Valve Guides
WARNING: This page is about a different car, the 1995 Ford Windstar. However, it is still accessible from the selected car via links, so may be relevant.
- Valve guides may be reamed for oversize valves if stem-to-guide oil clearance exceeds specification. See CYLINDER HEAD table under ENGINE SPECIFICATIONS. Valves are available in .015" (.38 mm) and .030" (.76 mm) oversize.
- Valve guides may also be bored and replaced with a service guide if oversize valves are not available, or if guide is damaged. Ream valve guides until proper stem-to-guide clearance exists.
CAUTION:
DO NOT
ream valve guides from standard to maximum oversize in one step. Ream valve guides to oversize in gradual steps so valve guides are reamed in relation to valve seat. Valve seats must be ground when valve guide is reamed or replaced.