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Mk6 2.4 rwd slave cylinder

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Mk6 2.4 rwd slave cylinder

Postby Ash90 » Fri May 30, 2025 3:30 pm

Hello guys to cut a long story short I’m onto about my third slave cylinder they keep failing/popping and losing fluid dripping through the bottom of the gearbox what could be causing this when it’s replaced all is fine for a couple of months then back to square one replacing and bleeding the clutch any advice will be much appreciated .
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Re: Mk6 2.4 rwd slave cylinder

Postby knobby1 » Fri May 30, 2025 9:26 pm

Ash90 wrote:Hello guys to cut a long story short I’m onto about my third slave cylinder they keep failing/popping and losing fluid dripping through the bottom of the gearbox what could be causing this when it’s replaced all is fine for a couple of months then back to square one replacing and bleeding the clutch any advice will be much appreciated .


Must be the Mk6 2.4 135 with the 6 speed gearbox..?? Has the clutch/flywheel been replaced recently..??

Lord Knobrot
2008 2.4L RWD 170+PS 6-speed 350 LWB High Roof..."Full Poverty Spec".

When I die, I want to go peacefully in my sleep like my Grandfather, not screaming like the passengers in his car..!
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Re: Mk6 2.4 rwd slave cylinder

Postby Ash90 » Sat May 31, 2025 7:51 pm

knobby1 wrote:
Ash90 wrote:Hello guys to cut a long story short I’m onto about my third slave cylinder they keep failing/popping and losing fluid dripping through the bottom of the gearbox what could be causing this when it’s replaced all is fine for a couple of months then back to square one replacing and bleeding the clutch any advice will be much appreciated .


Must be the Mk6 2.4 135 with the 6 speed gearbox..?? Has the clutch/flywheel been replaced recently..??

Lord Knobrot


It’s the mk6 2.4 115 with 5 speed box buddy it’s never been changed in my ownership of the truck it seems perfectly fine when the slave is fully functioning biting point is almost as you just lift the pedal and never been any sign of slipping at all the fella I bought the truck off did say it had just been replaced but I never take anyone’s word for it without proof I’m guessing it will of been done it’s on almost 150k

Do you think it could be over stretching because the clutch has worn but wouldn’t my biting point be really high if it was I’m at a bit of a loss trying to figure this one out I mean I don’t mind having the box out of it if I have to but it’s a last resort thing

I have a few other bits I’m doing to it whilst it’s off the road I’ve had the egr out and cleaned it all think I’ll order a blanking plate and blank it off and I have smoke on start up coming through the vents and the smell of smoke when I’m driving checked the manifold for leaks and nothing I’ll plug it in tomorrow see if anything pops up on the snap on diagnostic and go from there
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Re: Mk6 2.4 rwd slave cylinder

Postby knobby1 » Sat May 31, 2025 9:20 pm

Ash90 wrote:
knobby1 wrote:It’s the mk6 2.4 115 with 5 speed box buddy it’s never been changed in my ownership of the truck it seems perfectly fine when the slave is fully functioning biting point is almost as you just lift the pedal and never been any sign of slipping at all the fella I bought the truck off did say it had just been replaced but I never take anyone’s word for it without proof I’m guessing it will of been done it’s on almost 150k

Do you think it could be over stretching because the clutch has worn but wouldn’t my biting point be really high if it was I’m at a bit of a loss trying to figure this one out I mean I don’t mind having the box out of it if I have to but it’s a last resort thing

I have a few other bits I’m doing to it whilst it’s off the road I’ve had the egr out and cleaned it all think I’ll order a blanking plate and blank it off and I have smoke on start up coming through the vents and the smell of smoke when I’m driving checked the manifold for leaks and nothing I’ll plug it in tomorrow see if anything pops up on the snap on diagnostic and go from there


Ok...a bit strange as you said you were losing fluid through the bottom of the gearbox which threw me into thinking it was a 6 speed...

With the 5 speed, is the clutch lever bent or cracked..?? There were a couple of different clutches and slaves for them I believe...depending on which flywheel and clutch was fitted...single or dual mass etc..

http://www.catcar.info/ford/?lang=en&l= ... gyMjQrMjcy


http://www.catcar.info/ford/?lang=en&l= ... NCsyNzI%3D

http://www.catcar.info/ford/?lang=en&l= ... grMA%3D%3D

Lord Knobrot
2008 2.4L RWD 170+PS 6-speed 350 LWB High Roof..."Full Poverty Spec".

When I die, I want to go peacefully in my sleep like my Grandfather, not screaming like the passengers in his car..!
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Re: Mk6 2.4 rwd slave cylinder

Postby Ash90 » Sat May 31, 2025 10:12 pm

knobby1 wrote:
Ash90 wrote:
knobby1 wrote:It’s the mk6 2.4 115 with 5 speed box buddy it’s never been changed in my ownership of the truck it seems perfectly fine when the slave is fully functioning biting point is almost as you just lift the pedal and never been any sign of slipping at all the fella I bought the truck off did say it had just been replaced but I never take anyone’s word for it without proof I’m guessing it will of been done it’s on almost 150k

Do you think it could be over stretching because the clutch has worn but wouldn’t my biting point be really high if it was I’m at a bit of a loss trying to figure this one out I mean I don’t mind having the box out of it if I have to but it’s a last resort thing

I have a few other bits I’m doing to it whilst it’s off the road I’ve had the egr out and cleaned it all think I’ll order a blanking plate and blank it off and I have smoke on start up coming through the vents and the smell of smoke when I’m driving checked the manifold for leaks and nothing I’ll plug it in tomorrow see if anything pops up on the snap on diagnostic and go from there


Ok...a bit strange as you said you were losing fluid through the bottom of the gearbox which threw me into thinking it was a 6 speed...

With the 5 speed, is the clutch lever bent or cracked..?? There were a couple of different clutches and slaves for them I believe...depending on which flywheel and clutch was fitted...single or dual mass etc..

http://www.catcar.info/ford/?lang=en&l= ... gyMjQrMjcy


http://www.catcar.info/ford/?lang=en&l= ... NCsyNzI%3D

http://www.catcar.info/ford/?lang=en&l= ... grMA%3D%3D

Lord Knobrot


Cheers knobby much appreciated I will get some pics tomorrow and try to explain it a little better but it’s got me baffled
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Re: Mk6 2.4 rwd slave cylinder

Postby scas » Sun Jun 01, 2025 12:12 pm

i had the same thing a few years ago on a 115, went through 4 slaves over a year and a half. i changed the perfectly good borg and beck clutch, which id thrown in 2 years before and replaced it with a valeo and it never happened again. it was only when i had the new clutch that i realised the borg and beck clutch was idioticly heavy, which i presume was straining and eventually bursting the all plastic slave cylinder.
06 mk6 2.4 di 115 remapped by martyn
04 mk6 2.4 di 115 remapped by martyn
04 mk6 2.4 di 90
05 mk6 2.4 di 115
new 06 mk6 2.4 di 115
new 00 mk6 2.4 di 125
can you see a pattern
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Re: Mk6 2.4 rwd slave cylinder

Postby Ash90 » Sun Jun 01, 2025 8:11 pm

scas wrote:i had the same thing a few years ago on a 115, went through 4 slaves over a year and a half. i changed the perfectly good borg and beck clutch, which id thrown in 2 years before and replaced it with a valeo and it never happened again. it was only when i had the new clutch that i realised the borg and beck clutch was idioticly heavy, which i presume was straining and eventually bursting the all plastic slave cylinder.


Thanks buddy think I’m just gonna have the gearbox out and have a look see what’s going on been getting a bit of a judder lately as well when setting off and going into second I’m guessing that’s to do with the slave failing though , spent this afternoon cleaning the egr valve and had the inlet off aswell and got all the gunk and crap out of that make a blanking plate tomorrow put all that back together and just keep going over it trying to put off having that box out but it’s gonna have to be done in the end I think may as well replace the clutch while I’m in there no matter the state of it
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Re: Mk6 2.4 rwd slave cylinder

Postby scas » Mon Jun 02, 2025 10:18 pm

make a blanking plate tomorrow,
no need to, just pull the vacuum hose of the egr and stick a screw in the rubber hose, same thing, less work.
06 mk6 2.4 di 115 remapped by martyn
04 mk6 2.4 di 115 remapped by martyn
04 mk6 2.4 di 90
05 mk6 2.4 di 115
new 06 mk6 2.4 di 115
new 00 mk6 2.4 di 125
can you see a pattern
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Re: Mk6 2.4 rwd slave cylinder

Postby T350camper » Tue Jun 03, 2025 3:05 pm

I made a blanking plate for mine out of 1mm stainless steel (I had a bit of scrap lying around). Used the metal gasket as a template. It wasn't difficult and because the vacuum hose is still attached it doesn't look bypassed when the MOT tester has his beady eyes on it :? Runs so much better without breathing exhaust fumes!
Wisdom comes with age...but sometimes age comes alone :shock:

2006 Mk6 T330 135bhp 2.4TDCI
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Re: Mk6 2.4 rwd slave cylinder

Postby metalworker0 » Tue Jun 03, 2025 3:38 pm

not up to scratch with emissions test ..do they do a nox test with .
google says

For a diesel car to meet Euro 4 it must emit no more than 0.25g/km of NOx gases, while a petrol car can emit no more than 0.08g/km. Euro 4 was introduced in 2005 and applied to all new cars sold from January 2006.

and its the EGR that brings this down ..or so i'm told . so mot ..is likely to fail? not from the looks but from what the testing machine is reading.

so quickly reversible is what you want ..and that is the bung up the vac pipe method by the looks of it

Your mk6 Euro4 egr looks like my connects one ..only you have a serviceable un-bolt-able unit ,.my connects is part of the manifold!

all the best.mark
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Re: Mk6 2.4 rwd slave cylinder

Postby Ash90 » Thu Jun 05, 2025 2:03 pm

MOT is due in a week or less so we will soon find out on blanking the egr :) not had chance to look over this slave cylinder/gearbox weather in the northeast has been terrible just been tidying a few bits up when the weather allows me to Thanks guys I appreciate the input totally . Ash
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Re: Mk6 2.4 rwd slave cylinder

Postby T350camper » Thu Jun 05, 2025 4:50 pm

I asked one of the MOT testers where I work about the emission test for an MOT on this year of Transit. He said that they do check for Nox as part of the test. If it was an older gas analyser machine then there is still a good chance it would pass. If it's one of the new machines (like in a main dealer) then it probably wouldn't.

Mine will need an MOT at the end of July...so we'll see. If I have to un-blank it for the MOT then that's what I'll have to do...but I know the exhaust emissions are visibly higher with the EGR working and it doesn't run as smoothly.

Putting a plug in the end of the vacuum pipe is a sensible idea (and very easy to do and reverse) but I thought by fitting a plate it would mean that the valve would still be moving regularly and therefore not seize up, just in case it ever had to be brought back into use.

Either way...I think we all agree that they run much better on clean air...who'd a thunk :lol:
Wisdom comes with age...but sometimes age comes alone :shock:

2006 Mk6 T330 135bhp 2.4TDCI
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