Re: alfa-digest V8 #991

[George Graves <gmgraves@domain.elided>]

I wasn't watching my mechanic when he did it, but obviously, on my car, 
the balancing nuts either came off, or were scrambled the last time 
somebody had the assembly apart. I was in the car, up on his lift, when 
he did it, but it was obviously trial and error. He would have me start 
the car and blip the throttle several times, then he would tell me to 
turn it off. Then he would fiddle under there for  a few seconds and ask 
me to restart. It must not be all that difficult, because balancing my 
shaft took less than 15 minutes all-told.

George Graves
Owner of a (for the first time) SSSSSMMMMMOOOOOTTTTHHHH GTV-6



On Monday, August 5, 2002, at 09:30 AM, alfa-digest wrote:


> Date: Mon, 05 Aug 2002 00:51:04 -0700
> From: Jon Pike <jhpike@domain.elided>
> Subject: RE: Driveshaft Balance
>
> > Technical bulletin 89.01. dated May 1, 1989
> >
> > "During assembly of the GTV-6 and Milano models of Alfa Romeo, the
> > factory precision balances the driveshaft on the car.  The balance of
> > the driveshaft is adjusted by using different thickness nuts and/or two
> > nuts on one bolt.  (See Fig. 1)"
> >
> > "All hardware and driveshaft components MUST be refitted exactly as the
> > factory assembled them."
> >
> > "Whenever removing or disconnecting the driveshaft from the vehicle 
> > mark
> > the position of ALL mounting hardware and driveshaft components so that
> > they can be returned to their original position to preserve driveshaft
> > balance."
> >
> > So there it is - all you have to do is look!
> >
> > I've forwarded copies of the TSB to John off-line.  If others are
> > interested, lemme know, however it's pretty much the text I copied plus
> > a pic of the drive shaft and hardware, nothing special.
> >
> > bs
> Now the REAL question would be..  what's the balancing procedure?
>
> I'm wondering if there might be a not too special equipment way to do
> this,  like use a timing or strobe
> light to freeze it and "see" how it vibrates,  and know where to add
> some weight..
>
> Jon
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