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Date:         Thu, 15 Feb 2007 19:50:51 -0800
Reply-To:     John Bange <jbange@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         John Bange <jbange@GMAIL.COM>
Subject:      Re: '87 Vanagon GL ATF Cooler
In-Reply-To:  <0ba79da3c04d466aba364451efc47eb8@oberon.ark.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

> > 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"


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