need help with rear disk brake pad installation

[gideup]

I got myself a set of slotted rotors and decided to change out the disk pads. All went well up front but on the rear I cannot get the brake piston to compress enough to re-install the caliper assembly. I used a large C clamp and ended up twisting the steel handle into a crooked mess. Put the assembly back on the spindle and tried a pry bar. Even added my 25" breaker bar for additional leverage. It won't move. Any ideas are greatly appreciated as my car is now forever stuck on the floor jack. (I also have the master cylinder lid off so that the fluid can back up into the resevoir. I even tried opening the bleader valve at the caliper to no avail thinking that the pressure would release easier.

BTW this is a 97 GT

 

[tomustang]

you need to get a piston compressor, you have to twist the piston back in. autozone has the kit you can borrow

 

[TripleBlk]

You need the special tool (autozone will rent it to you for free). There is a steel disk that inserts into the slots of the disk brake piston. (IIRC) You just turn the disk clockwise while pushing in slightly and the pston will recede.

 

[Juiced87Notch]

a set of large channel locks will work in a pinch... if that or any other tools dont work, you may have a seized caliper, if so you need to replace or rebuild both rear calipers, I'd just replace em both anyways it isnt that much and its good insurance IMO.

 

[gideup]

thanks for the help, autozone in the morning

 

[NYStang2002]

I hope you didn’t ruin your pistons. I'm cringing just reading about the unnecessary force you put on your pistons. All you had to do is buy the piston compressing tool at Sears and turn clockwise while compressing. Also remember to leave the piston notches on the six o'clock position when your finished.

 

[NYStang2002]

thanks for the help, autozone in the morning

NO!!!! don't go to Autozone for the tool! The one they sell does not have the proper fitting for the Mustang piston. Go to Sears and get theirs. They have one extra fitting that the autozone tool doesn't. I wasted 9 bucks at Autozone and wound up going to Sears.

 

[gideup]

You think that you are cringing. You have no idea how much force i put on them, my stomach is rolling just thinking about the potential damage I might have done.

 

[gideup]

Sears works for me.

 

[tomustang]

autozone is free, and they do have the PART you need. hell i used it and it is in their stock

 

[gideup]

oops, no can find tool on sears website

 

[n0v8or]

Is this it?
http://www.sears.com/sr/javasr/prod...00946344000&subcat=Automotive+Specialty+Tools

 

[MT1083]

this is the one that I have:
http://www.napaonline.com/cgi-bin/n...t?prrfnbr=15612779&prmenbr=5806&usrcommgrpid=

 

[merc123]

Needle nose pliars worked on my Cougar. If the piston looks the same and has the slots where you can put the pliars in, go for it.