I looked at my exp. tank, when the van was at operating temp. [middle 
of light], and it was dry. I have not seen any puddles and it has been 
3 mo. since last service.
Do I�
Top up? and if so with water or antifreeze (or mix)
Have service done?
freak out and assume the airline crash position?

gonna look in The Good Book, but don't know if I can find diag. info in 
there.
thanks
Steve-V
'87 westy
Santa Cruz