Rear Brake Piston on 2000 question?

[MustangC4]

I am trying to put new brake pads on my daughters 2000 Mustang V6. I am using a 6 inch C-clamp to try to push the piston back into the brake assmbly but it will not budge. By chance, do I have to turn these pistons like a screw to get them to move back in. I notice 2 grooved notches on the part of the piston the makes contact with the brake pad, and I was wondering if there is for a special breake tool needed to tur the piston so it will retract back into the piston bore??????

PLease Help! I am not a Mustang Guru....

Thanks in advance

 

[Skymarshal]

Yes, the piston is supposed to be turned clockwise to retract it into the cylinder. Auto parts stores sell the part- a little aluminum box with prongs on it and a square for your socket extension.

Check the fluid level in your master cylinder before you do that! If it's near the top, it will overflow when you retract the pistons.