Re: What is the best Thermostat temp?

[Todd Phenneger <phen9461@uidaho.edu>]

No, I think is reading acurately.  Just the the fluid in radiator is
fluctuating through a wide range of temps due to the nature of the Fans
operation.  That the way I read it.
L8R

	Todd Phenneger
	1984 4000s quattro / modified/ awaiting Turbo Transplant.
	1985 4000 quattro / Silver / Fixing it Up.
	1987 4000cs quattro / Saphire Metallic Blue/ Girlfriend's
	1996 A6q / Volcano / Dads Car
   *****1985 5kt / PARTING OUT!

On Wed, 2 Dec 1998, Zsolt Kovacs wrote:

> Does that mean that the engine temp is actually NOT fluctuating it's only the
> sensor showing me weird values because of it's location?
> 
> Buchholz, Steven wrote:
> 
> > > > This is my 4th Audi (this time an 86 5k CD tq) but they all did that.
> > > The
> > > > temperature ranged between about 80C-110C depending on outside
> > > temperature, and
> > > > driving conditions. I am also curious to get an answer from someone with
> > > more
> > > > experience why that is. I had an old MB 200. Once it warmed up the temp
> > > guage
> > > > didn't move. Why does the Audi's?
> > >
> > >       I agree.  My old Jeep Cherokee, our old Van, my 65' Buick, even
> > > our old Fuego Turbo stayed the same.  Yet every older Audi I know of does
> > > this flucuation thing.  That is a good question why they do this.  I know
> > > my friends VW Jetta does this too.  I wonder if the way the thermostat
> > > works just seems to be all or nothing than other cars.  I really have no
> > > idea though.  L8R
> > >
> > ... I'm not familiar with the Fuego, but I'm pretty sure that all of the
> > other cars use some sort of radiator cooling fan that is attached to the
> > engine to ensure that there is air flowing through the rad when you aren't
> > moving very fast.  This would be a bit difficult on most of the Audi's I'm
> > familiar with, as the radiator is mounted in line with cylinder #1 ... :)
> > The reason you see the temp fluctuation on the Audis is that when you are
> > travelling at slow speed the water temp will increase until it reaches the
> > temperature at which the rad fan turns on ... at which point the airflow
> > will be increased and the temp will come back down.
> >
> > The V8q has a rad cooling fan attached to the front of the engine as well as
> > an electrically operated one ... although I still see some variation in
> > temperature, I must say it is nice not to see the needle hovering by the red
> > mark ...
> >
> > If this bothers you, you can always rig an auxiliary switch to allow you to
> > turn on the fan when you feel it is appropriate ... I almost installed this
> > mod on my old Fox ... but it would have required adding wiring all the way
> > out to the fan as I didn't have A/C ...
> >
> > HTH!
> > Steve Buchholz
> > San Jose, CA (USA)
> 
> 
>