other clutch issues

[DavidL]

I won't hijack Oliver's thread I'll start afresh.

I changed my slave last year and all was well.
Recently I noticed that once a journey, usually when manoevering, the pedal would saty down. Otherwise it seemed fine.
Since I didn't do the master and pipe I thought this needs doing.
Anyway I couldn't see any fluid on the pedal and there is no fluid loss from the reservoir. So I bled it again and the same still happens.

Its odd as the pedal is really bouncy again after I've bled it but it will still stay down occasionally.

I'm assuming I should change the master and pipe anyway but might there be another reason? Some sort of return spring or something?

 

[Mike_Pollock]

Springy feel and staying down both say air in the system -somewhere!

Try bleeding it with the car on a hill, the slave doesnt bleed easily.

 

[DavidL]

Its odd as when I changed the slave and bled it it was absolutely fine for about a year and only now is it causing problems.
I think I'll just get it all changed!

 

[mike220]

Can you get the pedal to drop and stay down if depress it very slowly ? If so check the flexi hose very carefully - these can go porous at the age they are now. That's the issue with mine, all I have to do now is find the right adapter to get the goodridge line I have fitted.

Mike

 

[chrisg]

David

From the symptoms you're describing it does sound like the clutch master cylinder. Apparently they don't always leak externally (eg all over the carpet) but the internal seal won't hold pressure and the fluid just goes past.

If you look at the location of the Master Cylinder (very close to the exhaust) both the cylinder and the associated flexi rubber hose undergo a lot of heat exposure, your problem could be heat related ?

Chris

 

[DavidL]

Chris,
Since there are only 3 pieces to the hydraulic side of the clutch and I've done one, and I'm not planning on selling anytime soon, it makes sense to do the others anyway.

I'll take the hose if Oli doesn't want it - at least I know it will fit!

 

[DivineE]

I'm with chrisg on this.

 

[DavidL]

Do people usually change the hard pipe too? That must be past its best. It could just be a piece of brake pipe mind which would be easy to fabricate.

David

 

[Mike_Pollock]

I think you could make up the hard pipe , but I think it unnecessary unless.its been damaged or for cosmeti reasons.
It either works or leaks, whereas the flex can distort under pressure.

 

[DivineE]

ORIGINAL: A9XXC

I think you could make up the hard pipe , but I think it unnecessary unless.its been damaged or for cosmeti reasons.
It either works or leaks, whereas the flex can distort under pressure.

Wouldn't vibration, movement of the engine fracture the pipe over time if it was all hard pipe? Master cylinder is fixed to bulkhead, slave onto the engine.

 

[Mike_Pollock]

Thats why it has the flexy bit!

Also as I said if the hard pipe isn't leaking its ok, I've seen flexy hose look ok but swell under pressure.

 

[DivineE]

ahh re-read your post and the post you were replying to, I get it now. Sorry I thought you were suggesting replacing the flexi pipe with hard pipe[8|]

 

[sulzeruk]

Change the flexi, get a Goodridge one or similar as the OEM rubber one is rather expensive.
Alasdair

 

[DavidL]

Thanks everyone. Goodrich hose coming from Chris and new master cylinder from Bert to be ordered tomorrow.
No time to do it so as local indie has quoted 2 hours they can do it.