[V8] squealing serp belt oddity

[Coleman, David]

Alignment double and triple checked.   And every pulley spins freely.

Interesting note on the belt size... I believe I have the right size, as
the first one I got was too big.  I thought that was due to the crank
pulley size difference between 3.6 and 4.2.   Perhaps there's a smaller
one still, the one for the 5-speed?  Does that mean there are three
different belt applications for the V8?

Regarding the above, by the way, I believe the 3.6 crank pulley was used
when Keith swapped the 4.2 motor...







> -----Original Message-----
> From: Ingo Rautenberg [mailto:ingo.rautenberg at gmail.com]
> Sent: Monday, September 24, 2007 2:13 PM
> To: Coleman, David
> Cc: v8 at audifans.com
> Subject: Re: [V8] squealing serp belt oddity
> 
> IMO there is obviously something that either isn't aligned properly
> (doubt it) or one of your accessories is putting a severe drag
> relative to everything else.  A/C clutch going/ compressor seizing?
> 
> 
> PS:  You DO have the correct size belt, right?  There are two sizes -
> I believe the automatic is bigger and the 5-speed is shorter (forget
> why) -- at least on the 5-speed.
> 
> Ingo
> 
> On Sep 24, 2007, at 12:51 PM, Coleman, David wrote:
> 
> > SO - My '91 5-speed with 4.2 has been enduring a squealing
serpentine
> > belt for several months.  In a nutshell:
> >
> > *       It started squealing only at idle, and would go away with
> > higher
> > RPMs
> >
> > *       Broke under load, nursed back home, replaced with new, still
> > squealed
> >
> > *       Replaced the coil spring behind t-belt cover with known good
> > used; squealing stopped for a month or so
> >
> > *       Started squealing again, this time more apparent with higher
> > RPMs; nearly silent at idle.
> >
> > *       Replaced shock absorber / tensioner with factory new;
squeals
> > like a mofo still.
> >
> >
> >
> > The shock tensioner is fully compressed (i.e. can't make the belt
any
> > tighter), yet under load, I can watch from underneath the belt walk
> > back
> > and forth across the lower idler pulley - like the belt is just
still
> > too loose.
> >
> >
> >
> > Does anyone know if any of the pulleys (aside from the harmonic
> > balancer
> > / crank) are different sizes from 3.6 to 4.2?   The 4.2 belt is way
> > too
> > big; the 3.6 belt is the one in question.
> >
> >
> >
> > If no one knows about the pulley sizes, perhaps the Gates number
> > for the
> > next smaller size???
> >
> >
> >
> > Any ideas welcome!
> >
> >
> >
> > -DaveC.  (nice car except it's embarrassing to drive)
> >
> >
> > THE INFORMATION CONTAINED IN THIS MESSAGE AND ANY ATTACHMENT MAY BE
> > PRIVILEGED, CONFIDENTIAL, PROPRIETARY OR OTHERWISE PROTECTED FROM
> > DISCLOSURE. If the reader of this message is not the intended
> > recipient, you are hereby notified that any dissemination,
> > distribution, copying or use of this message and any attachment is
> > strictly prohibited. If you have received this message in error,
> > please notify us immediately by replying to the message and
> > permanently delete it from your computer and destroy any printout
> > thereof.
> > _______________________________________________
> > Audifans V8 mailing list
> > Send posts to: mailto:V8 at audifans.com
> > Manage your list connection: http://www.audifans.com/mailman/
> > listinfo/v8
> > Have an Audi V8 question?  Check the Audifans Knowledgebase!
> > http://www.audifans.com/twiki/bin/view/Audi/V8
> > Have a V8 answer? ... Please help others by adding to the KB ...
> > all contributions welcome!
> >
> > You can help keep the audifans site running by shopping at http://
> > audifans.com/shop/
> >


THE INFORMATION CONTAINED IN THIS MESSAGE AND ANY ATTACHMENT MAY BE PRIVILEGED, CONFIDENTIAL, PROPRIETARY OR OTHERWISE PROTECTED FROM DISCLOSURE. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, copying or use of this message and any attachment is strictly prohibited. If you have received this message in error, please notify us immediately by replying to the message and permanently delete it from your computer and destroy any printout thereof.