Clutch slave cylinder or master cylinder ?

ColinS

Registered User
Joined
Jun 14, 2008
Messages
25
Reaction score
0
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 !!
 

danotto

VAG HUNTER
Joined
Jun 23, 2007
Messages
1,090
Reaction score
1
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.
 

ColinS

Registered User
Joined
Jun 14, 2008
Messages
25
Reaction score
0
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 !
 

rickparmar

Registered User
Joined
May 18, 2004
Messages
2,404
Reaction score
28
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
 

ColinS

Registered User
Joined
Jun 14, 2008
Messages
25
Reaction score
0
So have I :-(

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

ColinS

Registered User
Joined
Jun 14, 2008
Messages
25
Reaction score
0
Thanks for your reply

So its gearbox off time now.
 

Broken Byzan

Photographic Moderator
Staff member
Moderator
VCDS Map User
Joined
Apr 26, 2004
Messages
13,202
Reaction score
471
I take it you cannot change the slave with the gearbox in place on the A3 then?
 

evotista

Registered User
Joined
Aug 27, 2003
Messages
118
Reaction score
2
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.
 

Ian W

Registered User
Joined
Oct 27, 2007
Messages
1,320
Reaction score
265
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
 

h100vw

Registered User
Joined
Aug 6, 2006
Messages
218
Reaction score
2
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
 

PW-Motorsport

Registered User
Joined
Jun 13, 2006
Messages
395
Reaction score
0
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.
 

leon13

Registered User
Joined
Feb 14, 2011
Messages
23
Reaction score
4
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?
 

ttaalliibb

Registered User
Joined
Feb 9, 2013
Messages
24
Reaction score
0
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
 

Thabani Nyati

Registered User
Joined
Jun 27, 2017
Messages
2
Reaction score
0
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.
Hi.
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.
Hi . How did you solve the issue on your customers car.I have an audi a3 and after full clutc job the clutch system isnt holding any pressure whatsoever. Any help appreciated.
 

<tuffty/>

Badger 5 Edition...Its all about the flow...
Staff member
Moderator
Joined
Sep 14, 2008
Messages
24,809
Reaction score
6,037
Hi.

Hi . How did you solve the issue on your customers car.I have an audi a3 and after full clutc job the clutch system isnt holding any pressure whatsoever. Any help appreciated.

The bleed nipple section will need replacing (PN I believe is 1J0721468C)

<tuffty/>
 

SHUk

Once Bitten Forever Smitten =]
Joined
Jan 17, 2014
Messages
357
Reaction score
29
Is there a how to guide for replacing the slave cylinder on an Audi a3
 

<tuffty/>

Badger 5 Edition...Its all about the flow...
Staff member
Moderator
Joined
Sep 14, 2008
Messages
24,809
Reaction score
6,037

SHUk

Once Bitten Forever Smitten =]
Joined
Jan 17, 2014
Messages
357
Reaction score
29
Tuffet saves the day!!! =[]
 

<tuffty/>

Badger 5 Edition...Its all about the flow...
Staff member
Moderator
Joined
Sep 14, 2008
Messages
24,809
Reaction score
6,037
No he didn't... I did...

<tuffty/>
 

SHUk

Once Bitten Forever Smitten =]
Joined
Jan 17, 2014
Messages
357
Reaction score
29
How can I use vagcom to bleed the system?
 

TacMonkey

Registered User
Joined
Jan 30, 2018
Messages
1
Reaction score
1
Tuffty, you are my hero. Was facing a 1000-3000 euro repair cost for my A3 8L 2000, since the clutch gave out. Maybe that manual is all mI need for som DIY
 
Top