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Old 03-28-2011, 08:40 AM   #10
JWL
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Join Date: May 2010
Location: Fitzgerald, Georgia
Posts: 2,204
Default Re: new guy with two flathead questions, if I'm allowed

The "points" of the threads can get hot enough to start the reaction in the combustion chamber. If you have ever welded aluminum you will see that it can become a light red color just before it gets greasy.
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