Quote:
Originally Posted by scld1354
Get the broken bolt red hot with a torch. That should break any rust loose.
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What he said. Don't throw cold water on it just keep getting it cherry red, let it cool down, and then try to remove the head. If the head won't come off do the red hot/cool down/try to remove again. After three or four cycles you will probably be able to get it off.
This red hot/cool down thing will also work with the rear screw in oil gallery plugs when you get to that point.