im changing my rotors and pads and i cant get the bolts off of the caliper mounting bracket. tryed wd-40 and other lube. wont budge tryed the biggest breaker bar that fits what will get them off ilv been trying for an hour now

 

it takes a good bit of effort sometimes, they tend to be loc-tited pretty good on there.

 

+1 they can be really tough to brake loose. Make sure you use a 6 pt socket and try a good breaker bar. Also try turning the wheel for better access. Also remember righty tighty lefty loosey. When your doing it from the backside its easy to get confused.