Valve Spring: Service and Repair

REMOVAL PROCEDURE

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

1. Remove the valve rocker arm cover(s).
2. Remove the valve rocker arm and the push rod. Refer to Valve Rocker Arm and Push Rod Replacement

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.

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

5. Install the J 38606 on the valve spring.

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 the valve spring if damaged.

INSTALLATION PROCEDURE

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

1. Place the oil seal over the stem until the seal begins to contact the valve guide.
2. Push the valve stem oil seal over the valve guide using the J42863 until the tool bottoms on the valve spring seat.

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. Make sure that the seal is fully seated on the valve guide.

3. Install the J 38606 on the valve spring.

4. Compress the valve spring using the J 38606.
5. Install the valve spring and cap.
6. Install the valve locks.
7. Release the valve spring.

8. Release the air pressure, and remove the J 23590.

Important: Make sure that the valve keys are seated.

9. Install the spark plug.
10. Install the push rod and valve rocker arm.
11. Install the valve rocker arm cover(s).