turn it in clockwise with a pair of needlenose
the piston needs to be turned counter clock wise while compressing the piston
you can use a C clamp and squeeze the cylinder down and then your brake shoes should be far apart enough to just fit on the rotor.
You can use a large C-Clamp to compress the caliper piston.
Turn it to the right
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
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.
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.
did you try turning it backwards or left handed. I had a Nissan Maxima and the pistons were left handed
they make a tool for it that you should be able to buy at any parts store, i was able to use a pair of needle-nose pliers, open the pliers and put the tips into the notches on the inside of the caliper piston, turning clockwise will compress the piston.
If there are disc brake, it could be frozen caliper slides or a frozen caliper piston. If they are drum brakes, it could be a frozen wheel cylinder.
toolsfront or rear?drum or disc?need more infoif front disc then you will need caliper piston compressor or big C clampneed socket for caliper bolts removal
C or G clamps.