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Piston Pin: Inspection

  1. Measure diameter of piston pin. Zero dial indicator to piston pin diameter. Insert gauge in piston boss to measure piston pin-to-piston clearance.
  2. Piston pin-to-piston clearance must be .0005-.0009" (.013-.022 mm). If piston pin clearance is greater than .0009" (.022 mm), use an oversize piston pin, and recheck clearance.
  3. Check difference between piston pin diameter and connecting rod small end diameter. Piston pin-to-connecting rod interference must be .0005-.0013" (.013-.032 mm).
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