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Home >> Ford >> 1997 >> Taurus G, AX4N >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> Engine - 3.0L V6 - VIN [U,1 & 2] >> Overhaul >> Cylinder Head >> Valve Guides

Valve Guides

  1. Valve guides must be reamed for oversize valves if valve 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.
  2. Valve guides may also be bored out and fitted with a service guide if oversized valves are not available or guide is damaged. Ream valve guides until proper valve stem-to-guide oil clearance exists.
NOTE: 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.
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