i just replaces mt rear brake pads, but they seem to be rubbing on the rotor. When i drive i can hear them scraping on it. I used a c-clamp to push the piston in, but do i have to do it more? also, will tightening the guide pins too much cause this????

 

nah, I did new rear brakes, new rotors, new pins on drivers side. still squeals like a ****.

do a search on:

rear axle
C clip
caliper shim

and you will get all info you need.

You will probably need to do the rear axle c clip and the caliper shim to fix this. That's what I'm gonna do.

Hope this helps