max_stuermer

iTrader: (1)

Installed new Hawk Ceramic pads last night, and even did the bed in procedure. I also resurfaced my rotors to get the old film off since I was switching to ceramic. For some reason, I can hear a slight whining noise like my pads are barely dragging on my rotors while I accelerate/cruise (not a squeak). When I hit the brake, the whining noise intensifies until I have come to a complete stop. I can brake perfectly fine without any performance issues. Any one has any ideas what may be happening?

Should the noise go away when the pads wear down some?

Thanks for the help once again.

monchie

I'm having the same issue as well. Not sure if its the wheel bearings or the brakes. It only makes the grinding noise when i'm cruising in slow speed and it stops when i push the brakes. Not exactly know what's causing it...

DialUp

Did you lube the shims?

If not, try applying some silicone lube between the shim and the caliper.

max_stuermer

iTrader: (1)

I lubed them, but very lightly. (wasn't sure if I had enough lube). Maybe I didn't apply enough? DialUp, all it sounds like is the pad dragging across metal constantly. When I slow down, it get's really loud until I stop. Would not lubbing up the shims cause this noise? It's not a squeak at all, just more of a grind.

alnielsen

iTrader: (4)

The brake cooling duct could be making contact with the rotor. Or, some brakes come with a low pad sensor. That could be bent.

max_stuermer

iTrader: (1)

Looked at my rotors, and noticed they were perfectly glassed over like most other rotor faces are. I immediately thought maybe I didn't bed my pads in aggressively enough. So I went and tried to "re-bed" them, and did it much more aggressively. Unfortunately, there is still the noise. I'm wondering if the person who resurfaced my rotor did a poor job? Would this be a culprit?

DialUp

I haven't worked with aftermarket pads before, I don't know if it's the shims for sure. I just had the thought that if they were thicker or heavier shims than OEM, and lack of lube was the cause, it would probably make a sound more like a whine than a squeak (But probably not a grind). It's also a pretty cheap & easy fix, so no harm in trying?

I think if the rotors were poorly resurfaced, and it caused lateral runout, that would cause brake pedal pulsation but probably not a grinding sound. But maybe it does with the compound in those pads? I don't know for sure, it's over my (apprentice) head. But if you have a dial gauge and a solid mounting surface you can verify the job fairly easily. If there's more than 4/1000" runout, they should re-do them for you.

max_stuermer

iTrader: (1)

I accidentally typed the wrong thing on my previous post. I noticed that the rotor faces WERENT glassed over like normal rotors were. So, I tried to rebed them in last night. After rebedding, I checked this morning and the pads seemed to all have put a nice glassy finish on the rotor face except for the front left rotor. It was glassy on one half of the rotor, and the top half was a little rougher (felt like bare metal). I wonder if i'm getting uneven brake pad wear?

While installing the new pads, my front left caliper bolts where the caliper floats were completely frozen. So, I pulled them out, and found that the boot had a tear in it, and caused water to get in the grease and rust it out. I polished the bolt, regreased it, and put it back in there with the torn boot for a temporary fix (getting the boot replaced this weekend). I wonder if that is causing the uneven wear with the new pad?

I REALLY am trying to fix this before I go to my mazda mechanic. He quoted me for 370 dollars for front and rear pads only (without resurfacing), and I laughed in his face and said I would do it myself. If I go back, i'm worried he will tell me he will have to replace the pads and the rotors (just in spite of it).

HELP!

julieford7

Did you lube the shims?