Valve Guide Seal: Service and Repair

REMOVAL
1. Remove cylinder head cover(s).
2. Remove rocker arm shaft assemblies.
3. Rotate crankshaft until piston is at TDC on compression stroke.
4. Remove spark plug from applicable cylinder.
5. Using a air hose attached to an adapter tool, install it into the spark plug hole. Apply 90-120 psi air pressure.





Fig. 64

6. Use Special Tool MD-998772A with Mounting Post 6886, Forcing Screw Arm 6887, Forcing Screw 6765 and Adapter 6885 (Fig. 64) to compress valve springs and remove valve locks.
7. Remove valve spring.





Fig. 65

8. Remove valve stem seals with suitable tool (Fig. 65).

INSTALLATION





Fig. 66

1. Install the "gray" valve seal onto the intake valve guide and the "grayish green" seal onto the exhaust valve guide (Fig. 66).





Fig. 67

2. Using Special Tool MD-998774, install valve seal by tapping lightly until seal is in place (Fig. 67).
3. Use Special Tool MD-998772A with Mounting Post 6886, Forcing Screw Arm 6887, Forcing Screw 6765 and Adapter 6885 (Fig. 64) to compress valve springs only enough to install locks. Correct alignment of tool is necessary to avoid nicking valve stems.
4. Repeat Removal Steps 3 through 7 and Installation Steps 1 through 3 until all necessary valve springs/seals are replaced.
5. Install rocker arm shaft assemblies.
6. Install cylinder head cover.