Brake noise after drum to disc swap Options

[Syzygy]

I recently completed the swap from rear drum brakes to disc brakes. I successfully bled the brakes, and there are no leaks anywhere. When I first took the car out, I noticed a grinding noise coming from the rear brakes. Since I had removed any surface rust from the rotors, and check the pads for wear (they were in good shape), I assumed that the proportioning valve needed to be replaced, as it's different between the ST and GT, or so I was told at the dealer. So I found a convertible at a junker, got the valve, which looked to be in good shape, installed it, and..... no change. The noise isn't very loud, and it doesn't sound very messy - it sounds to me like the pads are riding on the rotors instead of gripping them. They're gripping enough to keep the rotors shiny, so....? I've tried anti-squeal stuff, shims, etc., to make sure I'm not getting any weird metal-on-metal resonances or anything. What could the problem be? Thanks all!

[playr158]

yea i have that issue too?!

i actually think its sumthing inside the e-brake assembly rubbing the rotor

This post has been edited by playr158: Jun 2, 2005 - 11:01 AM

[LewFX]

i had a similar issue as well, i sanded down the inside of the rotor and sanded down the brake shoes...no noise in the back anymore.

[Syzygy]

LewFX - was it constant, or only during braking? Also, what part of the shoes did you sand? I checked, and there aren't any obvious marks where things are rubbing.

[LewFX]

it happened when cruising around 20-40, my brake clips were making noise when i braked in the front.

[Jeremy1210]

It could be a frozen caliper. I had one of those. After driving a few miles check the temp of the rotors. If one is hotter than the other, could be the problem.

Mine was so frozen it made my rotor glow red

This post has been edited by Jeremy1210: Jun 2, 2005 - 8:37 PM

[Syzygy]

The noise doesn't happen when I'm driving around, only when I'm actually braking. I hear a rubbing, grinding noise as the car slows, and it stops as soon as the car does.

[Jeremy1210]

hmm well what kind of rotors did you put on? and what kind of pads? Mine make that noise when I first drive my car, then it goes away. If its always there, could be something stuck b/w the pad and the rotor.

Just call a shop and ask them. THey will give you an answer of what to look for.