Mountaineer AWD V8-4.6L (2010)
Valve Guide Seal: Service and Repair
Valve Seals
Valve Seals
Removal
1. Depending on the valve seal being serviced, remove the LH or RH valve cover. For additional information, refer to Valve Cover - LH See:
Cylinder Head Assembly/Valve Cover/Service and Repair/Valve Cover - LH or Valve Cover - RH See: Cylinder Head Assembly/Valve
Cover/Service and Repair/Valve Cover - RH.
2. Remove the spark plug. For additional information, refer to Ignition System.
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. NOTICE: If the components are to be reinstalled, they must be installed in their original 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. For additional information, refer to Cylinder Head See: Cylinder Head Assembly/Service and Repair/Removal
and Replacement/Cylinder Head - Removal.
NOTE: It may be necessary to push the valve down while compressing the spring.
Using the Valve Spring Compressor, compress the valve spring and remove the camshaft roller follower.
5. Use compressed air in the cylinder to hold both valves in position.
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Apply a minimum of 965 kPa (140 psi) of compressed air into the cylinder.
6. NOTICE: If the components are to be reinstalled, they must be installed in their original 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
