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Squeaky brakes - what causes them?

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Old 10-05-2003, 07:17 PM
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ATH
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Default Squeaky brakes - what causes them?

Couple of questions regarding squeaky brakes. I read somewhere that they can be caused by a warped rotor... is this true? First, my girlfriend's Volvo has THE squeakiest brakes ever - it's extremely embarassing when she pulls up to stop lights. And recently my brakes have begun to squeak when slowing from higher speeds (50+), but do not squeak when going slower than that.

So, what causes brakes to squeak only at slow speeds, and what causes brakes to squeak only at high speeds? Is there any way I can fix this? I was thinking she probably needs new rotors, but my fronts are brand new (OEM) so I don't know what I can do - maybe stop hard from 100 or something?

Thanks!
Old 10-05-2003, 07:21 PM
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Slam on 'em a few times from high speeds
Old 10-05-2003, 07:28 PM
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Default It could be wear indicators, how much pad is left on her car?

If the pads and rotors are new, try a few hard 60-10 slows (not stops!). Do it 5 or 6 times, you should smell brakes. That should bed the pads properly.
Old 10-05-2003, 07:39 PM
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how long to pads usually last? mine have started squeaking a good amount
Old 10-05-2003, 08:07 PM
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Really depends, with regular street useage, maybe 30k-40k.
Old 10-05-2003, 09:59 PM
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Default I've got almost 40k on mine and still going. One autocross (m)

and a driver's education course on them. They squeaked before those events and continued to. Just had my car in for the 40k service interval and they deglazed the pads and rotors - squeaking is gone.

I didn't ask about how much looked to be left on the pads, but figured since they were working on them specifically, and they didn't change them, they aren't close to being done yet. Driving style probably has a big play in how many miles you get out of them. I try and coast up to stops whenever possible so I doubt I go through pads as quick as some others.
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