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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1618 (Engine Mechanical - 4.3L) >> 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 Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the required valve rocker arms. Refer to Valve Rocker Arm and Push Rod Replacement .
  2. Remove the required spark plugs. Refer to SPARK PLUG .
  3. Install the J 22794  into the spark plug hole.
  4. Connect a shop air supply hose and apply compressed air in order to hold the valves in place.
    5. Fig 1: J 22794 (Spark Plug Port Adapter)
    G02105868Courtesy of GENERAL MOTORS CORP.
  5. Install a flat washer onto the removed rocker arm bolt.
  6. Install the bolt and rocker arm 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. Failing to use care may cause personal injury.
  7. Using J 5892-D  compress the valve spring.
    1. 7.1. Hook the slotted end of J 5892-D  under the washer on the rocker arm bolt.
    2. 7.2. Apply steady pressure on the valve spring cap until the valve keys are accessible.
    Fig 2: Compress Valve Spring Using J 5892-D
    G02105869Courtesy 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.
  8. Use J 38606  when J 5892-D  will not fit.
    Fig 3: J 22794 (Spark Plug Port Adapter) & J 38606 (Valve Spring Compressor)
    G02105870Courtesy of GENERAL MOTORS CORP.
  9. Remove the valve keys (1).
  10. Carefully release the valve spring tension.
  11. Remove the J 5892-D  or the J 38606  .
  12. Remove the valve spring cap (2) and valve spring (3).
  13. Remove the valve stem oil seal (4).
    Fig 4: Valve Keys, Valve Spring Cap, Valve Spring & Valve Stem Oil Seal
    G02105871Courtesy of GENERAL MOTORS CORP.
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