216 little end
had a similar problem, a slight knock cold, lost compression during a long hot pull but the Chev made it home. Discovered bush came loose in piston,worked out into the cyl wall, big groove up wall. All pistons had cracks into gudgeon area, motor had done 25,000 mls, std bore, no shims left on rods but crank 0.005 wear. will rebuild after sleeving.
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macca C15 C15A
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