[V8] squealing serp belt oddity
Ed Kellock
ekellock at gmail.com
Tue Sep 25 06:42:23 PDT 2007
I was thinking maybe the pulley (harmonic balancer?) is different in size
due to the different running dynamics of an engine mated to a manual vs. one
with an automatic. Just a guess.
> -----Original Message-----
> From: v8-bounces at audifans.com
> [mailto:v8-bounces at audifans.com] On Behalf Of Coleman, David
> Sent: Tuesday, September 25, 2007 7:24 AM
> To: Scott Simmons; urq
> Cc: v8 at audifans.com
> Subject: Re: [V8] squealing serp belt oddity
>
>
> That question was keeping me up last night as well -- but the
> car's under a cover, and I was just too ding dang tired to
> uncover and scour around for an answer.
>
> I'm guessing the different trans requires a different AC or
> alternator mount configuration, moving the pulley closer inward.
>
>
>
>
>
> > -----Original Message-----
> > From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On
> > Behalf Of Scott Simmons
> > Sent: Tuesday, September 25, 2007 2:04 AM
> > To: urq
> > Cc: v8 at audifans.com
> > Subject: Re: [V8] squealing serp belt oddity
> >
> > Why is there a difference between auto and manual? The
> difference of
> > 30mm isn't much.
> >
> >
> >
> > urq wrote:
> >
> > >TFA indicates the following lengths:
> > >
> > > PT Automatic - 2460mm
> > > PT Manual - 2433mm
> > > ABH Automatic - 2480mm
> > >
> > >HTH!
> > >Steve B
> > >San José, CA (USA)
> > >
> > >-----Original Message-----
> > >From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On
> > >Behalf
> > Of
> > >Ron Wainwright
> > >Sent: Monday, September 24, 2007 1:09 PM
> > >To: Coleman, David
> > >Cc: v8 at audifans.com
> > >Subject: Re: [V8] squealing serp belt oddity
> > >
> > >Not sure. They looked the same when I was doing
> > >George's swap. I think I used the 4.2 pully in any
> > >event.
> > >
> > > But find out which pully you have Dave.
> > >& not sure if the 3.6 too 4.2 Auto belts are the
> > >same...but I do know the Manual 3.6 belt is shorter.
> > >
> > > Ron
> > >
> > >--- "Coleman, David" <David.Coleman at blackrock.com>
> > >wrote:
> > >
> > >
> > >
> > >>Is there an easy way to tell the pulleys (3.6, 4.2,
> > >>manual, automatic)
> > >>apart?
> > >>
> > >>I still have a pulley on my old motor; I'll have to
> > >>run out to see if
> > >>it's still torqued down.
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>>-----Original Message-----
> > >>>From: Ron Wainwright [mailto:ron_01056 at yahoo.com]
> > >>>Sent: Monday, September 24, 2007 4:00 PM
> > >>>To: Coleman, David
> > >>>Cc: v8 at audifans.com
> > >>>Subject: Re: [V8] squealing serp belt oddity
> > >>>
> > >>>So if he used the 3.6 pully from you'r old 3.6
> > >>>
> > >>>
> > >>motor
> > >>
> > >>
> > >>>than you need the Manual belt.
> > >>>Conti part#, 6K2433.
> > >>>
> > >>> Ron
> > >>>
> > >>>--- "Coleman, David" <David.Coleman at blackrock.com>
> > >>>wrote:
> > >>>
> > >>>
> > >>>
> > >>>>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)
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