GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1996 🢒 Cutlass Supreme 🢒 Engine 🢒 Engine Mechanical - 3.8L 🢒 Valve Stem Oil Seal and Valve Spring Replacement

Removal Procedure

Tools Required

  1. J 23590 Spark Plug Port Adapter
  2. J 38606 Valve Spring Compressor
  3. J 41512 Valve Guide Installation Tool
  1. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement and Valve Rocker Arm Cover Replacement .

    2. 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 rocker arm and pedestal. Refer to Valve Rocker Arm and Push Rod Replacement .
  3. Remove the spark plug wires. Refer to Spark Plug Wire Replacement in Engine Electrical.
  4. Remove the spark plug. Refer to Spark Plug Replacement in Engine Electrical.

    5. Object Number: 42226 Size: SH
  5. Install the J 23590 to the spark plug port and apply compressed air in order to hold the valves closed.
  6. Compress the valve spring using the J 38606 .
  7. Remove the valve locks.
  8. Remove the valve spring and cap.
  9. Remove the valve stem oil seal.
  10. Inspect the valve spring for bent, cracked or broken parts. Replace it if damaged.

Installation Procedure

Tools Required

    • J 41512 Valve Guide Installation Tool
    • J 38606 Valve Spring Compressor
    • J 23590 Spark Plug Port Adapter

    Object Number: 42226 Size: SH
  1. Place the oil seal over the stem until the seal begins to contact the valve guide.

    2. Notice: Use hand pressure only when installing the valve stem oil seal using the J 41512. Using too much force may cause damage to the oil seal and possibly lead to excessive oil consumption.

    Important: The color of the replacement seal may not be the same color as the original seal. Install the seals in their correct location based on GM part and package description. Ensure that the seal is fully seated on the valve guide.

  2. Push the valve stem oil seal over the valve guide using the J 41512 .
  3. Compress the valve spring using the J 38606 .
  4. Install the valve spring and cap.
  5. Install the valve locks.
  6. Release the valve spring.

    7. Important: Ensure that the valve keys are seated.

  7. Release the air pressure, and remove the J 23590 .
  8. Install the spark plug. Refer to Spark Plug Replacement in Engine Electrical.
  9. Install the spark plug wire. Refer to Spark Plug Wire Replacement in Engine Electrical.
  10. Install the rocker arm and pedestal. Refer to Valve Rocker Arm and Push Rod Replacement .
  11. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement and Valve Rocker Arm Cover Replacement .