The Unfixable Squealing Brakes

[scorpmatt]

Originally posted by: jtvang125
Time for a brake upgrade. 13" oversized slotted and crossed drilled rotors, 8 pison calipers and high performance brake pads.

can one say, swiss cheese?

 

[SVT Cobra]

I'd help you, but the fact that you are ignorant enough to think that the problem is that it is an important, lets me know you are a lost cause.

Change all the breakpads to organic green materials. Voila no screeching.

 

[Scouzer]

Originally posted by: SVT Cobra
I'd help you, but the fact that you are ignorant enough to think that the problem is that it is an important, lets me know you are a lost cause.

Change all the breakpads to organic green materials. Voila no screeching.

The fact you are so ignorant to call them breakpads...well, undermines your credibility quite quickly.

Even if you were credible, you have no idea how LOUD the squealing is when it's cold. It is seriously someone screaming in my wheel wells. It is not a normal squeal.

 

[CFster]

Originally posted by: BUTCH1
They should have turned the rotors while they were replacing the pads, that's just lazy
not to. Like Funboy42 said, threaten them with a lemon law return if they won't fix it
properly.

Why?

Almost every manufacturer recommends turning or replacing the rotors only if there is significant lateral runout or deep gouging present. Light gouging isn't a problem. Anybody tells you that you should turn or replace your rotors whenever you replace the pads is full of it. I know, I run a certification shop. I can also tell you that if your rotors are warped, turning them will only postpone the day when that pulsation returns. Once the rotors are overheated and warped, they essentially turn into a spring. They want to bend, and will continue to bend. I don't turn rotors, I replace them.

Scratched or improperly cut rotors can cause a vibration/noise, but it is almost always from some yahoo screwing them up with the brake lathe, or wearing the pads down to the rivets. Doesn't really happen otherwise.

As for the OP's problem, GMs have been notorious for this very problem for years. I can't tell you how many newer GMs come into my shop with squealing brakes. IMO, it's due to looser tolerances in the calipers vs. their foreign counterparts. The pads are allowed to move between the caliper and rotor, which sets up a vibration which causes a noise. A lot of foreign designed calipers hold the pads more tightly to the rotor, keeping things quieter.

 

[BUTCH1]

Well I stand corrected, I myself also gave up on having rotors turned years ago as the FL heat
would have me taking the brakes apart 6-8 weeks later to replace the newly re-warped rotors.
In the OP's case I was thinking along the lines of a small amount of material removed, just so
the new pads could seat themselves. It's ridiculous he should have to pay out of pocket for
high-end parts to have the brakes work correctly..