Suddenly the clutch won't disengage
- Thread starter Cooper99
- Start date
unstable load
Well-Known Member
I'm with Demetris on this. Don't leave it like that. As a last resort, talk to an Engineer about
having it filler-welded and reground, but don't leave it.
having it filler-welded and reground, but don't leave it.
Cooper99
Member
I have found a new flywheel in UK that I probably will buy. It wouldn't feel right to leave the worn one in place. When changing the flywheel, is there any oil seal or similar that should be replaced?
As seen in one of the pictures a few posts above there's lot of oil in the "clutch housing". But, the oil is black/dirty as if it had been there long, and not clean as it should have been if it came from the gearbox. Anyway, today I cleaned it and removed and dismantled the withdrawal unit. The housing unit gasket seems to be okay. So I suppose the oil must got past the sleeve bush or maybe the cross-shaft oil seal, if it has come from the gearbox. There's no other way for the oil to enter, or is there?
As far as I can see there is no wear to the components in the withdrawal unit. The race and sleeve moves fine, but I can feel a small radial play between the sleeve and the bush (when not removed from the race). The sleeve color looks as it has been very hot sometime!?
As seen in one of the pictures a few posts above there's lot of oil in the "clutch housing". But, the oil is black/dirty as if it had been there long, and not clean as it should have been if it came from the gearbox. Anyway, today I cleaned it and removed and dismantled the withdrawal unit. The housing unit gasket seems to be okay. So I suppose the oil must got past the sleeve bush or maybe the cross-shaft oil seal, if it has come from the gearbox. There's no other way for the oil to enter, or is there?
As far as I can see there is no wear to the components in the withdrawal unit. The race and sleeve moves fine, but I can feel a small radial play between the sleeve and the bush (when not removed from the race). The sleeve color looks as it has been very hot sometime!?
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unstable load
Well-Known Member
It could be leaking at the gearbox front seal and picking up the dirt worn off the clutch as it worked.
Seeing as you have it stripped to this level, I'd change all the accessible seals in the area as a matter of routine.
Seeing as you have it stripped to this level, I'd change all the accessible seals in the area as a matter of routine.
Cooper99
Member
colnerov said:
No I haven't yet. Is it the same as the rear crankshaft oil seal?
Is that seal located behind this circlip?unstable load said:
Yes I should replace them all, I just have to find them =)unstable load said:
A question about terminology: In English, is both an "oil seal" and a "bush" used to stop oil to reach the other side? I'm a bit unsure of this since in Swedish "oil seal" is used for that purpose, but the english "bush" is interpreted as to be used for keeping a specified tolerance/play or to take up vibrations. The supplementary question is thereby: is the "bush for withdrawal sleeve" and the "bush in the center of the flywheel" used to prevent oil to pass, or just to keep a specified tolerance/play/gap?
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Demetris
Well-Known Member
Cooper99 said:
There is no seal in there. The clutch release bearing is lubricated by the gearbox oil, so you should have oil within the clutch release housing. In this way there is some oil that passes through the clutch withdrawal sleeve, but nothing important. However, if the gasket between the clutch release housing and the gearbox itself has failed, then you will have a right mess at the bottom of the bellhousing.
Regarding the crankshaft rear seal or engine rear seal, when you will remove the flywheel it will be obvious if it leaks or not. However, as the others have already said, it is a good idea to replace it now that you have everything appart.
colnerov
Well-Known Member
Hi, cooper99, Yes I do mean the rear crankshaft oil seal.
As far as terminology is concerned, yes you are correct. The bush in the centre of the cranksaft
or flywheel is there to support the front of the gearbox first motion shaft. it goes into a blind
hole so it is not required to stop the passage of oil. The bush in the front of the gearbox is
helping to support the clutch release mechanism and only has oil spray or mist behind it as the
oil level is lower down. it will only leak if the clearance is excessive.
Colin
As far as terminology is concerned, yes you are correct. The bush in the centre of the cranksaft
or flywheel is there to support the front of the gearbox first motion shaft. it goes into a blind
hole so it is not required to stop the passage of oil. The bush in the front of the gearbox is
helping to support the clutch release mechanism and only has oil spray or mist behind it as the
oil level is lower down. it will only leak if the clearance is excessive.
Colin
Cooper99
Member
Ah okay, then I understand. When I read "oil seal" before I thought of the "round type" of oil seal, not the gasket =) However, the gasket seemed to be okay when I removed it.Demetris said:
Thanks for the clarification. Now I got the picture of gaskets, seals and bushes and which to renew =)colnerov said:
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Thanks for your help!
Cooper99
Member
I'm about to remove the flywheel; found a NOS at Wins. I'll put the engine in an engine stand this weekend, to remove the sump. So I have to remove the flywheel, before I have the new one to look at (takes some days to ship it to Sweden). Therefore I wonder, do I have to mark the flywheel position to the crank, or is there some kind of notch or similar to prevent to place the new flywheel incorrect?