Valve Guide Seal: Service and Repair

Valve Seals

Valve Train Components - Exploded View:

Special Tool(s):

Material:

Removal

RH cylinder head valve seals
1. Remove the RH valve cover.

LH cylinder head valve seals
2. Depending on the valve being serviced, remove the LH or RH valve cover.

All valve seals
3. Remove the spark plug for the cylinder being serviced. For additional information, refer to Ignition System.
4. Rotate the crankshaft until the piston for the valve being serviced is at the top of its stroke with the intake valve and the exhaust valves closed.

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. Failure to follow these instructions may result in engine damage.

NOTE: Do not allow the valve keepers to fall off of the valve or the valve may drop into the cylinder. If a valve drops into the cylinder, the cylinder head must be removed.

NOTE: It may be necessary to push the valve down while compressing the spring.

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





6. Use compressed air in the cylinder being serviced to hold the valves in position.
^ Apply a minimum of 965 kPa (140 psi) of compressed air into the cylinder.

7. 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. Failure to follow these instructions may result in engine damage.

NOTE: 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. If a valve drops into the cylinder, remove the cylinder head.

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





8. Remove the valve spring retainer, the valve spring and the valve seal.
^ Discard the valve seal.
9. Inspect the components.

Installation

All valve seals

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. CAUTION: If the components are to be reinstalled, they must be installed in the same positions. Failure to follow these instructions may result in engine damage.

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. Failure to follow these instructions may result in engine damage.

NOTE: Do not allow the valve keepers to fall off of the valve or the valve may drop into the cylinder. If a valve drops into the cylinder, the cylinder head must be removed.

NOTE: It may be necessary to push the valve down while compressing the spring.

NOTE: Lubricate the camshaft roller followers with clean engine oil prior to installation.

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





6. Install the spark plug.

LH cylinder head valve seals
7. Install the LH valve cover.

RH cylinder head valve seals
8. Install the RH valve cover.