there are 2 ways on is with the C- Clamp. when tightening the clamp loosen the bleeder valve. the second is have to use the caliper tool to screw in the piston
steve@spider-technologies.com
Use a "C" Clamp to fully retract the piston into the caliper body
The rear piston has to be turned in, it won't just push in, they make a tool at the parts store that makes it easier, if you have tried turning it in and it won't go you will have to replace the caliper as it's bad.
Look at the pistons in the caliper. If it is a cup type piston there could be several reasons for this, (requiring researching technical manuals). But if it is a solid piston with what appears to be 4 raised tabs around the piston in a + configuration this suggests that you may need to screw the piston back into the caliper turning it clockwise. Sometimes this takes quite a bit of turning. Otherwise the pistons are stuck, or you might need to open the bleed screws and compress the pistons as some vehicles have one-way pressure valves in the system. . To add a '96 cutlass caliper piston has to be screwed in clockwise with also applying steady pressure
Usually you can put a screwdriver between the edge of the rotor and the caliper and pry up on it. Stuck from rust, heat, or piston in caliper will not release? Rust, heat, it will pry up. Not releasing, open bleeder screw if possible without breaking it off.
AnswerThere is not enough information in your question. A cylinder piston you do not compress, you compress the rings in the piston. There are pistons in the brake system. There is no way of knowing the problem without being more specific.I'm assuming you mean the caliper piston. If it can't be compressed, replace the caliper.
The teves caliper is a single piston disc brake caliper and the akebono caliper is a dual piston disc brake caliper. The teves caliper is a single piston disc brake caliper and the akebono caliper is a dual piston disc brake caliper.
If the piston has come out, the caliper will need replaced.
The rear brakes you need a 3/8 standard wrench to open two bolts retaining the caliper. The piston caliper requires a special tool to "wind " it or screw it back in order to install the new brake pads. DO NOT PRESS THE CALIPER PISTON BACK. You have to "screw" or rotate it. The rear brakes you need a 3/8 standard wrench to open two bolts retaining the caliper. The piston caliper requires a special tool to "wind " it or screw it back in order to install the new brake pads. DO NOT PRESS THE CALIPER PISTON BACK. You have to "screw" or rotate it.
they must be screwed in because the e=brake is built into caliper. there is a tool kit that uses the grooves on piston but you can use channel lock pliers to turn piston don't chew up dust seal around piston .the right side is clockwise to turn in i think the left is ccw to turn in when piston starts moving in you going the right way. make sure you line the slots on the piston with the pins on the brake pads if not lined up you never get caliper on good luck ps when all done pump and release the e brake 20 time to self adjust the pistons
I had same problem, 1st see if you can pry open the piston just a little bit byshoving a flat screw driver between rotor & brake pad. And or in my case Ihad to grind off the edge of the rotor as tall as the pad in order to slide out thepads.Then replace the unit..
With a piston ring compressor.
Not alot of info. But I suspect you are wondering how to retract the caliper piston so that you can get the new pads in and the whole assy back on the rotor. Since they are "self adjusting" real breaks (that tighten slightly when you use the brake while in reverse) the caliper piston must be rotated counter clockwise while being compressed. You need to make or buy a special tool. I got mine at harbor Freight for $20.00. Hope this helps. New Answerer: I just finished doing this job for a 1990 Cutlass Supreme. I was able to compress the piston by putting gentle pressure on the piston with a 7 or 8 inch C clamp and then rotated the piston CLOCKWISE with Channel Lock pliers for the right rear brakes. (I assume it is counter-clockwise for the left rear.) I got a friend to slowly tighten the clamp while I turned the piston. It is important to use just the edge of the pliers so that the rubber bellows around the piston will not be damaged. I also had to grind the edges of the rotor a little to take off the edges for several inches on each side of the rotor so that the new pad material would not be damaged when the caliper and new pads were slipped over the rotor.