RE: V-6 Timing Belt

["Dupree, Jim" <dupree@alldata.com>]

I have never seen anything in print to indicate the cam timing set has
been changed on the V6 engine. the manual show the same cam alignment
tool used for all V6 12valve engines. the V8 Quattro engines also use
special tools to locate the cams in proper timing. I suspect many techs
just never loosen the cam sprocket from the cam and assume the cam
timing will be OK as long as they get the belt back on the same teeth. A
quick couple of paint marks and the job is quick and easy but not
necessarily right.
Audi did a way with a cam driven vacuum pump after 1992 model year and
replaced it with what appears to be several hundred feet of vacuum hose
and dozens of fittings. There is a TSB that describes the conversion and
a section in the repair manual that duplicated the info in the TSB. It
appears Audi was converting vehicles under warranty for certain
conditions. I have not seen any of this myself only read about it. I do
more reading that actual working these days. Being in an office each day
keeps my fingernails cleaner and I have fewer busted knuckles but I
don't see the vehicles and problems first hand as much.
Jim Dupree
1984 4ksq
1984 4ks

>----------
>From: 	Ken[SMTP:kkeith@qnet.com]
>Sent: 	Thursday, December 04, 1997 5:46 PM
>To: 	quattro@coimbra.ans.net
>Subject: 	Re: V-6 Timing Belt
>
>Chris Newbold <cnewbold@transarc.com> wrote:
>> 
>> Dupree, Jim wrote:
>> > 
>> > The understanding I have is that the cam sprockets are tapered 
>> > fit without any woodruff keys or splines.
>> 
>> Yep, this is true. 
>> (On my motor, the cam sprockets didn't even have timing marks! 
>> Makes sense, though, since if you follow the procedure, there 
>> isn't any fixed relationship between the sprocket and the cam 
>> timing...)
>
>That's insane.  What else is different between these motors and 
>the 92's that apparently had these normally necessary things?
>
>Ken
>