Clutch pedal sticking down

[DEREKCO]

Pedal assembly or 1of the 2 overcenter springs broken

[A80Avant]

Springs have been checked as well and they are working fine.

So far it has been still behaving

[Alistair E]

Master cylinder changed. All good again. I think I was correct in my reasoning behind why it was happening.

Thanks to Pete at Quattro Corner for the speedy delivery.

[A80Avant]

Ok, so it turned out that the pedal end stop when released had been perished and as the pedal moved further than it should, it pulled the master cylinder's internals further than it should and damaged it.

We managed to find ATE replacement repair kits and repaired one of the master cylinders and also fitted a temporary stop. It works again.

We also replaced the OEM line from the master to the slave cylinder with a aero quip type hose making the pedal more accurate. HOWEVER, it's much stiffer now and wife wont like it...

So I ordered the OEM hoses once again to probably go back to them

[John.]

Struggling to get my head round why the braided hose would make that much of a difference?.....but hopefully that is your issue!

[A80Avant]

The only assumption I can make is that the silicone hose may be able to absorb some of the pressure. Otherwise I cant either. It's the only thing different on the system now

[newsh]

The only assumption I can make is that the silicone hose may be able to absorb some of the pressure. Otherwise I cant either. It's the only thing different on the system now

Unless your replacement master is a different diameter?

[Error404]

[SteveH]

I changed my OE clutch hose with a braided hose years back and it did make a difference to the clutch bite point and pedal feel. Could it be the internal diameter of the replacement hose being different from OE?

[A80Avant]

I changed my OE clutch hose with a braided hose years back and it did make a difference to the clutch bite point and pedal feel. Could it be the internal diameter of the replacement hose being different from OE?

It could be. I dont know. But I can feel the engine's vibrations through the pedal now.

My calf is also beginning to look like Arnold's. Perhaps it's a sign that I need to switch to the OEM system.

Otherwise I'm pretty sure that it can be replicated

[A80Avant]

The master cylinder was OEM and bought through Audi tradition. The repair kit we found was meant to be for that master cylinder.

[John.]

I changed my OE clutch hose with a braided hose years back and it did make a difference to the clutch bite point and pedal feel. Could it be the internal diameter of the replacement hose being different from OE?

I would assume the pressure(and amount of fluid displaced) created by the MC will be the same at the slave irrespective of variations in hose bore size?...…..unless maybe the standard rubber hose was expanding/giving under pressure?

[Error404]

The aftermarket hose needs to be -4AN (1/4") or larger, or the hose acts like a flow control valve - the extra effort is required to overcome the restriction - think blowing down a small straw

[A80Avant]

I can tell you I'm already starting to have a hard granuloma under my large finger of my left foot. Plus my calf looks bigger too

[A80Avant]

Small update.

Ok the pedal was lightened a bit by adjusting the springs behind it.

Does anyone have a photo of the clutch pedal assembly as I need to see what the pedal stop looks like. It appears now that a lot of vibration is transmitted to the pedal on hard acceleration which makes me feel that there is something wrong with the car.

I cant find a part on etka that could be used as a stop, so I assume it's part of the assembly