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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1018 (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 2004 GMC Sierra and 2004 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 Replacement in Engine Controls - 4.3L.
  3. Install the J 22794  into the spark plug hole.
    4. Fig 1: Installing J 22794 Into Spark Plug Hole
    GM476770Courtesy of GENERAL MOTORS CORP.
  4. Connect a shop air supply hose and apply compressed air in order to hold the valves in place.
  5. Install a flat washer onto the removed rocker arm bolt.
  6. Install the bolt and rocker arm for the valve spring requiring removal.
    7. 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. Hook the slotted end of J 5892-D  under the washer on the rocker arm bolt.
    2. Apply steady pressure on the valve spring cap until the valve keys are accessible.
    8. Fig 2: Installing J 5892-D Under The Washer On The Rocker Arm Bolt
    GM476767Courtesy 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.
    9. Fig 3: Compress The Valve Spring (Cylinder Head Installed) Using Special Tools
    GM218211Courtesy 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).
    14. Fig 4: Identifying Valve Components
    GM480555Courtesy of GENERAL MOTORS CORP.
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