On Wed, 3 Sep 2008 05:04:34 -0700, "Uncle_vito" >
wrote:

>Brake rotors on German cars generally wear to where they get narrower in
>thickness. Unlike American cars, the German rotors are intended to wear.
>After a minimum thickness, they need to be replaced. Likely about every
>second brake job. The maintenance manual has a minimim thickness that
>should be checked with every brake job. If the rotors have gotten too thin,
>then their warpage is easily explained.
>
>Change the rotors and pay attention to their thickness at each brake pad
>change and you should have no problems.
>

Also check and replace if needed the tie rod back to the chassis as this will
also cause judder on braking.


>Vito
>
>
>"holdgaj" > wrote in message
...
>On 28 Aug, 20:12, (Scott Dorsey) wrote:
>> holdgaj > wrote:
>> >I have vibration of the sterring wheel on braking on an E39. There's
>> >no vibrattion through the brake pedal. Just had a diagnosis from a
>> >garage - "brake discs (rotors) need replacing". On reading the Brake
>> >FAQ I see that worn suspension bushes can cause vibration of the
>> >stereing wheel. The vibration is worse at higher speeds. I would have
>> >thought that warped rotors would be felt through the pedal as well as
>> >the steerrng wheel. I'm on a tight budget, and don't want to replace
>> >the brake discs unecessarily. Can someone confirm that warped rotors
>> >would be felt through the brake pedal ? Or not ? I'd also be
>> >interested in the difficulty (i.e. cost) of replacing the suspension
>> >bushes *& which ones need to be replaced.
>>
>> >Its a E39 528i 50K miles.
>>
>> Your rotors are bad, yes. Change them; it's an easy job and not too
>> expensive to do.
>>
>> When did you last do a brake job? At 50k, you should be coming up ready
>> for a whole pile of preventative maintenance.
>> --scott
>> --
>> "C'est un Nagra. C'est suisse, et tres, tres precis."
>
>Could you give me an idea of exactly what preventitive maintainance I
>should be doing - as mentioned above, I might as well have the garage
>do it at thye same time they do the rotors ...
>
>
--

Sir Hugh of Bognor

The difference between men and boys is the price of their toys.

Intelligence is not knowing the answer but knowing where and how to find it!

Hugh Gundersen

Bognor Regis, W.Sussex, England, UK