Impala Tech - View Single Post - The S-I-L's 66 Caprice Engine Bay Restro
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post #136 of (permalink) Old 04-19-2016, 05:42 PM
Big Dave
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Join Date: Jan 2006
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If you used an aftermarket double row roller timing chain it could a connecting link that might be hitting the block as it rotates. I have experienced that problem occasionally with a BBC. I had to grind the block to clear the chain going around the cam gear.


Big Dave
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