Suggestions to undoing tight brake caliper bolts?

[Ota]

I am trying to remove the bottom 14mm bolt from the brake calipers,so i can fit my new brake pads on, but its too tight. I initially used a standard 14mm hex key. It didn't work. A friend suggested using a breaker bar. But it won't fit into the wheel arch. + i don't have any air tools. Help?

[Jason-VR]

Not a good idea giving members help with brakes.

If you can't undo a bolt then you more them likely don't have the skill to work on the most important equipment on the car.

[tencents]

WD-40?
join a gym?

[debonaire]

Not a good idea giving members help with brakes. If you cant undo a bolt then you more them likely dont have the skill to work on the most important equipment on the car.

What a stupid and presumptuous comment.

If you've never met a bolt you couldn't budge, then you obviously haven't done much work on cars.

Chris, one thing you can try with this sort of thing is turning on some steering angle. You might be able to find a sweet spot that gives you a bit more access.

[Tweak]

Don't use heat on the bolt. It will melt the rubber boot and burn the grease on the slider. Get a hammer and give the top of the bolt a knock to break the crud. U should be able to swing a breaker bar in there for sure . Just don't round the bolt off . If it won't budge go to a workshop

[Dire]

Hammers fix everything.
If not you could try freezing it, heat would just make it expand and get more stuck.