Wobbly Flywheel + Clutch!
Turbo Mini Forums

Been in contact with MED today because the RTS assembly I sent them (built by me) has a 50thou run out on the rear face of the flywheel. I asked them to take the flywheel off and check the pressure plate and that has a 32thou run out.

What could be the cause of this? damaged/bent clutch plate? wonky hub? They checked all of the bolts are tight, and all parts came out of running cars?



A link to a video:
http://vid1197.photobucket.com/albums/aa42...zps0b3eda0c.mp4

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0

Burr or swarf between the verto hub and stamped steel plate?

not sure maby some crud in the taper?

i checked mine when in the block (same time as thrust clearance) and it had a tinny bit like a few tho this also measured on the clutch friction surface
at the time i was a bit worried it may cause shudder but it seems its not an issue although im not sure how this affects the balance? all be it supposedly dynamically balanced...

Edited by Turbo This.. on 4th Sep, 2014.

possibly previous owner lapped the flywheel on but forgot to remove the paste?

Could it be the electroplating on the hub has built up unevenly?

I'm fairly sure it was assembled clean but I'll ask them to take it apart and look for Swartz etc.

I'm assuming it can't be anything to do with the RTS modifications as both the pressure plate surface and flywheel have a large run out? If it was the springs I think it would be just the pressure plate.

Problem I have now is that I'm an hour and a half from the parts. I was going to ask MED to swap parts over until it runs true?

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0

Dazed and Confused....

Did you remove the centre boss from the main steel plate whilst doing the work ?

(I did because it made drillng the rivets out of the plate easier)

If so, all the original factory bolts I've seen have been centre punched on their end to act as additonal locking so could have raised a burr on the steel plate, mating side, as they came back through it.

Also, did you notice the centre boss "should" only go back in one position - the six holes are not equally spaced but the difference in spacing is very small. If the clearance in the bolt holes was large (or someone in the past had enlarged them because they didn't realise it only goes one way) it "might" be possible to assemble it wrong. (on mine the bolt hole clearances were very tight so it would not have been possible).

Schrödinger's cat - so which one am I ???

Dazed and Confused....

Thanks Rod, I did remove the hub from the plate whilst doing the work, I didn't notice any centre punch marks on the bolts but then I don't think I really looked. That could be a possibility.

I did find that the holes only lined up one way, and all the bolts spun in freely iirc.

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0

Schrödinger's cat - so which one am I ???

Try a different boss ?

Or check the boss itself for runout.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Thanks for all the help, I've just spoken to MED and they're going to try all the suggestions. I'll update this with anything they find.

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0

Sounds expensive

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0

I mean med doing all this trial and error stuff, won't they be putting the price up

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

Ah I see, at the moment they have been very helpful and reasonable, but if they can't find anything obvious I'll have to pick it all up.

http://www.turbominis.co.uk/forums/index.p...tid=469104&fr=0