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Re: Help identifying pinging/rattling
Sufficiently retarded timing can have the fuel still combusting when it leave the cylinder. Without reading all the way through what was written previously, have you verified that the timing mark on the harmonic balancer is indeed indicating TDC when #1 cylinder is at TDC?
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~Steven
'70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper
Simi Valley, CA
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