Valve Stem Oil Seal and Valve Spring Replacement

Removal Procedure

^ Tools Required
- J 23590 Spark Plug Port Adapter
- J 38606 Valve Spring Compressor





1. Remove the valve rocker arm and push rod. Refer to Valve Rocker Arm and Push Rod Replacement.
2. Remove the spark plug. Refer to Spark Plug Replacement in Powertrain Management.

Important: Rotate the engine so that the piston in the cylinder being worked on is at top dead center (TDC) before removing the valve keys. This will eliminate the possibility of the valve accidentally falling inside the cylinder.

3. Install the J 23590 to the spark plug port and apply compressed air in order to hold the valves closed.





4. Install the J 38606 on the valve spring.





5. Compress the valve spring using the J 38606.
6. Remove the valve keys.
7. Remove the valve spring and cap.





8. Remove the valve stem oil seal.
9. Inspect the valve spring for bent, cracked or broken parts. Replace it if damaged. Refer to Cylinder Head Clean and Inspect.

Installation Procedure

^ Tools Required
- J 42863 Valve Seal Installer
- J 38606 Valve Spring Compressor
- J 23590 Spark Plug Port Adapter

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.





1. Place the valve stem oil seal over the valve stem so the seal begins to contact the valve guide.

Important: Use hand pressure only when installing the valve seal using J 42863. Using to much force may cause damage to the oil seal and possibly lead to excessive oil consumption.

2. Using J41512 push the valve stem oil seal over the valve guide.





3. Install the J 38606 on the valve spring.





4. Compress the valve spring using the J 38606.





5. Using install the valve spring and the valve cap.
6. Install the valve keys.
7. Release the valve spring.
8. Ensure that the valve keys are seated.
9. Remove the J 38606.





10. Disconnect the air pressure, and remove the J 23590.
11. Install the spark plug. Refer to Spark Plug Replacement in Powertrain Management.
12. Install the push rod and valve rocker arm. Refer to Valve Rocker Arm and Push Rod Replacement.