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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1224 (Engine Mechanical - 3.8L (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 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the valve rocker arm cover(s). Refer to Valve Rocker Arm Cover Replacement - Left  or Valve Rocker Arm Cover Replacement - Right .
    IMPORTANT: Rotate the engine so that the piston in the cylinder being worked on is at top dead center before removing the valve locks. This will eliminate the possibility of the valve accidentally falling inside the cylinder.
  2. Remove the valve rocker arm and push rod. Refer to Valve Rocker Arm and Push Rod Replacement .
  3. Remove the spark plug. Refer to SPARK PLUGS .
  4. Install the J 23590  to the spark plug port and apply compressed air in order to hold the valves closed.
    Fig 1: J 23590
    G01703245Courtesy of GENERAL MOTORS CORP.
  5. Install the J 38606  on the valve spring.
    Fig 2: J 23590 & J 38606
    G01703246Courtesy of GENERAL MOTORS CORP.
  6. Compress the valve spring using the J 38606. 
  7. Remove the valve locks.
  8. Remove the valve spring and cap.
    Fig 3: Compressing Valve Spring Using J 38606
    G01703247Courtesy of GENERAL MOTORS CORP.
  9. Remove the valve stem oil seal.
  10. Inspect the valve spring for bent, cracked, or broken parts. Replace the valve spring if damaged. Refer to CYLINDER HEAD CLEANING AND INSPECTION .
    Fig 4: J 23590 & Valve Stem Oil Seal
    G01703248Courtesy of GENERAL MOTORS CORP.
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