LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Astro Van Passenger, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 829 (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 Safari and 2003 Chevrolet Astro. 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 ENGINE CONTROLS - REMOVAL & INSTALLATION in Engine Performance.
  4. Install the J 22794  into the spark plug hole.
    Fig 1: Installing J 22794 Into Spark Plug Hole
    G01643684Courtesy of GENERAL MOTORS CORP.
  5. Connect a shop air supply hose and apply compressed air in order to hold the valves in place.
  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: Installing Valve Spring Compressor (J 5892-D)
  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
    G01643685Courtesy 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: Removing Valve Spring With SST
    G01643686Courtesy of GENERAL MOTORS CORP.
  11. Remove the valve keys (1).
  12. Carefully release the valve spring tension.
  13. Remove the J 5892-D  or J 38606. 
  14. Remove the valve spring cap (2) and valve spring (3).
  15. Remove the valve stem oil seal (4).
    Fig 4: Removing Valve Key, Valve Spring Cap, Valve Spring And Valve Stem Oil Seal
    G01643687Courtesy of GENERAL MOTORS CORP.
scientia non olet · About LEMON Manuals