05-30-2016, 12:04 PM
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CC Member
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Join Date: Apr 2009
Location: Little Rock area,
AR
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,533
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In my opinion both are a concern with a steel bolt threaded into an aluminum part. But for most of these cars that haven't been bolted together for 20 or 30 years - galling is probably the biggest concern. In addition to using anti-seize on any bolt into aluminum I have another rule of my own, which is never to remove a sparkplug or other torqued fastener in aluminum on a hot engine. I'm sure people do it all the time and manage to get away with it but I think that is how most plug holes get stripped in aluminum cylinder heads.
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