need help with brake caliper tool
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Lexus Test Driver
Joined: Jun 2008
Posts: 1,257
Likes: 1
From: Hell
Lets just make sure we are talking about the same thing here. You want to compress the piston correct?
If you just broke a c clamp trying to compress one of the pistons it is either
A) all the way down
B) Seized in there and your options are to replace the entire caliper or fight with the piston to get it out and rebuild them.
If you just broke a c clamp trying to compress one of the pistons it is either
A) all the way down
B) Seized in there and your options are to replace the entire caliper or fight with the piston to get it out and rebuild them.
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SO, did the piston move at all when you tried with the clamp? I guess (and you hope) it could be a bad clamp. Maybe you tried to tighten it too fast and the handle tweaked; it's good to tighten it slowly to give time for the piston to return. I have sometimes used a pair of heavy duty, screwdriver sized pry bars, opposing each other in back-to-back fashion and pressed against either of the old shoes; then I just force the bars together until the shoes have fully seated the pistons back into the calipers.
But, as the previous poster said, if they won't move at all, 'A)' and 'B)' are pretty much your options. G/L
you had to do something pretty nasty if you broke your C-clamp on a caliper. i dont think your using it right....and you don't need to pop the bleeder screw open, i used a set of wide vice grips and walk the piston back in.
If you broke a c clamp you got 1 of two things a seized piston or collapsed line. An easy way to tell is by opening the bleeder screw and if the piston compresses easily then you have a bad line simply replace line and bleed. If it doesn't you need caliper. And just to be safe replace the other sides calipers and do brake flush all at once.
Driver
Joined: Dec 2008
Posts: 103
Likes: 0
From: Tacoma, WA
I was able to use 2 screw drivers to pry back the pistons on a 4runner today so if you need more force then that you need a rebuild or replacement. Be sure to take the cap off your brake fluid reservoir so the fluid can easily travel back into it as your pushing the pistons back.
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