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Valve Guides

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NOTE: DO NOT ream valve guides from standard to maximum oversize in one step. Ream guides in gradual steps, so guides are reamed in true relation to valve seat. Valve seats must be ground when valve guide is reamed or replaced.
  1. 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.
  2. Valve guides may also be bored out and replaced with a service guide if oversize valves are not available or guide is damaged. Ream valve guides until proper stem-to-guide clearance exists.
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