The rear calipers have a small screw that prevents the caliper from being pressed back into place. If you look on the inside of the caliper (towards the body), you should see a small, 10-12mm brass bolt. Remove it, and underneath, you will find a small Allen-head screw. If you unscrew it, it will allow the caliper to be retracted. Once you've retracted it enough, *lightly* screw the Allen screw back in until it stops. The moment you feel resistance, is enough pressure.
Caliper pistons should retract if calipers are in working order. Calipers need to be removed and rebuilt or replaced. A brake fluid flush is highly recommended.
You need to turn the piston clockwise and it will slowly retract as you turn.
Use a "C" clamp to fully retract piston into caliper body
us Cclamp to retract caliper leave old brake pad in place put clamp over caliper with 1 end on brake pad and the other over caliper back start to tighten very simple.
On the back of the caliper there should be a bolt its a 14mm you take it out and inside there is a bolt also its Allen key you use and Allen key and retract the caliper. it works on all 626 from 1994 till 2002
Use a "C" Clamp to fully retract the piston into the caliper body
Double check your rear brakes. Sometimes your self adjusting screw (star-wheel adjuster) is seized, or your wheel cylinder won't retract, or your parking brake cable is seized in the activated position.
You cant, it needs a 'C' clamp.
Proper Torx bit or wrench for caliper C-Clamp to retract piston to get it off the disc
Clockwise to retract piston into caliper body
There is a tool used to twist the piston back into the caliper I bought mine from Canadian Tire.
1) remove Wheels 2) Loosen Caliper mounting bolts 3) Remove one caliper mounting bolt completely 4) Re-install 2 lug bolts to hold disk in place 5) swing caliper either up or down depending on which caliper bolt you have removed 6) use "c" clamp or similar tool to retract piston in caliper 7) install new pads 8) re-install caliper bolts 9) re-install wheel