Hi Tom, hi Volks,

On Mon, 1999-04-12 11:58:54 -0700, Tom Clein wrote:

> ...
> I decided to 'top off' expansion tank with water in an attempt to
> quash the flashing LED.

The expansion tank (as  opposed  to the refill  tank)  has always to  be
filled up to the rim, and thus  you should never be  able to top it off.
If you are able to  top it off, there's  gas in the system which  should
not be there.  This gas is  either just air, then  you're lucky and just
have to bleed the cooling system correctly, or its combustion gas, which
would mean your head gaskets are leaking.  Some shops have test tools to
check the coolant for combustion gas residues.

> ...
> 2.  Incorrect composition of coolant solution - see 1 above

Sorry, I know  that's in the  archives, but that's  bogus  non the less.
The sensor  in  the   expansion tank  only checks  the   level,  not the
composition of the coolant.

Hope this helps.

Sincerely
 Rainer

'89 Caravelle GL Syncro 16"

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