Take the 2-minute tour ×
Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. It's 100% free, no registration required.

We have a 2006 Buick Lacrosse. We just installed new front brakes. 2yr rotors and lifetime performance ceramic pads. We have used these pads in the past on the car and never experience this issue.

We first noticed an issue when making left turns. When turning there was a constant squeal that seemed to be coming from the front driver side wheel. Noise faded away when driving straight or turning left.

Noise does not seem to be directly correlated to braking and occurs when no braking is being performed.

After further investigation I noticed something that further confused me. When driving up and down the driveway I noticed that the front driver wheel made the noise when backing up, and the front passenger when driving forward.

I can best describe the noise as something like nails on a chalkboard. A constant high pitched squeal. Perhaps metal on metal.

Anybody have any ideas?

share|improve this question
    
This sounds like the "squealer" (brake pad wear indicator) is making contact with the rotor. Are you sure you put the brake pads in correctly? As in, are you sure the pads with the metal squealer tabs were put on where the old ones came off? –  Paulster2 Apr 27 at 9:44
    
@Paulster2 Yes, nearly 100% sure. I actually don't believe they will fit in incorrectly in this car, I think the inside and outside pads are different size. The noise sounds like the squealer, but even if the pads were switched I don't see how the squealer could be making contact with the rotor over the thick new pads. I'll take a peek today to confirm. –  denver Apr 27 at 12:42
    
You can have left and right side brake pads with the squealers meant for the top or bottom of the caliper, if you were considering I was suggesting inside/outside only. –  Paulster2 Apr 27 at 13:53

1 Answer 1

up vote 2 down vote accepted

I found what was causing the noise. There is a small metal plate, roughly sized and shaped like a one of those little wooden ice cream spoons that come with a Dixie cup. It is positioned suspending from the bottom of the hub parallel to the back of the rotor. On both sides of the car it was touching the rotor causing the noise.

enter image description here

On the driver side the front portion was touching, and on the passenger the back, which I suppose explains why it seemed to come from one side when backing up and the other when driving forward.

I have bent this plate back a little and the noise is gone.

So the question is what is this little plate for, and why was it suddenly scraping on both sides?

A picture is attached.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.