Valve Spring: Service and Repair

Valve Stem Oil Seal and Valve Spring Replacement

Tools Required

^ J 5892-D Valve Spring Compressor
^ J 22794 Spark Plug Port Adapter
^ J 43105 Valve Stem Seal Installer

Removal Procedure





1. Remove the valve rocker arms and pushrods.

Important: Rotate the piston in the cylinder being serviced to the bottom of its stroke, to ensure that the engine does not rotate when the compressed air is applied.

2. Rotate the crankshaft until both valves are closed before installing the compressed air into the cylinder.
3. Remove the spark plug from the cylinder being serviced.





4. Remove the valve stem keys as followed:
1. Install the J 22794 into the spark plug hole.
2. Apply compressed air into the cylinder in order to hold the valves closed.
3. Lightly tap the valve spring cap to loosen the valve stem keys.
4. Install the J 5892-D to the cylinder head.
5. Install the valve rocker arm nut.

Important: Tighten the valve rocker arm nut enough to hold J 5892-D in place.

6. Using J 5892-D compress the valve spring.





5. Remove the valve stem keys (1).

Important: Do not release the compressed air from the cylinder being worked on. The valve will fall into the cylinder bore.

6. Slowly release the J 5892-D.
7. Remove the J 5892-D from the cylinder head.
8. Remove the valve spring cap (2) and valve spring (3).
9. Remove the valve stem oil seal (4).

Installation Procedure





1. Lubricate the valve stem and outside diameter of the valve guide seal with clean engine oil.
2. Lubricate the rotators with clean engine oil.

Important: When installing valve seals, J 43105 must be used to achieve correct installation. Failure to use J 43105 may cause excessive oil consumption.

3. Install the valve stem oil seal (2) over the valve tip and onto the valve guide using J 43105. Tap the valve stem seal onto the valve guide until the J 43105 fully seats the seal.
4. Install the valve spring cap and the spring.





5. Important: When installing valve springs, the small end of the valve spring must be installed up.

Install the valve spring (3).
6. Install the valve spring cap (2).





7. Using J 5892-D compress the valve spring.
8. Install the valve stem keys as follows:
1. Apply a small amount of clean grease to hold the valve stem keys in place.
2. Carefully release the J 5892-D. Make sure the valve stem keys do not move.
3. Remove the J 5892-D from the valve assembly.
4. Remove the compressed air from the cylinder being worked on.
9. Install the spark plug.





10. Install the valve rocker arms and pushrods.