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"Grinding" noise from driver's front wheel-well wh

 
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overlordspock
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PostPosted: Mon Nov 28, 2011 10:41 pm    Post subject:  "Grinding" noise from driver's front wheel-well wh Reply with quote

For about the last week or so, my wife's '05 LS has been making an "odd" noise from the driver's front when braking. The sound doesn't happen all the time, but seems to happen more often when braking from higher speeds, but it doesn't start right away; it only starts when the car has slowed to be less than 10 mph.

I'm not really sure how to describe the noise. It's not a squeal or screech of worn pads (and rotors and pads were replaced just less than 12,000 miles ago). It's not really a grinding noise. From inside the car, it sounds a little like the ABS is engaging (but still not quite). You don't really feel it in the brake pedal though. It's not loud, but it's not soft either. The noise is definitely only coming from the driver's front wheel, none of the other three.

I haven't had the opportunity yet to pull the wheel off to check the pad and rotor, but thought I'd throw this out here to see if any of you might have any ideas.

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98ss
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PostPosted: Tue Nov 29, 2011 12:53 am    Post subject:   Reply with quote

If the pads were just changed, it is possible that the rust on the rotor has built up high enough that it is scraping somewhere. Check to make sure the backing plate is far enough away from the rotor. Also, if its a squeek you can always put some disk brake quiet, get the spray stuff in the can and let it set up before you put it back togeather.
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2001Ls
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PostPosted: Tue Nov 29, 2011 12:38 pm    Post subject:   Reply with quote

My ABS sensor was bad and it would make a grinding noise.

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IffyG
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PostPosted: Tue Nov 29, 2011 2:52 pm    Post subject:   Reply with quote

My Monte Carlo was doing the same thing until I replaced the hub. I'm pretty sure I had a bad speed sensor (among other issues).

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ad0726
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PostPosted: Tue Nov 29, 2011 4:39 pm    Post subject:   Reply with quote

My 03 does the same, I know is a bad hub (rear left to be exact), but I don't use that car too much.
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overlordspock
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PostPosted: Tue Nov 29, 2011 8:28 pm    Post subject:   Reply with quote

I was wondering if it might be the hub. How would I know for sure if I have a bad hub?

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00impala123
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PostPosted: Tue Nov 29, 2011 8:54 pm    Post subject:   Reply with quote

Jack the car up and try to rock the tire in and out from the top or bottom of the tire.

It sounds like its def a bad hub

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overlordspock
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PostPosted: Tue Nov 29, 2011 9:00 pm    Post subject:   Reply with quote

00impala123 wrote:
Jack the car up and try to rock the tire in and out from the top or bottom of the tire.


If it moves, the hub is bad then?

Me being a mechanic-newbie, is this something I want to attempt myself or do I just call it a day and take it to the mechanic and pay money that I just don't have at the moment?

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IffyG
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PostPosted: Tue Nov 29, 2011 9:42 pm    Post subject:   Reply with quote

If the hub moves when you push the top and bottom of the tire it's shot, but it's not possible to say everything is OK if it doesn't. If it's a wheel speed sensor, you need to have a scanner capable of reading the sensor (most cheap OBDII scanners can't do this). Take it to a reputable shop and they can tell you which one is bad if it's a sensor. I'd suspect it's the one that is making noise now, but there is only on way to be sure.

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