7 replies to this topic

[MMM1965]

Hello, I was wondering if anyone could give some advice on a problem im having with the clutch on my mini? A few weeks ago i adjusted the clutch due to it slipping a bit, cured the slipping but ever since i need to pump the pedal a couple of times to disengage the clutch properly. I have tried everything, changed the slave cylinder, bled it at least 10 times, adjusted the throwout nuts etc. properly, checked all linkages for excessive play but the problem persists. Does anyone have any ideas because it's driving me mad now? Thanks

[KernowCooper]

If pumping the pedal enables you to disengauge the clutch it points towards air in the system still, have you had a look under the dash and checked the bottom of the clutch master cylinder? have you set the clearance on the clutch arm correctly, if you have to big a gap here it will reduce the overhaul pedal travel.

[MMM1965]

Thanks for your help dave, you gave me some advice on same problem a few weeks ago, still ongoing! I have looked at the master cylinder from underneath can't see any leaks, clutch arm gap set correctly, I have bled litres of fluid through it using the traditional method and still it is as simple as the piston pushes out further on the second press of the pedal than the first! Can you give any advice on bleeding? And do you think that it may be worth trying a new master cylinder? Keep hearing scary stories about how hard it is to change though!

Jeremy

[cal844]

its an easy change, the hard part is getting the pin out the link from the pedal!

[MMM1965]

Well, i've been working on the clutch problem all day and the damn thing now seems worse than ever. Ive got to pump the pedal a few times to get any pressure at all. Have bled it a few more times, used a Gunsons eazybleed and not a bubble has come out. Am starting to lose the will now, could it be the master cylinder even though nothing is leaking from anywhere?

 

Jeremy

[Cooperman]

Get someone to help you and push the clutch pedal once all the way to the floor and whilst doing this measure the lateral movement of the top of the clutch arm. It MUST move a minimum of 0.5". If less than that there is a problem with the hydraulic system, assuming the stops are set correctly and the clevis pins are not excessively worn. Your symptoms point to either slave or master cylinder.

The clutch on the Mini is quite critical in terms of settings and movement.

[Minihaha]

Hi, it sounds like the hydraulic oil is leaking past the internal seal, which you are only pushing a small volume of oil, when this happens there won't be air bubbles because it is enclosed from atmosphere, I am not sure if you can change the slave cyl. seal !

[MMM1965]

Thanks for all the advice guys, really appreciated. I give up now, first pump of pedal not a lot of movement of slave cylinder then gradually builds until full movement is achieved on fifth or sixth pump, although the linear movement of top of clutch arm at that point is a hell of a lot more than 1/2 inch more like 1 1/2 inch. As I mentioned previously I have fitted new genuine slave and hose, just don't know what to do now. Do you think it is the master cylinder even though there are no signs of leaking, trouble is they are rather pricey and I have heard that repair kits are not that effective.

Jeremy