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Valve Guide Measurement Procedure

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  1. Measure valve stem-to-guide clearance. Clamp Dial Indicator on to the exhaust port side of the cylinder head. Locate the indicator so that the movement of the valve stem from side to side, crosswise to the cylinder head, will cause a direct movement of the indicator stem. Drop the valve head about 0.064" (1.6 mm) off the valve seat. Use light pressure when moving the valve stem from side to side in order to obtain a clearance reading. See VALVES .
  2. Valve guide with excessive clearance must be repaired. See VALVE GUIDE REAMING PROCEDURE FOR OVERSIZED VALVE STEMS .
  3. Replace cylinder head if valve guide cannot be repaired or reamed to accept an oversize valve stem.
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