28 replies to this topic

[mini13]

Ok, looks like you've ruled out the main things like the longer bolts, also I assume this is a new plate so thickness is ok. ( but that would be slip rather than the non engagement you describe)

 

can you put a pic up of the release bearing, theres two types verto and non verto.

also theres different plungers.

 

when you bolt the wok on, is there slack/play on the plunger? I suspect theres an issue in that area, 

[Earwax]

More of a question than a response,,,,, if the flywheel creeps up the crank taper a little  ( over time not necessarily a problem at all), it could bring into play hangup of longer bolts etc   but  also maybe the internal bits of the wok /plunger area..... my thought is , it works fine when off the crank but maybe some blue tack around some of the innards of the wok could reveal more....???

[danie garry]

hi all, 

 

nothing strange on the flywheel that I can see, it's not perfect but definitely not going to cause the issue I have, the short bolts are protruding approx 2mm out the face of the flywheel (they are clear of any other part so again, shouldn't cause an issue?) cant feel the lines with my nail so it's more than up to the task

hydraulic lines are all clear and not kinked

the weird thing is that it worked and then stopped(twice!), is there a possibility the diaphragm is kaput(its a new borg & beck kit from minispares) could the diaphragm spring bend too far and come away from the flywheel? surely I'd hear that return if it did

i tried to push the diaphragm as far as i could(within reason) using the puller to see if there is anything happening if the but it returns without an issue

if i put this all back together it is likely to work without an issue but for how long!?

 

 

 

I assume the marks on the clutch plate are just bedding in mark? the high points getting leveled off?

 

[sonscar]

I would clean the splines and try the plate to check its movement.I would not use any lube here,Steve..

[mad4classics]

The pre verto clutch usually has good pedal feedback so you can sense the bite point as you depress the pedal with the increase in force, especially with the stronger spring clutch diagphrams.

On the occasions this has happened did the pedal travel / feel change?

Had a fault on the modern last year where the clutch slave was rusted and stuck at the end of it's travel - so suddenly no clutch; BUT only when the engine / slave cylinder was hot!

Not relevant to your problem, as you've replaced everything according to your first post, and I'm sure you'd notice the arm at a funny angle and / or the overthrow nut snug against the wok if that happened. Thought it worth a mention though as it might trigger a fresh idea.

Edited by mad4classics, 20 June 2022 - 04:51 PM.

[Earwax]

Are those cracks on the inside of the wok???

[danie garry]

I ran the clutch plate up and down the primary gear just to make sure nothing was getting caught up there too, no problems

The cracks on the inside of the Wok are just some crazing, it's perfectly intact! Had me worried the first time I saw it too!

Would heat engine/exhaust heat be enough to expand brake fluid to the point that it'd push the slave? Fairly sure its not the issue as the arm is back on the 7/16th bolt when the clutch stops working so it's got to be the diaphragm/flywheel/pressure plate/clutch plate getting hung up on something

[mini13]

I'd stick an extra washer on the drive strap bolts to bring them back to flush, just to be sure they wont contact when the clutch wears a bit.

 

also check the pressure plate for signs of the bolts touching, maybe double check with some bluetack.

Edited by mini13, 21 June 2022 - 11:10 AM.

[mini13]

hmmm,

 

i cant see any sign of the friction plate having scuffed against the flywheel, it coulf be its not run long enough, but.... just as a double check.... stick the engine in gear and check the primary gear dosent rotate....

[imack]

Is the loss of drive definitely a clutch issue?
Drive shafts located properly in the gearbox?
Pinion nut come undone on mainshaft?

[danie garry]

I'm 99.9% sure it's a clutch issue, I can put it in gear and turn the primary gear and get the wheels turning, I've also had it drive through all the gears and then loose drive so surely the gearbox and shafts are all OK?
I've been caught out on that 0.1% before though!

I'll put it back together and see if it drives again, if I loose drive I'll pull the starter and try to see if the clutch is clamped into place or spinning freely

[mad4classics]

Wouldn't be the first time a drive shaft has popped out ...

https://www.theminif...d/#entry3721090

IF you're re-assembling to try again AND it happens again - take carefull note of everything; don't just assume something mechanical in the clutch and strip it all down again.

[danie garry]

Just reassembled the clutch(dab hand at it now!) Into gear and nothing...but I spot the speedo moving
It was that damn 0.1%!! Mad4classics(*edit & imack!) you were 100% right, the rhs shaft hadnt seated in the pot joint!
Blinded by the fact that taking the clutch out and putting it back got the car moving

Sorry for wasting everyone's time! And thanks for all the replies, I'll get the shaft back in tomorrow and hopefully move on with the running in!

Thanks again all

Edited by danie garry, 22 June 2022 - 11:48 AM.

[imack]

At least you've got it sorted!