sticking clutch
sticking clutch
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Discussion

James MK

Original Poster:

556 posts

280 months

Friday 15th June 2007
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Almost ready for supercar sunday.......but for one concern. The clutch pedal has a habit of sticking down. Been doing it on and off for year and is always ok when it's in for a service. Tends only to happen in stop start traffic. Has anyone else had this? Is there an easy cure?

adam quantrill

11,679 posts

271 months

Friday 15th June 2007
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Is this still a cable operated clutch?

ed_crouch

1,169 posts

271 months

Saturday 16th June 2007
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If so, ditch it and fit a concentric clave cylinder system. Problem solved, downstream problem of it snapping again in 5 years time solved, possible alleviation of an annoying squeak solved, and some techno blingery too.

Monster monster.

Ed.

James MK

Original Poster:

556 posts

280 months

Saturday 16th June 2007
quotequote all
Nah, the cable went years ago. After being stranded in the yorkshire moors (beyond network coverage so couldn't call for help), at the dead of night on the A40, then oncce just trying to get out of the garage I dispensed with the cable!

No, this is a hydraulic system, which has been otherwise been a great improvement. Just occasionally it sticks, problem comes and goes. Tends to be only when I'm pulling away, because the pedal stays down for longer. May even be a problem with the pedal stop, maybe it just goes too far down?

Danny Hoffman

1,617 posts

291 months

Sunday 17th June 2007
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Hi James,

Is there a rubber hose in the hydraulic set-up? If so this may be breaking down internally prevennting the fluid returning. You mentioned it seems to get worse in traffic, so maybe the heat build up is making it worse.

If there is no hose in the setup it may be worth changing the seals in the cylinders, as this is the easiest thing to do. Otherwise I would suspect that there is something more serious going on internally - which would mean and engine out job.

Danny

James MK

Original Poster:

556 posts

280 months

Monday 18th June 2007
quotequote all
Danny Hoffman said:
Hi James,

Is there a rubber hose in the hydraulic set-up? If so this may be breaking down internally prevennting the fluid returning. You mentioned it seems to get worse in traffic, so maybe the heat build up is making it worse.

If there is no hose in the setup it may be worth changing the seals in the cylinders, as this is the easiest thing to do. Otherwise I would suspect that there is something more serious going on internally - which would mean and engine out job.

Danny
Hi Dan
I would hope that it isn't that serious as all the parts are fairly new. It's been intermittent for some time (even on the old clutch), but always behaves ok when the car's in for a service so there's nothing to look at. Anyway, first priority now is getting a new expansion tank for the rad before I go to goodwood on sunday!
J

adam quantrill

11,679 posts

271 months

Monday 18th June 2007
quotequote all
Given that it's hydraulic:

a) check that the master cylinder is nicely perpendicular to the bulkhead.
If not, the piston will wear the bore unevenly and can stick.
b) check the operation of the connecting rod from the pedal to the cylinder, make sure it stays as parallel as possible to the centre line - same reasons really.

What are the exact symptoms - does the pedal stay depressed? Does it come back up but only slowly?

Danny Hoffman

1,617 posts

291 months

Monday 18th June 2007
quotequote all
If you has the same issue on the old clutch then at least it must be something external of the engine/box which is good news. As you have a rather non standard set-up it may well be something to do with the mounting of the master cylinder/routing of the pipe/hose as Adam suggests

James MK

Original Poster:

556 posts

280 months

Monday 18th June 2007
quotequote all
Thanks guys. I think this is sonething to do with the set-up being non-standard. May even need to look again at the pedal stop.

J