RS6 C7 Brake Judder!

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zebede
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Re: RS6 C7 Brake Judder!

Post by zebede » Sat Jul 30, 2016 12:06 am

andywaddy wrote:
Bit_evl wrote:I took my RS6PE into Tetbury to finalise a glitch they found in PDI this week. Collected in March and 5500 miles on the clock. I have also suffered from the brake vibration as well in the last 1000 miles and asked them to look at it. They said that they had put the car on the MOT test and the vibration was just over the MOT guidance. I did not push them but they said that AUDI had agreed to replace the front discs. I just needed to sort a time. Great attitude and service.

I have been thinking through the possible cause and I suspect it is down to weight, power and autobox. I don't cane mine, I have not tracked it. I figure that if you use it well then the brakes will heat up as you drag 2000kgs down to a halt, the power means the autobox causes wild creep unless you hold it on the brakes so at every junction you sit hard on the brakes (with the stop-start as well) causing the heat to be trapped on the disc/pad. I have never warped a set of discs on any car in my life. I had the AMG E63S for 22k miles in two years and never even had the pads changed. I had a 550+ Bhp Skyline GTR33V and got to 108000 with one set of front discs at 80,000.

The only thing I can think of this is the challenge of holding it on the brakes at junctions, would ceramics make any difference on this situation ?
I think most people tend to either knock it into neutral if on a flat or Park if on a gradient to try and avoid sitting on the brakes.
Dudes,

Why would you do this in an Audi if you don't do it in any other brand?

Pure and simple this is surely not fit for purpose with steel brakes?

What on earth do the Germans do who are allowed a lot more speed?!

Nightmare with a 100k car

Dan
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Markp
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Re: RS6 C7 Brake Judder!

Post by Markp » Sat Jul 30, 2016 9:18 am

I do it in any heavy car that I drive fast. Sitting on brakes when hot is not a good idea.
It doesn't matter how fast you drive, same principles apply.
Go on any track day and brake care is drilled into you - whatever you drive.

I agree it would be simpler if you could ignore the advice, and some cars may allow this, but why not just follow it?

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Bit_evl
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Re: RS6 C7 Brake Judder!

Post by Bit_evl » Sat Jul 30, 2016 9:50 am

I raced Dolomites in the late 80's and had good brake practice drilled into me by the engineering team. Hence my highlighting this point. I take your point about using neutral and tend to where the stop will be longer (traffic lights) but it is not practical in motorway queues which are dynamic, traffic lights, motorway off ramps. I am not the last minute brake monster. When I pull off the A34 on the way home I drive the last 5-10 miles on small throttle angles and cool the drivetrain.

I do believe that the overall mixture of power, weight, auto is pushing the edge of this brake envelope. I do not have experience of ceramics as I have never needed them before so I do wonder how their performance envelope changes in this situation.

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Re: RS6 C7 Brake Judder!

Post by Markp » Sat Jul 30, 2016 12:05 pm

Sounds like sensible use and I would be upset if my car played up when used like that. But it hasn't. And 10000 miles so far.

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Re: RS6 C7 Brake Judder!

Post by zebede » Sun Aug 21, 2016 11:38 am

New discs driven to France and back with wife, kid and bikes on the roof, noise back and I've not even braked hard, not happy
Zebede

911 C4s cab - summer is fun :D

Panamera Turbo - fully loaded - gone
RS6 C7 - Panther Black - dodgy steering
911 GT3 - awesome but ate tyres
RS4 b8 - Black on Black with Black windows
911 Targa 4s 991 - Black with Grey Leather

fisherman3392
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Re: RS6 C7 Brake Judder!

Post by fisherman3392 » Sun Aug 21, 2016 6:01 pm

Hi

Have had similar issues with my C6. I put new discs and pads on 1000 miles ago and since then have developed a nasty steering wheel wobble. Audi warranty told me to P off as I had fitted them myself. Not happy. Had them skimmed with a pro cut and now no vibration when braking under 80mph but above that worse than ever !! Off to the dealer tomorrow to fork out another 700 for another pair of discs :thumbsdown: :thumbsdown:

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Re: RS6 C7 Brake Judder! - again

Post by jipettersen » Sun Jul 30, 2017 10:39 pm

New C7 PE in jan 2017 , only 5000 miles so far and all discs are are more and less warped !!! Left front is the worse.
Dealer will not cover it as its 4 days over the 6 months warranty and have taken it further with AG. They admit only 6 months warranty on this kind of parts. But they are not worn out and look like new, pads also . My view on this is - if the disc is warped before the pads is worn out there has to be a warranty case.
This is not to believe and has never happened to me and i count over 50 cars over the years.
Refuse to take the car back home before everything is fixed and cant stop thinking about the next time this happens.
Not very happy :-(

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MikeFish
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Re: RS6 C7 Brake Judder! - again

Post by MikeFish » Sun Jul 30, 2017 11:00 pm

jipettersen wrote:
Sun Jul 30, 2017 10:39 pm
New C7 PE in jan 2017 , only 5000 miles so far and all discs are are more and less warped !!! Left front is the worse.
Dealer will not cover it as its 4 days over the 6 months warranty and have taken it further with AG. They admit only 6 months warranty on this kind of parts. But they are not worn out and look like new, pads also . My view on this is - if the disc is warped before the pads is worn out there has to be a warranty case.
This is not to believe and has never happened to me and i count over 50 cars over the years.
Refuse to take the car back home before everything is fixed and cant stop thinking about the next time this happens.
Not very happy :-(
I can't be bothered to read back through all 4 pages here but are you sure the discs are warped and not just suffering from the usual RS issue of pad residue building up on the disc surface from not being used hard enough?

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Re: RS6 C7 Brake Judder!

Post by Darrenrs6 » Sun Jul 30, 2017 11:12 pm

jipettersen wrote:New C7 PE in jan 2017 , only 5000 miles so far and all discs are are more and less warped !!! Left front is the worse.
Dealer will not cover it as its 4 days over the 6 months warranty and have taken it further with AG. They admit only 6 months warranty on this kind of parts. But they are not worn out and look like new, pads also . My view on this is - if the disc is warped before the pads is worn out there has to be a warranty case.
This is not to believe and has never happened to me and i count over 50 cars over the years.
Refuse to take the car back home before everything is fixed and cant stop thinking about the next time this happens.
Not very happy :-(
Hi,
I've had a ton of brake issues with my RS6 also which I'm sure hasn't been down to driving style, as per yourself never experienced issues before with brakes over 10 previous motors, high and low performance.
Dealers have replaced full brake gear multiple times (under warranty) but still aren't at the bottom of the problem it seems.
I believe that the issue on my car is not with pad dust build up, but with something else going on - as I've been through this back to front.
Do you mind me asking - was there anything different prior to your problem?
E.g. Allot of a certain type of road/driving style etc, also any wheel changes or repairs at 3rd party garages, been through floods etc




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Cook
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Re: RS6 C7 Brake Judder!

Post by Cook » Sun Jul 30, 2017 11:32 pm

Yep mine too. Got discs and pads replaced replaced after 1 week by Perth audi as had judder. Came back great, they said replaced pads discs anf front hubs and 2 wheels as they were like ostritch eggs. Great then ... for a month, then slowly but surely the judder is back. Covered 9k in about 4 months now and this is over mainly motorway. They are terrible now but still look like new??? Going to strip down and have a look when back from holiday in france. Just done Birmingham - bruges- dijon - monaco and we hit monaco this afternoon. Wifes teeth are nearly falling out its got that bad !! Was thinking of skimming first as a place local to us does that, but how quick are deposits left on disc if its that ? Should we be doing emergency style stops regular to loose the pad build up??? Is there an aftermarket pad to consider ??? Getting annoyed with it TBH. Ruins a great car.
Cook

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gsc
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RS6 C7 Brake Judder!

Post by gsc » Mon Jul 31, 2017 12:12 am

Hate to say it but a typical RS brake problem across platforms. There are simple steps to slow the issue; don't stand at lights on the brake pedal, always put handbrake on. If parking on the flat leave handbrake off when in Park. After that skimming will clean the discs up. Not sure on aftermarket for the '6 but on other models EBC Redstuffs are good, Ferrodo DS another option. carbotech are immense but squeal like a pig on round town use.

RS brakes really do have to be abused to keep them in top working condition


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jipettersen
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Re: RS6 C7 Brake Judder!

Post by jipettersen » Mon Jul 31, 2017 10:43 am

Darrenrs6 wrote:
Sun Jul 30, 2017 11:12 pm
jipettersen wrote:New C7 PE in jan 2017 , only 5000 miles so far and all discs are are more and less warped !!! Left front is the worse.
Dealer will not cover it as its 4 days over the 6 months warranty and have taken it further with AG. They admit only 6 months warranty on this kind of parts. But they are not worn out and look like new, pads also . My view on this is - if the disc is warped before the pads is worn out there has to be a warranty case.
This is not to believe and has never happened to me and i count over 50 cars over the years.
Refuse to take the car back home before everything is fixed and cant stop thinking about the next time this happens.
Not very happy :-(
Hi,
I've had a ton of brake issues with my RS6 also which I'm sure hasn't been down to driving style, as per yourself never experienced issues before with brakes over 10 previous motors, high and low performance.
Dealers have replaced full brake gear multiple times (under warranty) but still aren't at the bottom of the problem it seems.
I believe that the issue on my car is not with pad dust build up, but with something else going on - as I've been through this back to front.
Do you mind me asking - was there anything different prior to your problem?
E.g. Allot of a certain type of road/driving style etc, also any wheel changes or repairs at 3rd party garages, been through floods etc




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Hi
There is no changes vs other cars. Wheels are original 21" with no earlier damages .
Ref driving style, with this car i have had a trailer connected 50% of the distance. I do track racing with my Ducati . So maybe that can be an issue since the speed is max 50-60 miles and soft use of brakes?
Spoke with a specialist (non VAG) in brakes today and he pinpointed i have to use (not abuse) these brakes. They dont have sufficient cooling in low speeds and tends to build up residue from pads. This can be part of the problem.

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DXB_RS6
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Re: RS6 C7 Brake Judder!

Post by DXB_RS6 » Mon Jul 31, 2017 12:58 pm

I have the same problem. Car is in service as we speak but they called me now and said the only problem with the car is that the propshaft needs replacing. They mentioned nothing about the brakes despite the same service centre telling me that I need new breaks 5 months ago in the last check up.. Which I still didn't replace.. Strange that they are now saying that I have no problems with the brakes.. He said he will call me back.. Let's see.

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RS6chris!
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Re: RS6 C7 Brake Judder!

Post by RS6chris! » Mon Jul 31, 2017 4:55 pm

You guys sure your wheels aren't shagged?

The 21"s buckle for fun?
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jipettersen
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Re: RS6 C7 Brake Judder!

Post by jipettersen » Mon Jul 31, 2017 5:36 pm

RS6chris! wrote:
Mon Jul 31, 2017 4:55 pm
You guys sure your wheels aren't shagged?

The 21"s buckle for fun?
Absolute not ! Vibration only when braking.
Dealer has measured the disks. Strange thing is that left front is warped. Right is not. Rear l/r is about to get warped to.

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