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Piston Pin Inspection

WARNING: This page is about a different car, the 1999 Acura 3.0CL. However, it is still accessible from the selected car via links, so may be relevant.
  1. Measure diameter of piston pin. Zero dial indicator to piston pin diameter. Check piston for cracks or distortion. Measure piston pin bore in piston. Difference between the 2 measurements is pin-to-piston clearance.
  2. Ensure clearance is within -0.0002 to +0.00004" (-0.005 to +0.001 mm). If clearance is greater than 0.0002" (0.005 mm), install an oversize piston pin and re-measure clearance.
  3. Measure difference between piston pin diameter and connecting rod small end bore. Interference fit between piston pin and connecting rod should be 0.0002-0.0006" (0.005-0.015 mm).
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