Omega Owners Forum
Chat Area => General Car Chat => Topic started by: TheBoy on 05 February 2015, 20:29:27
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Anyone know about Mini clutches? The pedal doesn't fully return up when released.
Tried bleeding (but not reverse bleeding yet), no air came out, no difference.
Disconnect the slave from the release arm, there is a fair amount of play in the arm:
(http://i14.photobucket.com/albums/a319/IamTheBoy/Omega%20Odds/43EFE7C2-80B9-47FF-B257-09EB512044D9_zpsivsectyp.jpg)
(http://i14.photobucket.com/albums/a319/IamTheBoy/Omega%20Odds/3FDE7675-6AEC-4E80-9B8E-579C2D4E6570_zpsa0vd8jye.jpg)
Don't know whats normal :-[
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That would be the shite bmw mini then ;D
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looks like a 'proper' A-series to me?
I can't see the point of reverse bleeding it as it's a simple system and a short hose.
I'd be removing the cover and having a look at the bearing and the rest of the mechanism. At least Mini clutches are light work.
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Thought proper mini's were cable like the metro ;D
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Only later A-series Metros were cable; early ones used the same hydraulics as Minis, 1100s and Allegros.
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Where the operating rod goes through the aluminium cover is prone to corrosion and seizure,I'd be oiling that bit up then work the pedal to free it up
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As per other comments... Could be corrosion related.
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Where the operating rod goes through the aluminium cover is prone to corrosion and seizure,I'd be oiling that bit up then work the pedal to free it up
Agreed - and try reverse bleeding as well ;)
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From memory,,,the clutch cover when new were notorious for being faulty ??????
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From memory,,,the clutch cover when new were notorious for being faulty ??????
I vividly remember the bang as the pivot point snapped off the clutch cover on my Allegro..
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Where the operating rod goes through the aluminium cover is prone to corrosion and seizure,I'd be oiling that bit up then work the pedal to free it up
the rod into the clutch, as that's pretty free to be honest. That amount of "play" shown in picture I could do with my little finger.
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That would be the shite bmw mini then ;D
Sorry, I wouldn't have even graced it with my presence had it been one of those shitboxes.
This is a real Mini :y
It was restored to a good standard by the owner's dad a couple of years back, although the owner did learn to drive in it. However, she learnt well, and wasn't too harsh on it.
I took it for a blat yesterday, the clutch works very well, its just the pedal only returns up a bit (enough to prevent any slipping, and I could lose front end traction from 1st to 2nd by being rough with it - so believe the clutch isn't shagged per se).
Up til a month or so ago, it used to return all the way up, level with brake pedal.
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Where the operating rod goes through the aluminium cover is prone to corrosion and seizure,I'd be oiling that bit up then work the pedal to free it up
the rod into the clutch, as that's pretty free to be honest. That amount of "play" shown in picture I could do with my little finger.
I don't mean the arm attached to the cylinder,I'm talking about the bit with the two nuts on :y
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There should be a return spring, that hooks into a little metalclip on the clevis and back along the slave cylinder. I think there might also be one on the pedal, but can't be certain.
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Yeah, that picture looks like it's missing parts 15, 17 & 18 from this list, to me: http://www.rimmerbros.co.uk/Item--i-GRID000968
(The larger picture makes it much clearer where they should go)
Come to think of it the picture looks like it's missing the clevis pin that links the clutch lever to the slave cylinder?
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Yeah, that picture looks like it's missing parts 15, 17 & 18 from this list, to me: http://www.rimmerbros.co.uk/Item--i-GRID000968
(The larger picture makes it much clearer where they should go)
Come to think of it the picture looks like it's missing the clevis pin that links the clutch lever to the slave cylinder?
That's cause he took it out, you muppet ;D
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Fair point.. safe to assume he also removed the return spring assembly, I suppose.
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Fair point.. safe to assume he also removed the return spring assembly, I suppose.
Probably, but you never know these days... ;D ;D
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Thats got a much later version of clutch than the Mini I used to
maintain weld daily.
If it was restored in the past, do you know if the clutch pedal ever did return to the top properly? There are various sizes of master and slave cylinder over the years.....could wrong mix of bits have been used?
The big nut and lock nut on the end of the clutch cover was for adjusting the 'clutch throwout', or more accurately, to compensate for the variations in machining that crept in between Monday and Friday. That adjustment has to be right for the clutch to behave properly.....but I cant remember what you set it to.
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Is the clutch pedal return spring ok?
Hydraulic hose ok and not collapsing?
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I know its a "Verto" clutch.
Should there be springs on pedal and one the actual clutch end?
I think there is some kind of spring in the slave cylinder, as it has a natural tendency to push the piston out.
TIA.
Off to have another look in daylight in a minute.
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Trying to stir the brain cells to remember what was particularly 'odd' about the mini clutch :-\
Something about the clutch being the 'wrong' side of the flywheel because of the drive gear down to the gearbox ? :-\
IIRC the flywheel needs to be pulled off a very tight taper on the and of the crankshaft to get to the clutch. Also there is a thrust bearing (on the crankshaft?) that is prone to failure which screws up the clutch free play when it fails? :-\
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OK
The thrust bearing isn't the Achilles heel I was thinking of (that was on the Triumph Herald & Spitfire engine).
In the mini the clutch release arm has a ball end that engages with a hole in the release plunger. Over time the ball and hole in the release plunger wear leaving too much slack for the slave cylinder to take up.
(http://www.minispares.com/image.axd?type=product&picture=350/DAM5355.jpg)
Clutch lever arm short verto (http://www.minispares.com/product/Classic/DAM5355.aspx)
(http://www.minispares.com/image.axd?type=product&picture=350/DAM5353.jpg)
Clutch plunger verto (http://www.minispares.com/product/Classic/Clutch/Fittings/DAM5353.aspx?0601&ReturnUrl=/search/classic/plunger.aspx|Back%20to%20search)
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OK
The thrust bearing isn't the Achilles heel I was thinking of (that was on the Triumph Herald & Spitfire engine).
In the mini the clutch release arm has a ball end that engages with a hole in the release plunger. Over time the ball and hole in the release plunger wear leaving too much slack for the slave cylinder to take up.
(http://www.minispares.com/image.axd?type=product&picture=350/DAM5355.jpg)
Clutch lever arm short verto (http://www.minispares.com/product/Classic/DAM5355.aspx)
(http://www.minispares.com/image.axd?type=product&picture=350/DAM5353.jpg)
Clutch plunger verto (http://www.minispares.com/product/Classic/Clutch/Fittings/DAM5353.aspx?0601&ReturnUrl=/search/classic/plunger.aspx|Back%20to%20search)
Thanks Andy H, my googling had returned similar things about wear on those components :y. Although these have been relatively recently replaced on this car when it was restored :)
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Thanks all, really appreciate the help :y
Went over there today, in daylight, job jobbed :y
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And the fix was?
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And the fix was?
He's not telling, nor about his MOT failure. He likes playing hard to get. Pretend you don't care, then he'll cry. ;D
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And the fix was?
Ah, yes, good point well presented. Excuse me, I've been nursing a bad headache, following last night's escapades in town :-[
Pinpointed fault to pedal, so freed all that up, cleaned and regreased, sorted. Broke the brake switch in the process, 'dangle berries'.
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nor about his MOT failure.
Too frekking right. I wouldn't have mentioned the air freshener thing a few years ago, but Marks "big gob" DTM had already done it before I got home ;D
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nor about his MOT failure.
Too frekking right. I wouldn't have mentioned the air freshener thing a few years ago, but Marks "big gob" DTM had already done it before I got home ;D
I see. You mean that handsome Mark fella who likes to share with his good friends on the forum? ;D
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And the fix was?
Ah, yes, good point well presented. Excuse me, I've been nursing a bad headache, following last night's escapades in town :-[
Pinpointed fault to pedal, so freed all that up, cleaned and regreased, sorted. Broke the brake switch in the process, 'dangle berries'.
Success! Fail! Oh dear.. Still, one fault fixed, eh?