Alain,

My van does exactly as you describe.  My mechanic says my cooling system is
leak free yet I get these unexplained huge drops in coolant level in the
reservoir tank without any signs of leaking.  I just check it regularly and
keep it topped up.  The reservoir goes below min on average once a month.
Let me know if you find an answer to this mystery.

Kelly Bauman
Delta, BC
'91 Westy

>My van doesn't seem to have any leaks but I notice that my refill tank
>was at the minimum mark after having been filled up two weeks ago.  It
>seem to have dropped in a matter of a couple of days after being stable
>for a couple odf week. Is it normal to add coolant here and there...or
>should the coolant always stay at the same level ?
>
>Thanks
>Alain Thibault
>Westfalia 1991
>166000 kms
>
>