Ranger 4WD V6-245 4.0L VIN X SFI (1999)
Valve Guide Seal: Service and Repair
Special Tools
Removal
1. Remove the valve cover.
2. Remove the rocker arm shaft assembly.
3. Remove the spark plug.
4. Position the piston at top dead center.
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 bins and excessive guide to valve stem clearance.
Use a suitable tool and apply air pressure to the cylinder.