What does the brake fluid look like? If it's real black (like most old/neglected cars) you should power bleed the entire system to flush it out. There could be just enough gunk in there to cause the piston to hang slightly but not completely bind up.

And that would be my 2 cents!

 

I would use a penatrating oil like wd-40 or pb blaster. Kinda peel your dust seal back and spray all the way around the piston. Push it in then hit your brake pedal LIGHTLY while someone is watching so you don't blow it out! Do this several times and they should free up. It probably would'nt hurt to open your bleeder and get some fresh fluid in. This worked on my truck and i havn't had any more trouble. Grease the pins good before driving them back in.

 

As I think of it, I'm pretty sure my dad bought one of those tubes of it like $15 bucks worth haha so I should be good on that part that and I have some lil packets hangin around somewhere I'm sure at my autozone you get like 4 free when you buy new pads

 

If you do this I'd put a "c" clamp on the caliper loose so you don't blow the piston all the way out.

 

Yeah I would use a C clamp on it, like when you first bleed the brakes. I'll give it a shot see what happens thanks everyone

 

Alright guys, I took the calliper off, The rotors spin for ever on their own. so it's not the rotors, I greased the pins and put wd40 inside the piston behind the dust boot, they work a little better but still wont let the rotor spin freely like it should, I don't see how the pistons in the callipers are bad I bought 2 new callipers last year for it the pistons are still shiny silver. so I have no idea what to do now.

 

Heard a rumor that the brake lines can corrode where they connect to the caliper. Inside the little banjo, If there is junk in there that could be your problem.

 

I know someone asked before... but what does the fluid look like? if its contaminated it will mess everything up as well.... could also be master cylinder a swell... had one do that the brakes would hang up on it ended up being the master cylinder they'd never lock up all the way but be tight,,,

 

The brake pads should rub on the rotor when it's installed, that's normal, there should be some friction. But if it's to the point where you can barely spin it with force, then there's a problem. Is it just a little friction or a LOT of it?

 

Don't rule out the possibility of a $15 replacement caliper going bad before you think it should.

 

It doesn't make a lot of heat, but it rubs like crazy, and also you could be right about the $15 dollar replacement callipers, though they were $24 haha But When I greased em the piston looked pretty good no rust on it at all.