so i just put new brakes on my friends 92 corolla (front and rear). and when i went to bleed them, the pass rear drum was dumping fluid. so i took it apart again and the piston was leaking from the seals (small mystery hole). i picked up a new piston (or wheel cyclinder, whatever you wanna call it) and i tossed it in. i pumped up the brakes again and kablam! fluid everywhere. pulled the drum off and the rubber seal boot thing popped of the piston. so i put it back on and the same problem happened. i am going to pick up another cylinder today and hope that it was just a defective replacement part. but my question is...does anyone have any ideas as to what would cause this???? i dont want it to pop off while she is driving and then have the brakes not work.