caliper bolts stuck

[sortafamous]

i tried to change my rotors today and the caliper mount is stuck on there, anyone have any suggestions to getting the bolts off? all 4 are stuck, and i tried wd-40..

also to get the piston back in i need to get that cube thing right? my friend who was helping me said i should only need to get some kind of clamp to push it back in but i said it required twisting, he didnt believe me.

is twisting uncommon or is it universal? is it something just for the SHO cause he swore up and down all i needed was a C clamp or such to push the piston back in

 

[Ishodu]

If you are talking rear calipers they need to be turned in. The front just pushed in. The bolts maybe tough they may have locktite on them.

 

[Bizzy]

i tried to change my rotors today and the caliper mount is stuck on there, anyone have any suggestions to getting the bolts off? all 4 are stuck, and i tried wd-40..

also to get the piston back in i need to get that cube thing right? my friend who was helping me said i should only need to get some kind of clamp to push it back in but i said it required twisting, he didnt believe me.

is twisting uncommon or is it universal? is it something just for the SHO cause he swore up and down all i needed was a C clamp or such to push the piston back in

Get some PB Blaster for the bolts. Soak them down several times tonight and then try again in the morning. You can try some heat on them as well but watch what you get hot.

The front brakes you can push the caliper piston back into the bore with a wood block and a c-clamp. The rear brakes do require rotation to get them to go back into the bore. You can use the little cube thing, but it's useless IMO. I use a large pair of channel locks to turn the piston back. If you use that method you must watch that you don't pinch the rubber boot. If the caliper is working properly it should turn back by itself requiring minimal pressure. Don't force it or you will ruin the caliper.

In all the days I've been doing brakes the SHO rear calipers are the first that I've ever encountered that have to be turned back. How uncommon it is I'm not sure, perhaps these days it is a standard for some.

 

[sortafamous]

ok thats probably why he was looking at me like i was ******** when i said they needed to be turned back in.

thanks everyone

 

[luigisho]

For the rear caliper twist/turn I usually use the loan-a-tool program at the local AutoZone to get the correct tool for the job. Works flawlessly.

 

[Electricat]

The twist-in rear piston is common, if not nearly universal.....I have seen it on several different Ford and GM vehicles. I have no idea why they use this design tho....

 

[GMAN]

Front Caliper Bolts

I too was attempting to change my rotors. I was using the ratchet to loosen the two torx bolts holding the caliper. After 15 minutes of racheting, they just didn seem to want to come out. I can see the bolt twisting as I turned the ratchet. Am I doing anything wrong?

 

[pjtoledo]

I too was attempting to change my rotors. I was using the ratchet to loosen the two torx bolts holding the caliper. After 15 minutes of racheting, they just didn seem to want to come out. I can see the bolt twisting as I turned the ratchet. Am I doing anything wrong?

The threads on those torx bolts are only about 5/16" long, after a few turns the bolt is out of the threads but the rubber boot still has a grip on them. Just pull them out now, sometimes have to put a screwdriver tip in someplace to start them sliding.

Perry

 

[pjtoledo]

The twist-in rear piston is common, if not nearly universal.....I have seen it on several different Ford and GM vehicles. I have no idea why they use this design tho....

It is necessary for the parking brake to be self adjusting. Pull one of those apart sometime, lots of parts inside those calipers, there is even a miniature version of an upper front strut bearing in there.

Perry

 

[GMAN]

Thanks, I will go try it again. Also, what do I look for that would cause the ABS light to come on?

 

[Bizzy]

Could be a sensor or it could be that you've just got crud built up at the sensor. Take a thin sheet of sand paper and run it in the gap at the sensor. There is a magnetic field there so metal particles like to build up in between the sensor parts.