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Valve Guides

  1. Ream valve guides 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. Bore out valve guides, and fit with a service guide if oversize 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. Grind valve seats when valve guide is reamed or replaced.
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