Valve Guide Seal: Service and Repair

VALVE STEM SEAL

REMOVAL

NOTE: The tools used in these valve stem seal procedures are part of Special Tool 9106 Valve Assembly Tool Case.

1. Remove the starter.
2. Remove the camshafts.
3. Remove one spark plug from the cylinder to be repaired.
4. Position the cylinder to be repaired to TDC.





5. Using Special Tool 9102 Flywheel Locking Tool, lock the flywheel by inserting the tool into the starter opening.
6. Pressurize the combustion chamber.





7. Install the assembly tool (1). Compress the valve spring.





8. With the valve spring compressed, remove the collets (1).
9. Release the valve spring and remove the valve spring retainer (2), the spring (3) and spring seat (4).





10. Remove the valve stem seal (2) using the seal pliers (1).

NOTE: Assemble the valves completely before removing the air pressure from the cylinder.

11. Repeat these steps for each cylinder required.
12. Inspect all of the valve stems. Damaged valves must be replaced.

INSTALLATION

NOTE: Valves with nicked or burred stems must be replaced.

NOTE: The tools used in these valve stem seal procedures are part of Special Tool 9106 Valve Assembly Tool Case.





1. Lubricate the new seal (3) with clean engine oil.
2. Install the protective sleeve (2) over the valve stem.
3. Press the new seal over the sleeve on to the valve stem using the seal pliers (1).
4. Remove the protective sleeve (2).





5. Install the valve spring seat (4), valve spring (3), and the valve spring retainer (2).





6. Compress the valve spring using the assembly tool (1).
7. Install the valve stem collets with the valve spring compressed.
8. Release the valve spring slowly.
9. Be sure that the collets are seated in the valve spring retainer.
10. Remove the assembly tool.

NOTE: Perform this procedure on one cylinder at a time.

11. Repeat the procedure for each valve that is to be serviced.





12. Remove Special Tool 9102 Flywheel Locking Tool (1).
13. Install the starter.
14. Install the camshafts.