Valve Stem Oil Seals
WARNING: This page is about a different car, the 1995 Ford Aerostar. However, it is still accessible from the selected car via links, so may be relevant.
Different types of valve stem oil seals are used on intake and exhaust valves. Use Valve Stem Seal Installer (T90T-6571-A) to install NEW valve stem seals. Ensure seal bottoms on valve guide. Oversized seals must be installed when using oversized valves.