Removal Procedure

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.

1. Remove the right or the left valve rocker cover. Refer to Valve Rocker Arm Cover Replacement - Right  or Valve Rocker Arm Cover Replacement - Left 
2. Remove the valve rocker arm and push rod. Refer to Valve Rocker Arm and Push Rod Replacement 
3. Remove the spark plug(s) from the cylinder(s) that is being serviced. 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: Holding The Valves Closed

   Courtesy of GENERAL MOTORS CORP.
5. Install the J 38606 on the valve spring.
   Fig 2: Install The J 38606 On The Valve Spring

   Courtesy 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: Valve Spring

   Courtesy 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: Valve Stem Oil Seal

    Courtesy of GENERAL MOTORS CORP.