>
> Yeah, but only when the thermostat is open!
> ---------
>
> Yes John, I fully agree with you here.
> I cannot conceive of a condition where this would be a
> problem or issue? Works like a stock cooling system, AFAIK.

 Yeah, that's just like the OEM setup, basically, only with a better heat
exchanger. I did mine a little different, with the stock ATF heat exchanger
plumbed in in place of the rear heater. This let me save a few hundred bucks
those ridiculously expensive tee hoses. My thinking was this made more sense
in relation to the claimed  purpose of the coolant-exchanger system. I
recall reading that the intent was to keep the tranny at the same
temperature as the engine, not just cooling the ATF when it's hot, but
warming it up when it's cold. Thing is, the fact that the heat exchanger
gets no flow until the engine warms up to full temperature kinda flies in
the face of the whole "bringing the ATF up to temperature" assertion. With
it plumbed in parallel to the heater, the engine and transmission are always
about the same temperature. Really, it probably doesn't matter either way.
One way the radiator circuit gets less water and comes back colder, and the
other it gets more and comes back warmer. The radiator is so oversized it
doesn't really matter.

--
John Bange
'90 Vanagon - "Geldsauger"