Hey all, looking for some help in diagnosing my clutch problem so i don't end up ordering and changing parts i dont need to.

Symptoms: 1. Clutch permanently engaged (can move freely between gears when engine is running)
2. Clutch arm looks to be enraged as per symptom 1
2. Pedal is rock hard

So, i am thinking slave cylinder???

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I'm guaranteed to break something every time, but there's nothing like getting under the bonnet and having a go!

Just let out some pressure from the bleed nipple on the slave cylinder. No dice, still jammed

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I'm guaranteed to break something every time, but there's nothing like getting under the bonnet and having a go!

When you say the pedal is rock hard, do you mean you can't move it at all?

If you pull back the rubber boot on the slave cylinder, how far away is the plunger from the end of the bore? There is a circlip that prevents the plunger from pushing all the way out. Does it move when the pedal is pushed? If it's up against the circlip, you'll need to get a longer pushrod or put a spacer in there.

If there's a gap but the pedal doesn't move, I'd suspect the rubber hose. They can expand in the middle and restrict fluid flow.

Hose.

Hose??
Well it looked like the original one. Would that explain both symptoms?




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I'm guaranteed to break something every time, but there's nothing like getting under the bonnet and having a go!

Hose??
Well it looked like the original one. Would that explain both symptoms?




Sent from my Lumia 800 using Tapatalk

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I'm guaranteed to break something every time, but there's nothing like getting under the bonnet and having a go!

The hose swells shut with age and then acts as a check valve. If it ain't been replaced in living memory, I'd fit a new one, they are cheap.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Hey guys.

Just my thoughts on this problem.

Im thinking maybe the clutch fork had pushed out of the hole in the release bearing holder. If it was a hose the pedal would be spongy as the hose would swell under pressure.

Just pull the clutch cover of and check if the clutch fork snd release bearing move freely.

Rodney

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The best part of fixing your mini is the test drive

Minis..

1976 van daily drive
1975 van
1968 deluxe in the shed
1967 deluxe high strung 1310
1959 austin healey sprite

Sounds like you might be on the right track. When I said the pedal was rock hard that's exactly what I meant. It has no give at all and just doesn't feel like a blocked hose which would have a slight spongey feel. Can you pleas clarify 'clutch fork' is it the push rod out of the slave or the push rod into the master cylinder?



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I'm guaranteed to break something every time, but there's nothing like getting under the bonnet and having a go!

No, the inner layer of the hose swells shut and the outer layers are still fine.
I have dissected a hose after it has done it.

Thanks DrMini, I am not quite sold that it is the hose but while I am mucking around down there I might as well replace it. Its tight in there, any tricks you could advise for this job?





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I'm guaranteed to break something every time, but there's nothing like getting under the bonnet and having a go!

My Cooper S had a rock hard pedal when it did it.
Think about it, the clutch is already down, the fluid won't return and the pedal comes up for a second bite, where is the next lot of fluid going to go?

Sorry I meant the plunger on the clutch housing. The clutch lever pivots on the clutch housing on has a ball on the end that locates in the plunger.

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The best part of fixing your mini is the test drive

Minis..

1976 van daily drive
1975 van
1968 deluxe in the shed
1967 deluxe high strung 1310
1959 austin healey sprite

check that the stop nuts on the bearing carrier are not touching the clutch cover
eg , stopping the carrier from going in

Mark

Rock hard pedal generally hose. Replace that, easily done then if its not fixed look at other options.

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1965 Riley Elf
1974 Ex Army Moke
1997 Rover Cooper
2002 JCW Cooper
2003 JCW Cooper S