Hey guys, hope you're all doing well.
The problem I have is with my mates 1999 Audi s3 1.8t petrol (150,000 miles.)
My mate brought the car to me saying his clutch pedal would go all the way to the floor while driving, if he left it for a few hours he could pull the pedal back up and it would work for a few miles before going again. When it drops it's not a slow gradual drop to the floor- it flys to the floor with a loud thud.
I started by checking for any leaks in the hydraulic system and checked the fluid level which was fine and no leaks could be found.
I then bled the system using an eezi bleed to no avail. At this point, the clutch pedal would not build up any pressure at all not even after leaving it for a few hours.
Then I tried bleeding it in the traditional way with my mate- no joy.
Decided to swap the clutch master cylinder behind the pedal, bled the system again and the pedal finally gained pressure and all was well.
We took it for a test drive and the clutch was operating perfectly- until about 5 miles up the road when the pedal dropped again
The fluid level is still fine, doesn't seemed to have dropped at all.
Unfortunately for us the slave cylinder is inside the gearbox, am I consigned to taking the box out and changing the slave cylinder? Or am I overlooking something?
Sorry for the essay, and I know it's an Audi not a Renault, but any suggestions would be appreciated. Thanks