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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1354 (Engine Mechanical - 4.8L, 5.3L & 6.0L) >> 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 Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. 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: Spark Plug Wires
    G02106670Courtesy 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: Spark Plug
    G02106671Courtesy 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 J 22794 (Spark Plug Port Adapter)
    G02106672Courtesy of GENERAL MOTORS CORP.
  9. Use the J 38606  in order to compress the valve spring.
    Fig 4: J 38606 & J 22794
    G02106673Courtesy 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: Valve Stem Keys, Valve Spring, Cap, Valve Stem Oil Seal & Shim
    G02106674Courtesy of GENERAL MOTORS CORP.
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