Stuck caliper bolt

Posted by evanphi on Jul 03, 2013; 1:08am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Stuck-caliper-bolt-tp4043169.html

1975 CB750...

I need to clean my caliper piston and cavity, so I need to get my caliper off. My front caliper bolt won't come off. I've tried pounding it with a manual impact wrench, as well as heating it up first. All this after soaking it in PB Blaster for a few nights in a row. This is futile anyway because of the location of the threads. They're impossible to get to. It won't budge. The rear one came loose with a couple taps of the impact wrench, no problem.

Any tips? Should I try tighten-loosen-tighten-loosen...etc with the impact wrench to break up the threads?

I'd like to avoid drilling the head off this bolt...  :-\