I am trying to do the rear brakes on my 1990 rx7. and I can't get the caliper piston to move back and make room for my pads. I have opened the bleeders and it still wont move. If any one knows how to do this I would appreciate advice.

 

The piston twists. You need to kind of screw it back in. It's not just a push in like the fronts.

If it doesn't twist back in, it is probably seized.

 

Thanks I'll give it a shot.