I removed the rear caliper and am trying to compress th episton with a c-clamp,Is this the wright method ,the piston is not moving.

IS THIS A REAR OR FRONT CALIPER?
1. FRONT CALIPER: INSERT A LARGE C CLAMP WITH THE SCREW END INTO OPEN BORE OF CALIPER PISTON, THE STATIONARY END SHOULD BE SNUG AGAINST THE CALIPER END HOUSING: THAT THE PISTON MOVES IN AND OUT OF
COMPRESS C-CLAMP UNTIL CALIPER PISTON SEATS FULLY AGAINST THE CALIPER SEAL. INSTALL NEW PADS
2. REAR CALIPER: RENT AT AUTOZONE A REAR DISC CALIPER COMPRESSION TOOL. THESE CALIPER PISTONS WIND IN CLOCKWISE, INSTEAD OF JUST SLIDING BACK INTO A SMOOTH BORE. THEY HAVE GROOVES THAT FOLLOW A MATCHING SET IN THE CALIPER HOUSING.
FURTHER [email protected]

You need to compress the caliper piston back into the caliper assembly to allow the new pads to fit over the rotor. A C clamp can be used to compress the caliper piston. Be sure to remove the brake reservoir cap before compressing the piston and remove excess fluid from the reservoir to prevent over filling.

A special tool is required to compress the caliper piston on the rear brakes-don't use a C-clamp on the piston.
Raise the vehicle and remove the tire. The rear calipers have only one guide pin. Remove this pin and raise the caliper. Remove the old brake pads. Using the special tool compress the caliper piston-the piston will have one or two slots on it. These slots must in the correct position to remount the caliper. Install the new brake pads and slide the caliper back over the rotor and replace the guide pin. If the caliper doesn't slide over the rotor you'll need to reset the slots on the piston. Replace the tires and you're ready to go.

yes, you can rent one from Auto Zone, Advanced Auto Parts, etc.

take calipers loose from rotor.then take large c clamp and put one side on the piston the other side on backside of caliper.the tighten c clamp untill caliper is compressed;oh yea before you do ant of this remove cap from master cylinder

The rear calipers on these models require a special tool that compresses and turns the piston in at the same time -- most parts stores carry this tool.

It is called a caliper piston press -- and it installs where the pads would go and acts like a c-clamp,when turning handle it will turn the caliper piston backinto the caliper as it compresses it.
Anytime the brake rotor or brake pads are being replaced, the rear caliper piston must be seated (bottomed) to compensate for the new brake rotor or lining. Because the Parking Brake self-adjuster mechanism is attached to the piston, a special seating method is required. The only acceptable method is by rotating the piston back into the bore using Retractor,MILLER Special Tool 8807, . Any other seating method will damage the self-adjuster mechanism.
Good luck and hope this helps.

u have to turn the piston clockwise as you compress it.

For the rear you need to turn the piston as you crank with the C clamp. It's a lot easier with the right tool. Any good parts store has the tool. The tool to use is a universal brake caliper tool, I picked mine up from Pep boys for $10 bucks. The tool fits on a socket wrench and you turn it clockwise to depress the piston into position.
If everything is apart and you don't have an extra car, just used a pair of sturdy needle nose pliers to get int the groves and twist, no pressure needed.
Tork it down just enough to get the caliper back on. Once it is all bolted back up you will pull many many times on your e-brake handle to tighten the piston back up against the new pad.
Good luck, but try to use the tool.

Some caliper pistons are the wind back type.
You will need to buy a special tool to wind the piston back with.
Usually fairly cheap .
The Pistons usually wind back in a clockwise motion.
Hope this helps.

Try to release the bleeder valve while compressing the piston if it moves then you need a new rubber brake line if still dont move then need to replace the caliper hope this helps .