[V8] squealing serp belt oddity

Tue Sep 25 08:26:24 PDT 2007

That's what I assumed, but what difference does 1 inch make?  I 
understand under and overdrive pulleys, but they're usually different by 
a large margin.

*shrug*

~Scott S.

Ingo Rautenberg wrote:

> Dave,
>
> The ONLY difference I can see is that each has a different part No.  
> for the front dampener/pully assembly.  Perhaps Ron can measure the  
> various ones he has to confirm. If I had to guess, the 5 speed likely  
> has the smallest diameter and the 4.2 has the largest diameter.
>
> Ingo
>
> On Sep 25, 2007, at 9:24 AM, Coleman, David wrote:
>
>> 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)
>>>>>>>
>>>>>>>
>>>>>>>>> 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 ...
>>>>>>>
>>>>>>>
>>>> === message truncated ===
>>>>
>>>>
>>>>
>>>>
>>>> ____________________________________________________________________ _
>>>
>>> _______
>>>
>>>> ________
>>>> Check out the hottest 2008 models today at Yahoo! Autos.
>>>> http://autos.yahoo.com/new_cars.html
>>>> _______________________________________________
>>>> 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/
>>>>
>>>> _______________________________________________
>>>> 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/
>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>> _______________________________________________
>>> 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.
>> _______________________________________________
>> 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/
>>
>
>