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Valve Guides

  1. Valve guides must be reamed for oversize valves if stem-to-guide oil clearance exceeds specification. See CYLINDER HEAD  table under ENGINE SPECIFICATIONS at end of article. 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.
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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