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  #1 (permalink)  
Old 09-22-2007, 03:54 PM
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High Pitch Squealing

It's really intermittent. Had it once about a week ago, then had it again today.

When rolling down a side street around 40 km/h, I can hear this really high pitch squeal, squeal, squeal, squeal. It happens when I'm NOT applying the brakes, just rolling along normally. When I do apply the brakes the sound DOESN'T change. So I'm thinking it's NOT brake related.

And then the next day I'll go for a drive and all of a sudden it's gone. That's the confusing part.

Just reading through some other posts, I wonder if it's the A/C compressor?


Last edited by hawc; 09-22-2007 at 03:58 PM.
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Old 09-22-2007, 04:05 PM
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Does it sound like it's behind your head (as in the engine compartment) or elsewhere? Sometimes a small stone will get up in between the brake rotor and the thin rotor shield (the one that cuts your fingers when your washing down there) and it will make a high-pitched squealing noise. If you think it's a mechanical thing, you should probably take inti the dealer ans see if they can reproduce it.

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Old 09-22-2007, 07:58 PM
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I occasionally get a squeal when I am turning a corner. It sounds like a brake squeal but I am not using my brakes.

Last edited by gfspencer; 09-22-2007 at 08:08 PM.
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Old 09-22-2007, 08:09 PM
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where's it coming from? is it all related to bumps on the road?
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Old 09-22-2007, 08:17 PM
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Not related to bumps in the road, happens on perfectly straight, smooth roads. It increases squeal-squeal-squeal-squeal and decreases with speed. It sounds likes it's coming from lower down in the car around the wheels. Hard to tell if it's behind or not, but I think it is. Sounds 'outside' the car. Not a trim piece. It sounds like something rotating.

And it comes and goes. A lot of the highways around me have recently been stripped and waiting to be paved, so i wonder if it might be a small piece of gravel stuck in the brake shield.
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Old 09-22-2007, 08:29 PM
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Originally Posted by beez View Post
Does it sound like it's behind your head (as in the engine compartment) or elsewhere?

brad
Or could it be INSIDE your head?

Your pads still could be rubbing a bit in a spot against your rotors even when the brakes are not depressed. There isn't very much clearance. My track pads squeak a bit at times. But it goes away with a firm brake push.
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Old 09-23-2007, 12:23 AM
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Originally Posted by DaveN007 View Post
Your pads still could be rubbing a bit in a spot against your rotors even when the brakes are not depressed. But it goes away with a firm brake push.
yeah, the only thing is the sound doesn't change at all when I press the brakes.
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  #8 (permalink)  
Old 09-24-2007, 09:46 PM
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i have the same problem , most likely its the heat plate touching the brake discs .
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Old 09-25-2007, 03:16 PM
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You don't have one of these on the outside of your car, do you????

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Old 09-25-2007, 03:53 PM
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Originally Posted by hawc View Post
Not related to bumps in the road, happens on perfectly straight, smooth roads. It increases squeal-squeal-squeal-squeal and decreases with speed. It sounds likes it's coming from lower down in the car around the wheels. Hard to tell if it's behind or not, but I think it is. Sounds 'outside' the car. Not a trim piece. It sounds like something rotating.

And it comes and goes. A lot of the highways around me have recently been stripped and waiting to be paved, so i wonder if it might be a small piece of gravel stuck in the brake shield.
I suspect this is what it is... I see this all the time on the track if someone gets off into the marbles where there's small rocks - they get in there and make some noise... it will go away once it becomes dislodged...

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Old 09-25-2007, 04:31 PM
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Originally Posted by hawc View Post
It's really intermittent. Had it once about a week ago, then had it again today.

When rolling down a side street around 40 km/h, I can hear this really high pitch squeal, squeal, squeal, squeal. It happens when I'm NOT applying the brakes, just rolling along normally. When I do apply the brakes the sound DOESN'T change. So I'm thinking it's NOT brake related.

And then the next day I'll go for a drive and all of a sudden it's gone. That's the confusing part.

Just reading through some other posts, I wonder if it's the A/C compressor?

Was your wife in the car?
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Old 09-27-2007, 10:24 AM
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finally found it

i had the same problem , and initally thought it was the heat plate , took it again to the dealer today and they finally found the problem. the caliper is touching the rotor head , causing the squealing, the spacing between them is much much smaller than required . they still dont know how to fix it . might replace the caliper or the rotor head to see if they can give more clearance between them to avoid touching. both rear brakes have the same problem 3 mm clearance , the front ones are fine they have 12 mm clearance.
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  #13 (permalink)  
Old 11-05-2007, 02:57 PM
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I wonder if I now have the same problem. It started this weekend after I washed my CS (it sat for two weeks before I got a chance to wash it from a previous DE).

I noticed when I was rolling slowly a squeak, squeak, squeak... no, my wife was not in the car

I have plenty of break pad, I had a bunch of break dust that flung out (after I washed the car), but maybe is that clearance that you are referring to. I don't know what else it could be?

I won't have time to take it to the dealer until the weekend... It's just annoying and embarrasing... I was going slowly past a bunch of people on the boulevard, and here it is a bright red car, with a squeak, squeak, squeak....
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  #14 (permalink)  
Old 11-05-2007, 10:41 PM
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If you do get small stones lodged in the calipers, then hard braking when traveling forwards and backwards would dislodge them instantly.

Otherwise, and under normal automotive diagnosis..... the likely cause for these squeeks are wheel bearings (dare i say it). Those that experience it, do your cars sit around much?

Pop
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