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E38 brake discs lifespan



 
 
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  #1  
Old April 6th 06, 09:31 AM posted to alt.autos.bmw
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Default E38 brake discs lifespan

Hi,

At a recent service my local dealer in Coventry said the front discs
and pads needed changing, so I gave the go-ahead. Thing is, they were
changed about two years ago (about 22k miles). That doesn't seem right,
I don't brake that hard.

Also, after changing the brakes, there is a judder on gentle braking at
high speed, which goes away after about 250 miles.

Same judder happened two years ago after the change of discs, but the
dealer couldn't find anything wrong. Should discs wear down this
quickly?

La Tercia Real
*Leave* NoSpam in e-mail to reply.

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  #2  
Old April 6th 06, 10:21 AM posted to alt.autos.bmw
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Default E38 brake discs lifespan


"La Tercia Real" > wrote in message
oups.com...
> Hi,
>
> At a recent service my local dealer in Coventry said the front discs
> and pads needed changing, so I gave the go-ahead. Thing is, they were
> changed about two years ago (about 22k miles). That doesn't seem right,
> I don't brake that hard.


Agreed. It doesn't seem right. I'd expect at least 2, maybe 3 pad changes
before discs needed replacing.
Maybe your dealer is changing them earlier than necessary.
Next time ask the dealer to give you the old discs so you can check the wear
for yourself.

> Also, after changing the brakes, there is a judder on gentle braking at
> high speed, which goes away after about 250 miles.


> Same judder happened two years ago after the change of discs, but the
> dealer couldn't find anything wrong.


Judder seems unusual, but as it goes away after about 250 miles I wouldn't
be concerned about it.
Mike.

  #3  
Old April 6th 06, 11:16 AM posted to alt.autos.bmw
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Default E38 brake discs lifespan


La Tercia Real wrote:
> Hi,
>
> At a recent service my local dealer in Coventry said the front discs
> and pads needed changing, so I gave the go-ahead. Thing is, they were
> changed about two years ago (about 22k miles). That doesn't seem right,
> I don't brake that hard.
>
> Also, after changing the brakes, there is a judder on gentle braking at
> high speed, which goes away after about 250 miles.
>
> Same judder happened two years ago after the change of discs, but the
> dealer couldn't find anything wrong. Should discs wear down this
> quickly?
>
> La Tercia Real
> *Leave* NoSpam in e-mail to reply.



It's usually a scam - they'll say something like "they're 80% worn so
shall we change them?" That means there's 20% left so another 5k miles
at least.

  #4  
Old April 6th 06, 12:08 PM posted to alt.autos.bmw
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Default E38 brake discs lifespan

La Tercia Real wrote:
> La Tercia Real
> *Leave* NoSpam in e-mail to reply.
>


hang on... leave nospam in? what's the point in that!?
  #5  
Old April 6th 06, 12:16 PM posted to alt.autos.bmw
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Default E38 brake discs lifespan

A little test...since I suspected that spammers would automatically
remove NoSpam in addresses, I set up two appropriate addresses, one
with and one without, to see which would get more spam.

Interesting that the NoSpam address *is* getting all the spam! So
admittedly not such a good idea!

LaTerciaReal
Do-what-you-like-to-the-e-mail-address to reply. :-)

  #6  
Old April 6th 06, 12:31 PM posted to alt.autos.bmw
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Posts: n/a
Default E38 brake discs lifespan


"La Tercia Real" > wrote in message
oups.com...
> Hi,
>
> At a recent service my local dealer in Coventry said the front discs
> and pads needed changing, so I gave the go-ahead. Thing is, they were
> changed about two years ago (about 22k miles). That doesn't seem right,
> I don't brake that hard.


I would expect the pads to need changing, especially if you do a lot of town
work. OTOH the disks should last nearer to 100k unless you are racing.

>
> Also, after changing the brakes, there is a judder on gentle braking at
> high speed, which goes away after about 250 miles.
>
> Same judder happened two years ago after the change of discs, but the
> dealer couldn't find anything wrong.


This will just be a very slight unevenness or misalignment of the disc, they
can't be perfect. As you point out a couple of hundred miles and this will
be smoothed out, so this is nothing to worry about.


> Should discs wear down this quickly?


NO

>
> La Tercia Real
> *Leave* NoSpam in e-mail to reply.
>



  #7  
Old April 6th 06, 12:39 PM posted to alt.autos.bmw
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Posts: n/a
Default E38 brake discs lifespan

La Tercia Real wrote:
> A little test...since I suspected that spammers would automatically
> remove NoSpam in addresses, I set up two appropriate addresses, one
> with and one without, to see which would get more spam.
>
> Interesting that the NoSpam address *is* getting all the spam! So
> admittedly not such a good idea!


That was pretty predictable. That is the whole point of munged email
addresses. They require a person to manually un-mung them...

--
-Fred W
  #8  
Old April 7th 06, 09:23 PM posted to alt.autos.bmw
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Default E38 brake discs lifespan

You should have had the rotors measured for run-out:

http://www.ultimategarage.com/brakekits.htm

 




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