Valve Lifters Using J 3049-A
    G02105880Courtesy of GENERAL MOTORS CORP.
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