Valve Spring: Service and Repair

Valve Stem Oil Seal and Valve Spring Replacement

Special Tools
* J 22794 Spark Plug Port Adapter
* J 38606 Valve Spring Compressor

Removal Procedure




1. Remove the valve rocker arm. Refer to Valve Rocker Arm and Push Rod Replacement (Service and Repair).

Note: Remove the spark plugs from the cylinder head with the engine at room temperature.

2. Loosen the spark plug 1 or 2 turns.
3. Brush or air blast away any dirt or debris from around the spark plug.
4. Remove the spark plug.




5. Install the J 22794 into the spark plug hole.
6. Attach an air hose to the J 22794 .
7. Apply compressed air to the J 22794 in order to hold the valves in place.




8. Using the J 38606 compress the valve spring.




9. Remove the valve stem keys (225).
10. Using the J 38606 carefully release the valve spring tension.
11. Remove the J 38606 .
12. Remove the valve spring cap (224).
13. Remove the valve spring (223).
14. Remove the valve stem oil seal (222).

Installation Procedure




1. Clean the cylinder head valve spring seat and area.
2. Install the valve stem oil seal (222).
3. Install the valve spring (223).
4. Install the valve spring cap (224).




5. Compress the valve spring using the J 38606 .
6. Install the valve stem keys.

1. Use grease in order to hold the valve stem keys in place.
2. Make sure the keys seat properly in the groove of the valve stem.
3. Using the J 38606 carefully release the valve spring tension, making sure the valve stem keys stay in place.
4. Remove the J 38606 .
5. Tap the end of the valve stem with a plastic faced hammer to seat the keys, if necessary.




7. Remove the compressed air supply from the J 22794 .
8. Remove the J 22794 from the spark plug port.





Caution: Refer to Fastener Caution (Fastener Caution).

9. Hand start the spark plug.

Tighten the spark plug to 15 Nm (11 lb ft).

10. Install the valve rocker arm. Refer to Valve Rocker Arm and Push Rod Replacement (Service and Repair).