Posted by Chriscase [76.212.169.152] on Wednesday, November 25, 2009 at 20:16:09 :
In Reply to: Re: Edmunds aluminum head on eBay posted by David Sherman [216.18.131.33] on Wednesday, November 25, 2009 at 12:48:01 :
It's zinc. It's the sacrificial anode of the system. They pit and dissolve, so radiators don't have to.
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