hey guys starting today my z just randomly started to make a metal on metal squiling noise only upon acceleration and when the car is in motion.. when im still it obviously doesnt make a noise. this is the first time ive heard the noise.. i replaced all the rotors with slotted rotors and ceramic pads not even a year ago. When i first bought the car my right rear caliper was sticking so i replaced it as well. But today my right rear feels like its dragging and after a 5 minute drive it is scolding hot. i took the caliper apart and checked everything and when i went to put it back on it slid right in no porblems so i tohught i couldnt be sticking since i didnt have to press the piston back in. would any of these be a sign of a bad wheel/hub bearing? also i cut the squeaker on the brake pads (only right rear) and there isnt any metal on metal noise but the rotor is still getting scolding hot.. so i have no idea whats going on, need some help, greatly appreciated.. thank you!

 

looking at the piston in the caliper when all the way in does it sit flush with the seal? ive seen it where its cockeyed just a slight bit causing part of the piston to drag. you can rebuild your calipers easily with a rebuild kit off rockauto.com.
use compressed air on a empty clean caliper to pop the piston out. replace seals and use air once again to get the seal to seat over the piston. takes a couple tries.

 

Everything was flush. When I took it off and put it back on it slid on no problem.. like butter. I've replaced the right rear caliper not even a year ago. My next guess would be bad hub bearing or I might have a kink in the brake line restricting residual pressure. So either replace hub bearing or brake lines lol

 

Any possibility the parking brake portion is frozen on the inside of the rotor.

 

Checked that too lol I'm getting frustrated with this haha. About to replace the brake lines and hub bearing.

 

Did you see if there is any play in the hub?

 

Have you made sure the dust shield isn't dragging on the rotor?

 

Yes I've done all the basics. I'm talking off rim and calipers when I get home. Then going to spin each rotor and see which one has drag

 

i have found out the problem.. its the abs acuator.. itS A 1600 dollar part and 1400 in labor.. well i said screw that so im taking ABS off my car and just going with power brakes cause i dont ever drive it in the snow and hardly in the rain.. im going to then buy the brembo big brake kit (4piston). JUST A FORWARD WARNING NISSAN IS HAVING THESE GO OUT IN ALTIMAS MURANOS 350ZS ROGUES