2 different 12v V6's? [Was: V6 Oil Filter numbers]

[Sean_Ford@idx.com]

I have to admit ignorance on this topic. I did not know that there were 2
different 12valve V6's out there; the AAH and the AFC. I've got an early
build AAH, and all of its inherent problems. Luckily, I'm a low mileage
driver and so I'm not necessarily seeing EVERYTHING that could go wrong
with my engine.

My question is, what are the main differences between the AAH and the AFC
engines? Elliott Potter has mentioned that the AFC engine received an
oiling system with a higher flow rate to ensure that the top end is
swimming in oil. Apparently, that is not the case in the AAH engine and,
frankly, that worries me. A lot.

I wonder what other changes were made to the 12valve V6, and why? I highly
doubt that any answers would be forthcoming from AoA, nor from the
FatherLand...  seems to be their SOP, and probably an admission that
SOMETHING was wrong. You should see/hear the denials that anything was ever
wrong with the early V6 head gasket, and they'd like you to believe that
the head gasket design change in '93 was simply a cosmetic thing. Don't get
me started on that... f'n $1600!

So, who knows? Anyone?

Sean Ford
'92 Audi 100CS 5-spd 43k mi
http://www.geocities.com/MotorCity/Downs/5528




Michael Murphy <mmurphy@nais.com> on 01/28/99 06:37:46 AM

To:   quinn
cc:   Chris Newbold <Chris_Newbold@transarc.com>, Sean Ford/BOSTON/IDX1,
      duane@hunch.zk3.dec.com, Mark_Quinn.H@hns.com, nstickney@hns.com,
      Elliott Potter <epotter@abraxis.com>
Subject:  Re: V6 Oil Filter numbers
Body:



To all,
The long filter appeared with the switch to AFC engine in mid 1995.

In the filter catalogs, confusion reigns supreme on the AFC filter.
BoschUSA #72199 is 142mm high, no anti drain and a bypass setting of
11-17psi.  Mann's W719/25 is 132mm high, anti drain and bypass set to
27-35psi. Don't know what Mahle's OC154 is (no catalog).  For the
filters database, I am trying to find out from AoA what are the correct
specs for the AFC motor, but no joy so far (no surprise there).
---
Mike Murphy

quinn@hns.com wrote:
>
> Chris Newbold wrote:
>
> >I'm with Sean, here. Why did Audi switch to the larger filter? Prior
> >to this thread, I had thought the larger filter was introduced with
> >the 30V motor. I could understand a larger filter in such an application
> >(presumably they need more flow). But it seems like the larger filter
> >appeared quite some time before the 30V...
>
> Ohhh, this (earlier long filter change interval) is news to
> me.  Kinda throws out my theory of the bigger filter being
> for the longer interval then, doesn't it?
>
> BTW ... my A4 is a '97 with the 12v V6.  The '96s have the big
> filter also.
>
> -Mark Quinn