The mechanic that I have taken it to the last two times has pressure checked
it, so shouldn't he have found it.  I am not sure that my skill at finding a
leak will be any better than his.  I also noticed this morning after
starting the vanagon and letting it warm up that it is now dripping from the
left front bolt on the square at the bottom of the engine.  This weekend I
plan to look more closely from the top and sides, but it was too cold this
morning.

Can I get the adapter for the bicycle pump contraption at the auto parts
store?