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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.3L (On-Vehicle) >> Repair Instructions >> Valve Stem Oil Seal and Valve Spring Replacement >> Removal Procedure

Removal Procedure

  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.
  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: J 22794 In Spark Plug Hole
    G01661116Courtesy 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. Failing 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: Compressing Valve Spring Using J 5892-D
    G01661117Courtesy 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: Engaging J 38606 Jaws On Valve Spring
    G01661118Courtesy 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: Valve Keys, Valve Spring Cap, Valve Spring & Valve Stem Oil Seal
    G01661119Courtesy of GENERAL MOTORS CORP.
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