Hi, i just replaced the rear brake pads on my car yesterday. What i did was i used a hammer to retract the piston on the caliper. I didn't know that the proper way to retract it is to turn it using a tool like a large flat screwdriver to turn it. Now, my question is did i just broke or did some damage on my calipers? Thank you.

 

Cars aren't for everyone. Also a hammer is rarely called for when working on cars.

 

Probably should be looking for an new caliper.