Holes in piston?????

[Mike K]

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!!!!!

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.