Posted by MarkB_MI on December 23, 2008 at 02:09:55 from (216.234.123.188):
In Reply to: Re: broken bolt posted by Roy in georgia on December 22, 2008 at 16:51:02:
Roy, I know it sounds counter-intuitive, but that bolt MUST be hot to come out. You need to break the bond between the bolt and head, otherwise if you do screw the bolt out you're going to bring the aluminum threads along with it. Due to the dissimilar metals, there's corrosion in the threads and you need heat to break it down.
You will never get it hot enough by heating the head. Not only does aluminum have a low melting point, but it's highly conductive and will just sink all the heat away from the bolt.
Yes, you could damage something by getting the bolt too hot. But you WILL wreck your head if you don't.
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