My 2015 octavia 3 this morning clutch was to the floor with no hydraulic in the reserve been told it the the clutch slave cylinder which is the internal one.is it worth replace the clutch at the same time even its only done 30k

9 hours ago, jimbob6512 said:

My 2015 octavia 3 this morning clutch was to the floor with no hydraulic in the reserve been told it the the clutch slave cylinder which is the internal one.is it worth replace the clutch at the same time even its only done 30k

I would as the clutch fluid my of come into contact with the clutch.

The basic clutch parts are cheap and much of the labour needed would be done when the gearbox is removed to change the slave cylinder - so yes as it's very little labour cost it's worth doing whilst you're at it. The clutch plate might be contaminated with brake/clutch hydraulic fluid as well. Probably not worth changing Dual Mass Flywheel at that mileage though.

 

Can I presume the clutch master cylinder has been checked? If the concentric slave cylinder is leaking badly there should be some evidence of dripping clutch fluid from the bottom of the gearbox bellhousing. 

 

Which engine is fitted to the car? Not all manual versions are fitted with a concentric slave - small cc petrol versions have an external slave.

Edited 8 July, 20232 yr by bigjohn

11 hours ago, jimbob6512 said:

My 2015 octavia 3 this morning clutch was to the floor with no hydraulic in the reserve

 

Is it the garage telling you that or what you saw yourself with your own eyes?

 

I am making 2 assumptions, please advise if they are wrong:

 

1. That you meant to say "no hydraulic fluid in the reservoir

 

2. Your vehicle has the combined brake and clucth fluid reservoir.

 

If so then you have a serious loss of fluid in the braking system and should not drive the vehicle, the pipe that feeds the clutch master cylinder is half way up the combined reservoir to prevent a clutch leakage as you report from compromising the braking system, therefore the reservoir should be (approx) half full if the leak was from the clutch hydraulics.

 

Did you not see a low hydraulic fluid warning light?

1 hour ago, J.R. said:

 

Is it the garage telling you that or what you saw yourself with your own eyes?

 

I am making 2 assumptions, please advise if they are wrong:

 

1. That you meant to say "no hydraulic fluid in the reservoir

 

2. Your vehicle has the combined brake and clucth fluid reservoir.

 

If so then you have a serious loss of fluid in the braking system and should not drive the vehicle, the pipe that feeds the clutch master cylinder is half way up the combined reservoir to prevent a clutch leakage as you report from compromising the braking system, therefore the reservoir should be (approx) half full if the leak was from the clutch hydraulics.

 

Did you not see a low hydraulic fluid warning light?

The hydraulic fluid is a combination brake and clutch it was OK to drive the day before no warning light .the fluid was half full I've taken the cover off from under the engine to look for leaks and there hydraulic fluid there 

So half full not no "hydraulic in the reserve" it did what it was supposed to do and maintained the level for the braking system hence no warning light.

 

The diagnosis of a slave cylinder leak is the most plausible but there is also a flexible hose and a plastic bleed block/peak torque limiter both with O ring seals that could also be the cause and a much easier cheaper repair, if the fluid is on the bellhousing then its one of the external components, if its dripping out of the join between bellhousing and engine then its the internal concentric slave cylinder.

 

You have not confirmed what engine and gearbox combination your car has, it could be an external slave cylinder.

On 08/07/2023 at 08:57, bigjohn said:

The basic clutch parts are cheap and much of the labour needed would be done when the gearbox is removed to change the slave cylinder - so yes as it's very little labour cost it's worth doing whilst you're at it. The clutch plate might be contaminated with brake/clutch hydraulic fluid as well. Probably not worth changing Dual Mass Flywheel at that mileage though.

 

Can I presume the clutch master cylinder has been checked? If the concentric slave cylinder is leaking badly there should be some evidence of dripping clutch fluid from the bottom of the gearbox bellhousing. 

 

Which engine is fitted to the car? Not all manual versions are fitted with a concentric slave - small cc petrol versions have an external slave.

2.0 tdi engine manual 

6 hours ago, jimbob6512 said:

2.0 tdi engine manual 

 

Yup, concentric then

Thanks bigjohn 

Thank you to everyone who gave advice. Had full clutch and clutch slave cylinder done 600 quid lighter but sorted 👍