Mustang GT V8-4.6L SOHC VIN X (1998)
Valve Guide Seal: Service and Repair
REMOVAL
1. Remove valve covers and rocker arms.
2. Remove spark plug from applicable cylinder.
3. Position piston at top of stroke with both exhaust valve and intake valve closed.
NOTE: Failure of air pressure to hold the exhaust valve and intake valve closed while performing the following steps is an indication of valve
and/or valve seat damage and requires removal of cylinder head.
4. Install an air line with an adapter in the spark plug hole and turn air supply ON.
5. Install Valve Spring Spacer 303-382 (T91P-6565-AH) between valve spring coils.
6. Compress valve spring using Valve Spring Compressor 303-381 (T91P-6565-A).
CAUTION: If air pressure has forced the piston to the bottom of the cylinder, any loss of air pressure will allow the valve(s) to fall into the
cylinder. A rubber band, tape or string wrapped around the end of the valve stem will prevent this from happening and still allow enough travel to
check the valve for binds and excessive guide-to-valve stem clearance.
7. Remove valve spring retainer keys, valve spring retainer and valve spring.
8. Using locking pliers remove valve stem seal.