There not like the front calipers where you put a c-clamp on the piston and squeeze them in, on the rear calipers you have to get a special tool from the parts store and as you push inward you have to turn them in.
c clamp or channel locks or depress the pedal
Turn the piston clockwise and it scews itself in...
that depends if it is front or rear calipers
Yes, you need to remove the caliper first, then use the old brake pad and a C clamp to push down the piston of the caliper.
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.
Unlike the front calipers, pistons in the rear usually have to be rotated to compress them.
screw it in turn the piston clockwise and screw it in , only for rear brakes
With a BFH ( Big Friggen Hammer)
Rear pistons are threaded and a special tool (not expensive) is required. Available at Sears or auto parts
You may need a rear disc brake caliper tool for your car. See the link below to see what it is C-clamps also work but you have to be careful to squeeze the caliper straight in. Take your time.
I guess you've either removed the old pads or are about to..?? When you get em out.. use a piece of wood and a C clamp (wood workers use em) place wood in caliper and adjust cclamp to fit.. screw in clamp.. will push the caliper pistons backinto place.. Oh.. undo filler lid fo rthe brake fluid.. help ease the pressure
pop the wheels off, un-do the 2 x caliper bolts take caliper off take springs and shims off the original break pads as they might be needed for the new set.. refit and done