did you try turning it backwards or left handed. I had a Nissan Maxima and the pistons were left handed
At the centre of the rear of the caliper, you wi;; see a 14mm bolt. Remove the bolt and insert a torx bit, t20 or 25 and turn the screw inward as far as possible. As the screw turns, it will draw the piston in. When fully retracted, don't forget to replace the bolt.
the caliper piston turns clockwise to compress,the gm w-bodys are known for bad rear calipers. gmjim
There is a special tool that one needs to accomplish this task. It turns the piston while pressing the same piston into the caliper body. Try www.germanautoparts.com to purchase same. Do not try to do it without this tool, you will damage the caliper and it will cost you $$$$$ to replace.
Since you did not give any details I will have to answer with some general suggestions. 1. standard caliper, use a C clamp to compress the caliper ( no need to bleed system ) 2. If you do not have a C clamp, release the pressure by turning the bleed screw and push the caliper in. you will need to bleed the system if you do this. 3. certain vehicles need a special tool that turns the caliper in ( will have a slot in the piston ), they are pretty cheap and your local auto parts store will have them. When you get there get all over the parts counter person for not mentioning that you would need one.
Compressing the rear brake caliper piston on a 2008 Chrysler Town and Country requires a special tool that pushes in and turns the piston at the same time.
You need a tool from your local autoparts store that turns the piston in the caliper instaed of pushing it in.
you need a special caliper tool that turns the piston as it pushes it in, or if you are on a tight budget grab a wrench and a regular caliper compressor and turn the caliper clockwise as you tighten the tool (or ask someone for help, easier with 2 people) hope this helps.
You need a tool mostly used on ford cars that turns the piston while pressing it.
As far as I know, this applies to all cars regardless of manufacture. If the piston in the caliper is a hollow cup, it pushes in. If it is solid with a flat surface and some sort of design or a groove in the face it turns in to compress.
The calipers do not just compress down on the rear disk brake, they have to be screwed in clockwise because of the parking brake system. Turns out there is a special tool you can purchase, called a Disc Brake Piston Tool its about $12.00, but if your in a bind you can use a pair of needle nose pliers to insert in the notches and screw the caliper in clock wise. I also had to use a pair of channel lock to start screwing in the caliper.
There is a cap that looks like the top of a cap screw, but it is a plug, not a bolt. If you remove the plug, you then put a 4mm hex wrench into the hole to back off the caliper (this is how the parking brake is adjusted). The cap is on the back of the caliper. When you put the new pads in, you tighten up the caliper with that same 4mm hex wrench, and back it off until the wheel turns freely. This is from a 4 wheel disk 2003 Mazda Protege 5.
if its on a car or truck (brake caliper) it is how the emergency brake works, usually on the rear, it has a cable that turns the cylinder inside the caliper