Re: Aluminum Head?
Posted by Jack Vines on 2021/1/31 11:46:24
Yes, agree, first confirm the spark plugs are correct.
No, stacking washers under the plug is a VERY BAD THING !! The extra washers impede heat transfer, effectively making it a much hotter plug; increasing the liklihood of pinging.
No, do not change to an iron head unless the aluminum head is declared unserviceable by a knowledgeable Packard expert. Packard Engineering went to the aluminum head because it was necessary for your engine.
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