brakes grabbing ?
Thread Starter
AudiWorld Senior Member
Joined: Feb 2005
Posts: 758
Likes: 8
From: New Zealand
brakes grabbing ?
got the 200 turbo auto out for a drive after 2 months, and it feels like the brakes are grabbing .. 
drove it less than 3 miles, but it started to stop like a elephant, no rolling at all, got it home and THREE wheels (discs) were hot azzz .....
drove it less than 3 miles, but it started to stop like a elephant, no rolling at all, got it home and THREE wheels (discs) were hot azzz .....
AudiWorld Senior Member
Joined: Mar 2002
Posts: 784
Likes: 0
Dude, it sounds like your master cylinder has gone to the grave.
How to test this?... take bottle of frigid ..I mean ICE cold water with you on the next trip out.
when it starts acting up...pull over right away...pour the cold water over your master cylinder..you should feel the brakes release.
If this is the case...don't wait too long!!! Change it.
I have had at least two cases like this...this is a highly dangerous situation.
By the way I have since done some improvements on mine..added an additional fan in front of the radiator module and a heatshield covering the master cylinder...I highly recommend this for ALL!!
How to test this?... take bottle of frigid ..I mean ICE cold water with you on the next trip out.
when it starts acting up...pull over right away...pour the cold water over your master cylinder..you should feel the brakes release.
If this is the case...don't wait too long!!! Change it.
I have had at least two cases like this...this is a highly dangerous situation.
By the way I have since done some improvements on mine..added an additional fan in front of the radiator module and a heatshield covering the master cylinder...I highly recommend this for ALL!!
AudiWorld Senior Member
Joined: Mar 2002
Posts: 784
Likes: 0
master cylinder rebuild
Sorry for another reply,
hey i was just surfing around and found on the german 100 forum some intereting information.
Seems someone in germany is having the same problem..as mentioned I think this happens often...anway the discusion there seems to focus on the point that some people think this is happing (brakes blocking) due to dirty or contaminated oil in the system ..this dirt gets into the seals, and either blocks or wears out some parts and creats friction between some parts...heat is once again a vital part in this whole problem.
The test I posted above (cold water over the main cylinder) should prove this issue.
There is a repair kit from what I just saw as well for the main cylinder..which I did not know was even possible to rebuild...see the picture here below from this guy in germany which took it apart.
<img src="http://forum.group44.de/download/file.php?id=7652&t=1">
Here is a link to a company in the UK whick sells the kit.
http://www.biggred.co.uk/cylinderrepairshop.html
BRM1702 BiggRed Master Cylinder Repair Kitt 16.25 GBP
I am sure there must be a kit liek this in the US...maybe EBAY???
Allot cheaper then buying a new cylinder that is for sure.
hey i was just surfing around and found on the german 100 forum some intereting information.
Seems someone in germany is having the same problem..as mentioned I think this happens often...anway the discusion there seems to focus on the point that some people think this is happing (brakes blocking) due to dirty or contaminated oil in the system ..this dirt gets into the seals, and either blocks or wears out some parts and creats friction between some parts...heat is once again a vital part in this whole problem.
The test I posted above (cold water over the main cylinder) should prove this issue.
There is a repair kit from what I just saw as well for the main cylinder..which I did not know was even possible to rebuild...see the picture here below from this guy in germany which took it apart.
<img src="http://forum.group44.de/download/file.php?id=7652&t=1">
Here is a link to a company in the UK whick sells the kit.
http://www.biggred.co.uk/cylinderrepairshop.html
BRM1702 BiggRed Master Cylinder Repair Kitt 16.25 GBP
I am sure there must be a kit liek this in the US...maybe EBAY???
Allot cheaper then buying a new cylinder that is for sure.
AudiWorld Newcomer
Joined: Mar 2010
Posts: 8
Likes: 0
just buy a new master cylinder
I had the same problem with my 5000S, concluded that it had to be the seals in the master brake cylinder, bought a new master cylinder and had it installed. $166 for the part, $109 for the work - not really dramatic.
Will post here if this did not solve the problem, but I'm optimistic that I got rid of my unintended deceleration problem...
Will post here if this did not solve the problem, but I'm optimistic that I got rid of my unintended deceleration problem...
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