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  1. #1
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    Clutch slave cylinder or master cylinder ?

    Hi people ,

    I own a 2003 1.8t quattro. The car has recently developed a problem with the clutch. I have a had a read through some of the threads and it sounds like it is quite a commom problem.

    The clutch sometimes seems to loose pressure meaning that I need to push the pedal all the way to the floor and it still seems as if it is not fully engaged as it is difficult to select gears. The pedal will also not return properly from time to time and I need to pull it back up with my foot.

    If i pump the pedal a few times it builds the pressure back up and it is ok for a while.

    I have had a look under the car and it seems pretty dry ie no fluid leaking out from the gearbox and the fluid in the reservoir is at the correct level.

    Do you think it is the slave cylinder ? . . . .

    I dont fancy taking the gearbox off !!

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  3. #2
    danotto's Avatar
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    sounds like slave cylinder or master cylinder,master cylinder is under the clutch pedal,so not too bad to change,if not try and bleed the clutch as it is hydraulic.maybe a seal or something has perished and is allowing air into the system.Just a thought.
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  4. #3
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    Thanks for your reply Danotto.

    After bleeding clutch several times and replacing master cylinder it felt better.

    I have just returned from holiday so the car has been sitting idle for 2 weeks and has no clutch at all !!

    I have tried bleeding it but the fluid is full of bubbles and I am getting no where with it !!

    Please someone help !

  5. #4
    rickparmar's Avatar
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    Happened to me, i changed the master cylinder didnt fix the problem, so changed the slave cylinder,

    I have a huge feeling that your slave cylinder is gone
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  6. #5
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    So have I :-(

    Did you replace the clutch and flywheel when you had the slave cylinder replaced ?

  7. #6
    rickparmar's Avatar
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    Quote Originally Posted by ColinS View Post
    So have I :-(

    Did you replace the clutch and flywheel when you had the slave cylinder replaced ?
    Yup just made sense to do that as well,

    spent total about 800ish i think or less
    ~ ~ ~2003 Audi S3 BAM ~ Ming Blue ~ 18" BBS Alloys ~ Heated Black Leather ~ Forge DV ~ RNS-E ~ denison ipod link~ parrot mk6100 bluetooth ~ ~ ~

    Still need Remap

    2007 Audi S3 8L
    2005 Audi A3 1.6 sport grey with climate control
    2003 Audi A3 1.6 sport black without climate contol

  8. #7
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    Thanks for your reply

    So its gearbox off time now.

  9. #8
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    I take it you cannot change the slave with the gearbox in place on the A3 then?

  10. #9
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    UNfortuately not...on an 8L A3 to change the slave cylinder (which also encompasses the clutch release bearing) its a full front suspension subframe drop and gearbox out job...put it all back together and then full susp realignment recommended. Typically minimum of 5ish hours labour...could be up to 7ish hours...therefore easily 500+ quid even at an independent...never mind an Audi stealer.

  11. #10
    Ian W's Avatar
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    Sounds like what happend to mine, my clutch pedal started dropping to the floor, a week later I had no pedal at all !

    As people have said its basically a full box off / new slave cylinder / clutch / flywheel job

  12. #11
    h100vw's Avatar
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    Quote Originally Posted by evotista View Post
    UNfortuately not...on an 8L A3 to change the slave cylinder (which also encompasses the clutch release bearing) its a full front suspension subframe drop and gearbox out job...put it all back together and then full susp realignment recommended. Typically minimum of 5ish hours labour...could be up to 7ish hours...therefore easily 500+ quid even at an independent...never mind an Audi stealer.
    Not quite right.

    The slave cylinder is on the outside of the box on an A3. The S3 has the slave cylinder is on the inside of the bell housing.

    Gavin

  13. #12
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    I had a similar fault on a customers car.
    After many parts changed, turned out to be the connecting piece with the bleed nipple, just before the slave cylinder. It was leaking allowing air into the system.

  14. #13
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    My S3 8L has just emptied the clutch fluid all over the road.

    I'm yet to be able to take a look underneath, but has anyone had such a dramatic emptying before?

  15. #14
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    HI I have the same problem. no clutch at all... I found no leak on the pipes and after a dip search i found leak on slave cylinder. but I was not a 100% sure until I drive it and I fount that clutch plate spin.
    that mean that dot 4 is inside the clutch<slave cylinder leak> I need to take gearbox out and replace clutch plate and rest parts. also I will put a lightened fly wheel to increase torque.
    this is my advice for you ColicS
    thanks

 

 

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