At 10:14 PM 4/22/2010, Tobias Gogolin wrote:
>last week, what i'm talking about is that a few seconds after starting the
>van the light begins to flash in the instrument rises quickly to max.! I
>wonder what this is now! Maybe the oil in the coolant is making the level
>sensor think, lack of water? Since no water gets into the oil (yet) i'm
>s

Oil might do that -- clean the pins of the sender and if possible
make them shiny-bright with 1500-grit paper.  If you have more than
about 180k across the pins it will set off the low-coolant alarm
after a few seconds.

If there *is* a bubble in the pressure tank it should stay there,
that's the automatic purge point into the overflow tank.

Yours,
David