Quote:
Originally Posted by Bob Carriere
From what I have read pre-ignition or pinging is the culprit and not over-revving and such a situation is encountered when lugging over long hill.......
The good old days!!!!!
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Yes, sounds like the engines were running lean or the timing or grade of fuel was wrong.... the melting is a result of a overheat situation .
I have heard about the Chevy 6 pistons breaking ( more common with the cast iron alloy pistons ) or fracturing apart at the crown or top where the top ring groove is, this was due to over-revving, but that's another issue not a over heating thing.
Alf Howard, a member of the VMVC told me he worked in the SEC just after the war and his work crew were based at Kiewa . The crew used a brand new Chevy C15A, they would drive home to Melbourne each Friday night and the throttle was floored all the way, he said after about 3 months of this abuse the motor was completely worn out.