Audi A6 + RS6 (1997 - 2004) - 1999 1.9 A6TDI Avant Braking effort | Technical matters | Back Room Forum

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Fri 11 Jul 2008 16:47

1999 1.9 A6TDI Avant Braking effort - mark999

My mate has been complaining recently of the poor response from the brakes of his A6 Avant. It has new pads and disks all round and has had the brakes bled.
I've driven it and it does seem to need considerable effort on the brake pedal, compared to my dads old A4.
I'm wondering if this is the master cylinder or servo problems

Any advice would be appreciated

Mark

Edited by Dynamic Dave on 11/07/2008 at 19:50

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Fri 11 Jul 2008 17:05

1999 1.9 A6TDI Avant Braking effort - Screwloose

Mark

Any sign of water lying under the servo?

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Sat 12 Jul 2008 00:42

1999 1.9 A6TDI Avant Braking effort - Peter D

If you leave the car over night and then try the brakes without starting the engine and the brakes are poor then as Screwloose I suspect the servo has been under water due to blocked drain bungs and the servo has excessiv corrossion on the lower edge. Expensive. !!! Regards Peter

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Sat 12 Jul 2008 16:39

1999 1.9 A6TDI Avant Braking effort - mark999

Thanks I'll get him to check and report back

Mark

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Sat 12 Jul 2008 21:56

1999 1.9 A6TDI Avant Braking effort - Hamsafar

Any funny noises such as wheezing or squelching when the pedal is first pressed in the morning? This is indicative of the above, but even if you don't hear it, I would still suspect the above.

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Mon 14 Jul 2008 20:49

1999 1.9 A6TDI Avant Braking effort - mark999

Theres definitely water under the servo which he's drained off, he can't find any rust
on the servo . I'll get him to check the other issues.

Thanks,
Mark

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Tue 15 Jul 2008 11:41

1999 1.9 A6TDI Avant Braking effort - mark999

Apparently theres a lot of travel on the brake pedal after leaving the car overnight which reduces after 4 pumps

Mark

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