need a special tool to turn them back in the dont press in
Brake piston? Front use a "C" clamp to compress Rear - Piston is threaded turn clockwise to compress (water pump pliers?)
You will need a caliper rewinding tool
It requires a special tool to turn and compress the piston in at the same time.
the piston on the rear calipers will turn in a clockwise motion and that is how they retract.
Rewind it with a piston rewind tool or, at a pinch, use needle nose pliers.
A special tool (not expensive available at Sears or auto parts) is required Piston is threaded
If they are the same as a 97 Maxima then you twist them, don't compress them. To compress the piston you do it with a 'Disk Brake Piston Tool'. You can get this at Pep Boys for $12. To compress the piston on the passenger side you turn the piston clockwise. To compress the piston on the driver side you turn the piston counter-clockwise. Be careful trying to turn the piston using pliers or some other tool as you may tear the rubber seal around the piston.
Shade tree mechanics use a C-clamp and a flat steel bar to compress the piston. I have also used a large adjustable Channel-Lok-type pliers to compress.
You need to rotate the piston counter clockwise.
Use a C clamp to push the piston out of the way to remove and also to place back on rotor.
If it is the front brake use a "C" clamp to retract piston If it is the rear and the parking brake is used by this caliper piston is threaded and a special tool (not expensive) available at Sears or auto parts to "screw" piston into caliper body
with a c clamp. put a block of wood or your old pad over the piston and tighten with clamp.