4kq: Wierd oil temp behavior/ *classic* audi humorousness!

[David Ullrich]

Check the gauge grounds. Sounds like one is loose. I've found the grounds
can cuase this behavior. In the case of my CGT, the gounds used to cause the
gauge to read too high if there was any serious electrical drain (like the
AC blower, or cigarette lighter). My CGT's oil guage (same led gauge as your
4kq) will be around 90*C in town and out on the highway will run aout 130c
but if I am really pushing her it will slowly climb to 140-145c. But if I
have the AC (or heat) on full blast (#4), the guage will show about 30*C too
high. All I have to do is turn off the blower and it comes back down. Once I
cleaned the grounds, the problm went away for a year or two, but has come
back. Now I just live with it. If I get paranoid about th reading, I just
turn off the blower for a minute or so.

Dave
1987 CGT 2.3
SE VA


On 8/22/06, Robert M <porter_t_dog at hotmail.com> wrote:
>
>
>   My 4kq has always been really boring, temperature wise, in the 4 years
> I've been driving it.   Unless I'm idling in traffic the water temp gauge
> is
> in the lower third, and the oil temp gauge (the LED one to the right of
> the
> difflock control) is somewhere around the middle of the scale.
>
> Then, one day a couple weeks ago I noticed the oil temperature was a lot
> higher than normal, about 3/4 of the way to the top.   That was a hot day,
> and as it seemed to be a one-time thing I put it out of my mind.  Until
> Sunday, that is.
>
>   About 45 minutes in to a 3 hour drive I noticed that the oil temp was
> high again.  Worse yet, in the next 5 minutes or so it continued to climb,
> to a point one LED short of the Red Zone.   Despite the fact that the day
> was cool and my water temps were low I pulled off the higway to
> investigate.
> Coolant bottle full?  Check.   Coolant bottle and radiator hot?  Check.
> Oil on the dipstick?  Check.   Any feeling of unusual heat in the engine
> department?  Negative.  Oil smell burned?  Negative.   Hmmmm.  I got back
> on
> the highway, relieved to see that the oil temp had dropped back to what
> I'd
> consider normal.  In 2 minutes.   Weird!
>
>   Driving on for another mile or so the temp began to go back up.  It hit
> the red led, and then the display went blank.  Surprised, dismayed, and
> not
> a little freaked out, I reached out and tapped the LED panel like one
> would
> a mechanical gauge that was acting up.  *Much* to my surprise, the gauge
> not
> only came back to life but upon reillumination the lit LED went from the
> top
> slot back down to the normal zone, cycling through every LED in between.
> Again, *just* like a sticking mechanical gauge.
>
> It was just like the Reactor Coolant Level gauge in "The China Syndrome".
>
> The Audi gods have a twisted sense of humor, but at least they left me
> alone for the rest of my drive ;)
>
>
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