Valve Guide Seal: Service and Repair

Valve Seals

Special Tool(s):

Material:

Removal
1. Depending on the valve seal being serviced, remove the LH or RH valve cover.
2. Remove the spark plug.
3. Rotate the crankshaft until the piston for the valve seal being serviced is at the top of its stroke with the intake valve and the exhaust valves closed.

4. CAUTION: If the components are to be reinstalled, they must be installed in the same positions. Mark the components for installation into their original locations.

Using the special tool, compress the valve spring and remove the camshaft roller follower.





5. Use compressed air in the cylinder to hold both valves in position.
- Apply a minimum of 965 kPa (140 psi) of compressed air into the cylinder.

6. CAUTION: If air pressure has forced the piston to the bottom of the cylinder, any loss of air pressure will allow the valve to fall into the cylinder. If air pressure must be removed, support the valve prior to removal.

CAUTION: If the components are to be reinstalled, they must be installed in the same positions. Mark the components for installation into their original locations.

Using the special tool, compress the valve spring and remove the valve spring retainer keys.





7. Remove the valve spring retainer, the valve spring and the valve seal.
- Discard the valve seal.
8. Inspect the components.

Installation

1. NOTE: Lubricate the valve seal and valve stem with clean engine oil prior to installation.

Position a new valve seal onto the valve stem.
2. Using the special tool, install the new valve seal.





3. Using the special tool, install the valve spring, the valve spring retainer and the valve spring retainer keys.





4. Relieve the air pressure from the cylinder.

5. CAUTION: If the components are to be reinstalled, they must be installed in the same positions. Mark the components for installation into their original locations.

Using the special tool, compress the valve spring and install the camshaft roller follower.





6. Install the spark plug.
7. Depending on the valve seal being serviced, install the LH or RH valve cover.