3B to AAN conversion and vice versa.

Ben Swann benswann at verizon.net
Tue Jun 17 20:30:04 PDT 2008

OK - There are some difficulties - not insurmountable.

So far I see the boss to mount the Hall/Cam Position sensor is the most involved.  It
seems the head for the 3B casting had a boss welded to it or manufactured during
casting.  Looks like I'll need to replicate this accurately.

I have the different water manifolds - both engines will actually get the 3B intake.

There needs to be a few additional holes drilled and tapped to move the AAN pump to the
3B block.

Making the AAN into a 3B seems more straight-forward.


-----Original Message-----
From: Peter Schulz [mailto:pcschulz at comcast.net] 
Sent: Tuesday, June 17, 2008 10:07 PM
To: Ben Swann
Cc: 200q20v at audifans.com; s-car-list at audifans.com
Subject: Re: 3B to AAN conversion and vice versa.


the mount for the cam position sensor under the AAN cam gear comes to mind...
also, I believe that the exterior water manifolds 
may be different to accomodate the different intake manifolds.


bAt 09:57 PM 6/17/2008 -0400, you wrote:
>Don’t ask why ­ just need to convert an AAN 
>block and head to 3B setup and a 3B to an
>AAN.  Trying to see if there are any gothcha’s I’m missing.
>So far I can see I need to swap oil pumps and 
>the AAN pump requires I drill and tap two
>additional holes for the timing belt tensioner.
>Is there more to the head than just swapping cam cover?
>I’m swapping all manifold and fuel injection,etc.  Just the block part was an
>unanticipated surprise.  I’m committed to doing 
>this by tomorrow eve. So appreciate any
>quick and helpful replies.
>200q20v mailing list    http://www.audifans.com/mailman/listinfo/200q20v

-Peter Schulz
Chelmsford Ma, USA

1995.5 S6 Avant Emerald/Ecru
1995.5 S6 Avant Silver/Platinum
1991 200 20v Q Avant Titan Grey (for sale)
1991 90 20v Q Red
1991 CQ silver  (eS2 recipient) 

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