just a thought..

[Roa, Greg]

Let me venture a guess.  I'm willing to bet that you don't have a belly pan on your car.  In addition, some of the masonite shielding in the engine bay is likely deteriorated or missing.  Not saying there is a problem with your car, but I've never seen a 4kq with a belly pan, and most of the time some of the shields that came with the car have seen better days.
I would think that the engine bay was set up originally by Audi so that the belly pan and shielding kept air flow at a minimum around the engine while driving, (and therefore the area around the sensors) while maximizing the flow through the radiator itself.
I'd say if you really want to fix the problem, restore all of the shielding to it's original condition, and replace the belly pan.

If you do go this route, let me know how it turns out.
As for me, I've got too many other projects on this car, so I'm going the easy route and making a shield.

Good Luck!
Greg Roa
Cincinnati, OH
86' 4kcsq
93' 90 CS
83' 944


From: "jesse" <clerick44 at earthlink.net>
To: <quattro at audifans.com>
Subject: just a thought..
Date: Mon, 6 Jan 2003 12:11:29 -0600

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    I have the same problem that some of you do with the water temp droppin=
g at highway speeds then coming back up at idle.  I too have shielded the e=
ngine bay to keep the wind away from those bits.  It has worked well, BUT i=
t still bugs me that this probably shouldnt happen.  I would prefer to trea=
t the problem and not symptoms.  Anyone have any ideas what might be the ac=
tual cause?

Thanks,
Jesse