Valve Guide Seal: Service and Repair

Valve Seals

Special Tool(s):

Material:

Removal and Installation

CAUTION: During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces, that enters the oil passages, coolant passages or the oil pan, can cause engine failure.

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

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

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





5. Use compressed air in the cylinder to hold the 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 position. Mark the components for location.

NOTE: 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.





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.

Using the special tools, install a new valve seal.





2. Install the special tool between the valve spring coils to protect the valve stem seal from damage.





3. CAUTION: If the components are to be reinstalled, they must be installed in the same position.

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





4. CAUTION: If the components are to be reinstalled, they must be installed in the same position.

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





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