thedillybar

On the rear caliper, the top slider is free (moves easily by hand) but the bottom slider is seized. I've removed the rubber boot, lubricated with generous amounts of WD-40 and PB blaster, and tapped on it w/ a screwdriver & hammer...no success. Any tricks?

I stole this pic from another website because it looks similar. One of the bolts threads in where the wrench is...and that piece is supposed to slide in & out so the caliper can float.

DragonSlayer

Keep using the PB Blaster...it works better than wd for this. Put a pair of vise-grips on the head of the bolt ant use hammer to tap the bolt back and forth in a circular motion. If that don't work, try a little bit of heat(careful not to melt the rubber stuff on the end).

thedillybar

Have tried rotating it w/ vise grips as well without any luck. Will keep trying w/ PB Blaster and then try some heat.

DragonSlayer

ok, just be careful with heat, use a little then try to hit it with the punch, then heat and repeat. It will eventually work loose, remember the Pb is flamable, too.

thedillybar

With the rubber boot gone, it should come all the way out? Then I can buy a new one, grease it, and finish the job?

gmlover

When this problem happened to me, I used the pb blaster and a BFM (big freakin hammer). It worked the first couple of hits.

thedillybar

Thanks for the advice.

The good news is I got it free. Vise grips as tight as possible, beat on vise grips with hammer, add some PB blaster. Repeat. 10-15 times. I ended up getting it to spin first, then after spinning it around a few times I spun and pushed at the same time and it came out.

Cleaned up the slot it was in w/ WD40 and a small file; cleaned up the pin w/ an emory cloth. Lots of grease on the pin & in the rubber seal and it's back together w/ new pads.


The bad news is the lower slider on the other side is also stuck...and haven't had any luck w/ beating on it yet. Letting the PB Blaster do it's job overnight and will try heat if all else fails.

thedillybar

Got it as hot as I could w/ propane torch, still wouldn't budge. Eventually I broke the head of the slider off and now have almost nothing to grab onto with the vice grips.

I think the best advice I've heard is drill a hole in the opposite side and try to tap it out with a punch. Also Autozone has one (not in stock) for $24.99 which is by far the easiest route.