I'm getting an tune up done this week to winterize my car, will be garaged for 3 months. so far i changed the plugs, motor oil, tranny oil, brake fluid, and put in antifreeze, but now i want to also change the pads and rotors, been squeaky for some time now, but the damn lower caliper bolt wont come off, what can i do to get it to loosen up, already used a load of WD40 but nothing.

 

PB Blaster is available at local aprts stores, department stores etc. It's a penetrant, not just a water displacer. Awesome stuff.
Plus you may want to use alittle heat on the bolt.

 

Yeah PB is great better then WD-40! Unless you know how to extract a bolt be very carefull when taking it off. I have a drill and extractor kit so I really don't care much on a stubburn bolt. But use a lot of lube and a whole lot of heat.

 

Here is what you do.

1. Spray the bolt with PB Blaster (let it sit for 5-10 mins)
2. Hit the bolt with a hammer a few times
3. Spray the bolt with PB Blaster (let it sit for 5-10 mins)
3. Hit the bolt with a hammer a few times again
4. Try and break it loose with a breaker bar and an impact socket (u might break a regular socket)
5. Use a propane torch or a torch of some sort.
6. Hold the torch on the bolt for about 5 minutes or so.
7. Break it loose.

That is a fool proof method to getting the bolt off. If you want to be extra safe (you really should) so it doesn't happen again, apply some "never seize" to the bolt when you put it back in.

 

Half inch drive & an adjustable breaker bar. I never have problems with that.

 

Except that those suspension/brake bolts tend to shere off at the head of the bolt pretty easily. I'd go with the PB Blaster/hammer method. Will the other bolt come off so you could flip the caliper down instead of up?

 

I guess my brakes get replaced all too often.

I've used PB blaster before, good stuff to have around. And the propane torch method works wonders on seized bolts as well.

 

the upper bolt is a lil stubborn as well, I'm going to need to make a trip to my uncles, yesterday he could not give me any of his tools cause he had a load of cars to work on, ill try heating the bolt a bit and see if that loosens it up.

edit: ohh yeah the funny thing is that my mechanic changed them 4 months ago, so i dont know why they are so tight, i started not to go to him anymore just because i spend too much money at his place.

 

He prolly used an Impact gun on it like an idiot.

 

Use Never Seize!