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I have used a 3/4 ratchet with great success. If that does not work, heat the bolts with a small torch being careful not to melt anything or heat the rotors. That will loosen the loctite. However, I have seen yellow loctite on most of them which is supposed to be removable without heating.
I finally got them off. Just took a little more effort than i was originally giving it. (By effort I mean using a sledge hammer to hit the ratchet in the direction needed until bolts loosened)
Just a note to anyone with this problem, a slap hammer is the best way to go. Just put in the bit rap the back with a hammer and two taps later the screws will back right out, no effort at all.
I just pulled mine this weekend and found they were very tight. I used a 3/4 drive socket and long bar and then used a screw jack to slowly move the long bar. Kind of "shade-tree" but it worked like a charm.
Sounds to me like an impact driver is what is needed.
An impact driver is a $15 tool at your local auto parts store. It holds various bits including phillips and flat head screw. When you pound the hammer on the head the unit compresses a little and turns causing the screw to back out.
I spent most of the day yesterday trying to get the front caliper mount bolts off. I borrowed a friends compressor and pneumatic tools last night. Hopefully, these things will come off easily when I get home after work. This has been a PITA and I have 4 rotors and pads to get on the truck before a 7 hours trip tomorrow evening.
You've been working on this crap for four months and you still don't have them off? Even I am not that slow. Work SLOWLY with the air tools. You don't want to rip the heads off, then you're really screwed. Start at around 100 lb/ft or so and go up. PBblaster or liquid wrench is your friend as well.