Valve Spring: Service and Repair

REMOVAL PROCEDURE

^ Tools Required
- J23590 Spark Plug Port Adapter
- J38606 Valve Spring Compressor

1. Remove the valve rocker arm cover(s). Refer to Valve Rocker Arm Cover Replacement (Left Front) and/or Valve Rocker Arm Cover Replacement (Right Rear).

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 push rod. Refer to Valve Rocker Arm and Push Rod Replacement
3. Remove the spark plug. Refer to Spark Plug Replacement (3800 L36 (VIN K)) in Starting and Charging.





4. Install the J23590 to the spark plug port and apply compressed air in order to hold the valves closed.





5. Install the J38606 on the valve spring.





6. Compress the valve spring using the J38606.
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. Refer to Cylinder Head Clean and Inspect in Engine/Unit Repair.

INSTALLATION PROCEDURE

^ Tools Required
- J41512 Valve Guide Installation Tool
- J38606 Valve Spring Compressor
- J23590 Spark Plug Port Adapter

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

NOTICE: Use hand pressure only when installing the valve stem oil seal using the J41512. 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 J41512 until the tool bottoms on the valve spring seat.





3. Install the J38606 on the valve spring.





4. Compress the valve spring using the J38606.
5. Install the valve spring and cap.
6. Install the valve locks.
7. Release the valve spring.

IMPORTANT: Ensure that the valve locks are seated.





8. Release the air pressure, and remove the J23590.
9. Install the spark plug. Refer to Spark Plug Replacement (3800 L36 (VIN K)) in Starting and Charging.
10. Install the push rod and rocker arm. Refer to Valve Rocker Arm and Push Rod Replacement
11. Install the valve rocker arm cover(s). Refer to Valve Rocker Arm Cover Replacement (Left Front) and/or Valve Rocker Arm Cover Replacement (Right Rear).