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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 885 (Engine Mechanical - 4.3L (LU3)) >> 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 Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the valve rocker arm cover.
  2. Remove the required valve rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement  .
  3. Remove the required spark plugs. Refer to SPARK PLUGS in Service & Adjustment Specifications in Engine Performance.
  4. Install the J 22794  into the spark plug hole.
  5. Connect a shop air supply hose and apply compressed air in order to hold the valves in place.
    Fig 1: Installing J22794
    G01977488Courtesy of GENERAL MOTORS CORP.
  6. Remove a bolt from a valve rocker arm.
  7. Install a flat washer on the bolt.
  8. Install the bolt in the valve rocker arm bolt hole for the valve spring requiring removal.
    CAUTION: Compressed valve springs have high tension against the valve spring compressor. Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force. Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys. Falling to use care may cause personal injury.
  9. Use the J 5892-D  in order to compress the valve spring.
    1. 9.1. Hook the slotted end of J 5892-D  under the washer on the valve rocker arm bolt.
    2. 9.2. Apply steady pressure on the valve spring cap until the valve keys are accessible.
      Fig 2: Using J 5892-D
      G01977489Courtesy of GENERAL MOTORS CORP.
    NOTE: Completely engage the J 38606 jaws on the valve spring. The J 38606 may slip off and scratch the valve spring. Replace the valve spring if the valve spring becomes scratch.
  10. Use J 38606  when J 5892-D  will not fit.
    Fig 3: Using J 38606 In Place of J 5892-D
    G01977490Courtesy of GENERAL MOTORS CORP.
  11. Remove the valve keys (1).
  12. Carefully release the valve spring tension.
  13. Remove the J 5892-D  or the J 38606  .
  14. Remove the valve spring cap (2) and valve spring (3).
  15. Remove the valve stem oil seal (4).
    Fig 4: Identifying Valve Keys, Spring, Spring Cap, & Oil Seal
    G01977491Courtesy of GENERAL MOTORS CORP.
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