Valve Seals: Removal
- Depending on the valve being serviced, remove the LH or RH valve cover. For additional information, refer to Valve Cover - LH or Valve Cover - RH in this section.
- Remove the spark plug. For additional information, refer to ENGINE IGNITION - 5.4L (3V) article.
- 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.
- Using the special tool, compress the valve spring and remove the camshaft roller follower.
- 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.
- Using the special tool, compress the valve spring and remove the valve spring retainer keys.
- Remove the valve spring retainer, the valve spring and the valve seal.
- Discard the valve seal.
- Inspect the components. For additional information, refer to ENGINE SYSTEM - GENERAL INFORMATION article.
CAUTION:
If the components are to be reinstalled, they must be installed in the same positions. Mark the components for installation into the 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. For additional information, refer to Cylinder Head .
NOTE:
It may be necessary to push the valve down while compressing the spring.
CAUTION:
If the components are to be reinstalled, they must be installed in the same positions. Mark the components for 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.
NOTE:
If a valve drops into the cylinder, remove the cylinder head. For additional information, refer to Cylinder Head .