Lancia Motor Club

Model Technical and Interest => Flaminia => Topic started by: pchflyer on 29 June, 2019, 09:11:12 PM

Title: Clutch Balance
Post by: pchflyer on 29 June, 2019, 09:11:12 PM
I just had the clutch, pressure plate and center dougnut replaced on my Flaminia Convertibile. It cured the original ill of clutch slip, but added another: drivetrain vibration around 2500 rpm engine speed. The good: the vibration decreases to none as the revs increase. My mechanic (knowledgeable) said his balance "guy" says this particular pressure plate/clutch combo can't be balanced-something about the design of the forks? Assuming the doughnut is not the source (reasonable?), me (not knowledgeable) can't believe that this cant be balanced. Pic is of the old parts- replaced with similar.

Title: Re: Clutch Balance
Post by: Jay on 29 June, 2019, 10:44:36 PM
You can balance a Flaminia clutch, Vibration Free did my, they balance the whole assembly of the 3 main parts in the bell/clutch housing, you just need to bolt it on the gearbox and turn the shaft, dis and engage it a couple of times to seat it, then give it to him. It a strange way to balance a clutch, but it works a treat.

However it's very important to keep all the prop-shaft components exactly the same, including the bolts, if not you my have to balance the whole prop-shaft insitu. Also if you got the gearbox out i would recommend replacing the the seal between gearbox and clutch housing as this one reason why the clutch can start slipping. As a small amount of oil seeps past the seal and these clutches can get very hot with a lot of stop start traffic so the oil turns to vapour and gets on the surfaces.

Title: Re: Clutch Balance
Post by: pchflyer on 29 June, 2019, 11:34:38 PM
Thanks Julian,
I think I "got it"- the new parts need to seat before balancing. I'm not sure why my mechanic (generally very knowledgeable) didn't know a specialist that could do it-but I am in the States and some expertise may be lacking. It obviously would have been easier to do this last week when the car was still on the lift. I will investigate further... Good advice about the seal. To my eye, the clutch was worn but not completely, and there were burn marks? on the pressure plate and no *obvious* oil, but I didn't look that closely. (I didn't do the work!)