Hello tried to replace rear pads but found one of the pistons in the caliper will not go back in . Has anyone got an idea what to do or have similar problems.
Stripped and cleaned mine a few months ago. I did the cable tie method to remove each piston, cleaned it and lubed it. Basically to get them out you should be able to use the hydraulic pressure, just cable tie the other pistons into the callipers so they don't move. Then pump the brake and watch it shoot out. Once cleaned, they should go back in really easily.
