2000 Lincoln Ls v6 do you need any special tool to move pistons back to apply new rear brakes pads?
I just used a channel-lock pliers to colapse the caliper. It screws in with screw threads. I had never changed rear disk brakes that worked this way. But when it was obvious that my C-clamp was not colapsing the caliper, I realized it worked by a different method. So screw it down as far as you need it, pop on the new pads and your set. I did open the bleeder valve because I was at my wits end when the C-clamp didn't work. So you may not even need to open the system to compress the piston, it may just screw down without having to let air into the system.