Clutch Master Cylinder

[Rusty]

Well done Audi, congratulations on designing the most useless linkage known to man - some crap rubber and a pressed metal cup - that'll never break. After 25k my clutch M/C linkage is on its way out again - the lovely smooth action replaced by a graunchy mess

Watch this space for a solution to this common issue.

[rizzono1]

I know the feeling a few months back I had just fitted a new slave from audi and it lasted 2 hours and they refuse to give me a replacement as I fitted it myself and want the whole car in for a diagnostic at 60 quid an hour for some muppet that knows f-all about my car as he was still wearing nappies when it was built to tell me the seal is burst in the slave. Car now running great with a cheap 30 quid alternative part from some dodgy parts shop.

[Error404]

Can the CQ20 / 3B item be used instead?

There never seems to be any problems with them, mines done 172k+ miles

[Rusty]

They're a different part number, 6 speed uses a different one to 5 speed, not sure what the differences are though. Thanks to Colsey it shouldn't be too long before I see the two items side by side though. Hoping to design a retrofit product that repairs or prevents damage in the first place and doesn't require removal or rework of the M/C

[Error404]

sounds like probably Audi changed the part to a cheaper on to cut costs on the ABY

[Rusty]

Aye, could be a number of things...

I'll have a good look at the mechanism, aiming to get something sorted for the £25-30 region that will solve the problem. Got a few ideas, it's just making something neat and tidy

[Mr G]

Hey there Rusty
Will your solution work for the RS2? mine broke yesterday.
For what it's worth, the part number is 8A0 721 401
Cheers

[terrybullwon]

What's the size of the master cylinder?

[Mr G]

Not sure I understand the question Terry

[terrybullwon]

The piston bore size

[Mr G]

OK you got me....I don't have a cookin clue

[Christophski]

I had a friend make a new one for me when mine snapped last year. Made of a great big bolt instead of plastic. Tbh I never saw what he did but he told me it will never break again

[Error404]

19mm bore AFAIK James

[terrybullwon]

so a 0.75" - 3/4" cylinder? and its got the off set flange correct?

[Error404]

not sure on the flange etc mate, but got the piston size of the ATE list