[urq] MB brake question

Thu May 22 10:51:17 PDT 2008

    Hi guys,
I'm sitting at the work shop waiting for the mechanic to change the MC! I'm hoping that the brake problem is solved with it. 

at the same time they will change a drive shaft and the oil sump! The previous work shop destroyed the threads on it when they changed the oil, and of course they would not take responsibility! 

Can you imagine how I'm looking forward to the 200km drive home along twisty b-roads!

cheers,
Johan
Helsinki, Finland
-88 MB 

-----Ursprungligt meddelande-----
Från:	"urq-bounces at audifans.com" <urq-bounces at audifans.com> för	"Schaible, David" <David.Schaible at jrspharma.com>
Skickat:	den 2 april 2008 20:53
Till:	"urq at audifans.com" <urq at audifans.com>
Angående:	Re: [urq] MB brake question

That sounds a lot like what happened to my 83, I replaced the MC and it
was ok

Other than your brakes not working properly......how do you like them,
what setup are you running, I am curious as to what they changed the
original design to for your 88.....mine has the g54s with a less than
optimal MC that has too much front bias....and no adjustment.  There are
better MC options if you have an old style and are going to replace it.

-----Original Message-----
From: Patrick Carlier [mailto:p.carlier at pandora.be] 
Sent: Wednesday, April 02, 2008 12:10 PM
To: Johan Hisinger; urq at audifans.com
Subject: Re: [urq] MB brake question

It's the master cilinder !
I've seen it before on an audi200 ( 5KQ ) .
The brakes would bind occasionally , but only in the summer with
the airco engaged . Without the airco the problem didn't occur .
It has to be the extra heat that somehow blocked the master cininder .

If the brakes binded , a wet cloth around the master cilinder to cool it
would release them immediatly .

Opening , cleaning and greasing the master cilinder didn't help .
The internals looked perfect though .
To be absolutely sure , I've rebuild the four calipers .
Didn't help either .

So I finally put on another master cilinder , and the problem was gone
and has never occured again .

Sadly there's no gasket kit available so replacing it was the only
option .

Pat

----- Original Message -----
From: "Johan Hisinger" <milisen at hotmail.com>
To: <urq at audifans.com>
Sent: Wednesday, April 02, 2008 8:58 AM
Subject: [urq] MB brake question

> Hi Guys,
>
> I have a small problem, I beg your pardon if this has allready been
discussed on the list.
>
> My -88 MB does OCCASIONALLY the following:
>
> last summer on my way home sitting in heavy traffic, only on hot
summers
days, and even then very occasionally, at first the brake pedal started
to
feel a bit firm. I had no problem with lack of brake assist though and
the
pedal travel was normal.
>
> When I got out on the motorway (about 80-100 km/h), and after a few
minutes drive the pedal went almost all the way to the floor, before the
brakes worked, and at this stage there were no assist on them. I have
never
had a problem with brakes locking up.
>
> This happened about 3-4 times during whole last summer, and I drove
the
car to work every day.
>
> The problem ought not be with the bomb while it is quite new. I cannot
remember how many times I can press the pedal before it gets hard, from
the
top of my head approx. 20-30 times.
>
> The weird things are that this happened very occasionally and only
when it
was hot, after sitting in heavy traffic, never during a traffic jam.
>
> Any ideas?
>
> Cheers,
> Johan
> Helsinki, Finland
> -88 MB with NEW window winders and studded tires
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