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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1496 (Engine Mechanical - 5.3L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Valve Stem Oil Seal and Valve Spring Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the valve rocker arm. Refer to VALVE ROCKER ARM AND PUSH ROD REPLACEMENT   . 
  2. Disconnect the spark plug wire at the spark plug.
    • Twist each plug wire boot 1/2 turn.
    • Pull only on the boot in order to remove the wire from the spark plug.
      Fig 1: Removing Spark Plug Wire From Spark Plug
      G02129144Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Remove the spark plugs from the cylinder head with the engine at room temperature.
  3. Loosen the spark plug 1 or 2 turns.
  4. Brush or air blast away any dirt or debris from around the spark plug.
  5. Remove the spark plug.
    Fig 2: Removing Spark Plug
    G02129145Courtesy of GENERAL MOTORS CORP.
  6. Install J 22794  into the spark plug hole.
  7. Attach an air hose to J 22794. 
  8. Apply compressed air to J 22794  in order to hold the valves in place.
    Fig 3: Installing Spark Plug Port Adapter Into Spark Plug Hole
    G02129146Courtesy of GENERAL MOTORS CORP.
  9. Use J 38606  in order to compress the valve spring.
    Fig 4: Compressing Valve Spring Using SST
    G02129147Courtesy of GENERAL MOTORS CORP.
  10. Remove the valve stem keys (2).
  11. Carefully release the valve spring tension.
  12. Remove the J 38606. 
  13. Remove the valve spring cap (3).
  14. Remove the valve spring (4).
  15. Remove the valve stem oil seal and shim (1, 5).
    Fig 5: Removing Valve Stem Oil Seal And Shim
    G02129148Courtesy of GENERAL MOTORS CORP.
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