[A4] Are drilled rotors really loud?

[gordies garage]

You can get an idea if it is a wheel bearing when turning.  The 'roar' 
should increase/decrease during turns.
If it is a wheel bearing, it will last a long time 'roaring' before it 
finally fails.  When it fails, the wheel comes off.
When the car is jacked up you can try to move the suspect wheel as if you 
were trying to change the camber and if it moves, your bearing needs 
replaced.
I've had slotted and drilled rotors before and there is no sound like the 
roar of a rear wheel bearing.
HTH

Gordie
'98 A4TQM (replaced 3 rear wheel bearings, 0 front)
'03 A6 Avant
--------------------------------------------------
From: "Nicholas Stock" <nickstock at gmail.com>
Sent: Tuesday, November 30, 2010 12:45 AM
To: "Richard Hurt" <rnhurt at gmail.com>
Cc: "A4 Mailing List" <a4 at audifans.com>
Subject: Re: [A4] Are drilled rotors really loud?

> I have drilled rotors on my Audi and there's been no difference in noise 
> that I've noticed. Most road noise is attributable to the tires. High 
> performance tires are usually pretty noisy, well at least in my 
> experience...
>
> Sent from my iPhone
>
> On Nov 29, 2010, at 21:28, Richard Hurt <rnhurt at gmail.com> wrote:
>
>> Hmm...now that you mention it I might ask the same thing.  My "wheels" 
>> have
>> been roaring for years and I've always been bothered by it and wanted to 
>> fix
>> it but I can't find the problem.  Besides, it should get worse at some 
>> point
>> if its bearings or some other hard part.  Right?  The noise is a low 
>> rumble
>> that increases with vehicle speed but doesn't change with engine speed or
>> road surface.  I can't seem to pinpoint a wheel and even listening out 
>> the
>> window (off of a curb or fence alongside the road) doesn't help.
>>
>> I replaced my rotors with slotted ones years ago.  The only problem is 
>> that
>> I  can't remember if they roared before the new rotors or not.  :/
>>
>> Sorry, I'm not really any help to your question but it has raised that
>> question in my mind about my own wheels and I would be interested in any
>> replies you get.
>>
>> --
>> Later...
>>  Richard           http://KangarooBox.com - We make IT simple!™
>>
>>
>> On Mon, Nov 29, 2010 at 8:30 PM, Sean Reifschneider <jafo at jafo.ca> wrote:
>>
>>> -----BEGIN PGP SIGNED MESSAGE-----
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>>>
>>> The reason I ask is there's this 2007 RS4 with 70K miles on it tempting 
>>> me
>>> locally.  But it sounds like the wheel bearings are going.  It sounds
>>> almost
>>> exactly like my 1997 A4 2.8Q that has 200K miles on it.  So I got to
>>> thinking,
>>> maybe it's not the wheel bearings but it's the drilled rotors?
>>>
>>> Any thoughts?
>>>
>>> Hope everyone who celebrates them is having a good start to their 
>>> holidays.
>>>
>>> Sean
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