6 replies to this topic

[Jwatts93]

Hello, I have a clutch problem and don't know enough about cars to know where to look exactly. I have been given a clutch error list of all the things to check but I don't know what all these parts are or where and what to look for.
Basically my clutch biteing point is on the floor so it only disengages when it's fully too the floor and sometimes not . I also is really hard to get into first and reverse and normally crunches it doesn't normally crunch in other gears but does sometimes if not changed at the right time.
So far I have only changed the slave cylinder and have given it a quick bleed, I am going to try and give it a long bleed tomorrow and see if that helps but I don't know where to go from here.

[Spitz]

After a long bleed....check the position of the stop bolt on the bell housing to the clutch arm. You may need to loosen the locknut and turn the bolt out a little.

Also...with someone flooring the clutch...check that there is several thou. between the big nut on the end of the bellhousing and the bellhousing itself..

[Jwatts93]

I believe this was the first thing I did and it didn't make much difference :/

[Cooperman]

Clutch fault-finder follows:

CLUTCH DRAG

Clutch drag or failure to disengage is not an uncommon problem with the Mini.
There are several possible causes as follows:
A. HYDRAULIC SYSTEM
1. Wear in the pedal spindle or failure of the pedal to master cylinder clevis pin.
2. Failure of seals in the clutch master cylinder.
3. ‘Ballooning’ of flexible hose due to internal hose degradation or damage
4. Air in system due to inadequate bleeding
5. Failure of slave cylinder seals

B. MECHANICAL SYSTEM – WITHDRAWAL MECHANISM
1. Wear in top clevis pin
2. Wear in lower clevis pin
3. Bent arm
4. Worn or broken ball at lower end of arm where it engages into plunger.
5. Wear in plunger ball seat.
6. Incorrect setting of overthrow stop nuts
7. Incorrect setting of adjusting screw (pre-Verto)
8. Corrosion between plunger and clutch cover due to lack of lubrication.
9. Thrust bearing failure – accompanied by a lot of noise.

C. THE CLUTCH ASSEMBLY
1. Failure of clutch diaphragm spring due to fatigue or distortion
2. Centre plate hub not sliding on primary gear splines.
3. Clutch plate surface de-laminating or breaking up
4. Distorted clutch plate.
5. If fitted, clutch plate shock springs broken and causing a ‘jam’.
6. Primary gear not rotating freely on crankshaft due to either i) Insufficient primary gear end float, ii) Primary gear bushes seizing on crankshaft, or iii) Primary gear bushes breaking up

[jmmini]

Leaky slave cylinder?

Have a good read of coopermans post, that covers everything.

[Cooperman]

We get so many questions about clutch drag that maybe my fault-finder should be made a 'sticky' if it would help.

[Jwatts93]

I have seen this I am just unsure on some of the things what and where they are etc... And don't know where to start or what to look for. I have already changed the slave cylinder so should I move on to the master cylinder next and look at that and maybe replace that ?