does your oil temp gauge do this?

[amalventano at sc.rr.com (Allyn)]

> -when you shut the engine off but leave the ignition on(turn off switch
back on immediately), it shows about 2-3C less than before.

thats a ground issue. particularly the connection from the block to the
chassis. if the ground there is weak, it causes an offset ground, which
effects the output of the oil temp sender (which is a voltage with respect
to the (now unstable) ground).
the battery to chassis ground connection can also cause this.
Al

----- Original Message ----- 
From: "Robbie Cotner" <robw_z@yahoo.com>
To: <scirocco-l@scirocco.org>
Sent: Saturday, July 12, 2003 12:10 AM
Subject: does your oil temp gauge do this?


> I've owned my Scirocco for about two years now and haven't noticed this
problem until recently.  My oil temp gauge is funky:
>
>
> -when I use the turn signals the needle bounces a bit.
>
> -when I turn on the parking lights it reads about 1C higher, headlights
bring that up to 3C higher, and brights make it 5C higher(so with all on it
is 5C higher than with all off).
>
> could this be in any relation to why my oil temps have been about 10C
higher than usualy lately?
>
> -Rob
>
>
>
>
>
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