Brief sqealing sounds when starting to accelerate
04-05-2010, 10:16 PM
#11
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Join Date: Apr 2009
Location: MD
Posts: 68
Kind of, a brake pad is comprised of the plate that clips against the caliper and the actual pad compound, which is glued to the backing plate. The glue wore out and therefore the actual friction compound was just bouncing and rubbing against the rotor at low speeds. I don't know how familiar you are with basic aerodynamics but when the wheels moved faster, the laminar airflow viscosity formed a thin pressure boundary layer on the rotor so the friction material stayed in place for the most part and the noise was quieter. The glue on old pads can fail, especially if it was iced over.
04-05-2010, 10:23 PM
#12
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Join Date: Mar 2009
Location: Florida
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Yup, that's usually how it works. Like I said, this is just a possibility, not sure if this is the case for you but hopefully it is since it's a simple fix.
04-05-2010, 10:35 PM
#13
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Join Date: Mar 2008
Location: asdf
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After my car is parked for awhile, I've recently began hearing this squealing sound for a few seconds when I first accelerate. It isn't a belt, and it sounds like metal on metal. It usually last a few seconds if that just as I start moving forward, and it doesn't matter if I have the clutch in or out. The first few times I stop and go I hear it, but always the loudest the first time, and then nothing for the rest of the ride. It sounds kinds like break noise, but a slightly deeper sounding and not when I'm braking. I can't pinpoint where it's coming from other than underneath the car. I had a mechanic look at it and he couldn't find anything out of wack visually, so he said to keep an eye on it and bring it back if it gets worse. Any idea what could be causing this?
Last edited by vanquish; 04-05-2010 at 10:37 PM.
04-06-2010, 09:08 AM
#15
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Join Date: Apr 2009
Location: MD
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I'm gonna look into this IAC possibility as well because it does sounds a little deeper than a brake squeal, and it fits the symptoms pretty well considering that my drivability isn't being effected. My idle has been fine, though.
04-06-2010, 08:26 PM
#16
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Join Date: Apr 2009
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Here is a short video of the sound I took leaving work today. I took it with my cell phone so the sound quality sucks, but it should still be helpful. This is just after a backed out of my parking space. I set the phone on the dash and started moving in first. I didn't hear it for the rest of my drive.
http://www.youtube.com/watch?v=_TkE7kC0sMw
http://www.youtube.com/watch?v=_TkE7kC0sMw
04-07-2010, 12:54 PM
#19
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Join Date: Apr 2009
Location: MD
Posts: 68
I'm gonna have to have a mechanic look at it again, and find a way to make sure that it makes the sound so he can hear it. Unless someone can confirm that this is the same sound as the "french horn", I'm stumped. At least I know that I'm not the only one, but it'd be nice to figure this out.