Date:         Sat, 27 Nov 2021 17:23:01 -0500
Reply-To:     Larry Alofs <lalofs@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Larry Alofs <lalofs@GMAIL.COM>
Subject:      Re: Backwards Flow Through Heat Exchanger OK?
In-Reply-To:  <131d01d7e3a4$30c07560$92416020$@hiwaay.net>
Content-Type: text/plain; charset="UTF-8"

Was that some humor from an aircooled diehard?


On Sat, Nov 27, 2021 at 10:34 AM Tom Hargrave <thargrav@hiwaay.net> wrote:

> It works either way because the exhaust gas is so hot that the air passing
> through on the way to the cabin does not remove an appreciable amount of
> heat.
>
> Thanks, Tom Hargrave
> www.kegkits.com - Electric Brewery Info
> www.towercooler.com - Beer Tower Cooler
> http://goo.gl/niRzVw - My Amazon Store
> www.brew-control.com - Electric Brewery Marketing and Direct Sales
> http://www.hackpilot.com/roadkill/ - A little twisted humor
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Derek Drew
> Sent: Saturday, November 27, 2021 7:24 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Backwards Flow Through Heat Exchanger OK?
>
> Is the heat exchanger in the heater box indifferent to which hose is hooked
> up in the forward/lower position and the rearward/upper position in the
> heater box?
>
> The reason I ask is because I was looking at a (excellent) GoWesty repair
> video for the heater box and it shows them starting off with the hose that
> enters the vehicle in the floor on the passenger side ("Right side") going
> through a clamp next to the heater box and then gong to the "TOP"
> (rearward)
> position in the heater box, what we could call CONFIGURATION A. Some text
> in
> the video emphasizes the same thing, saying "Rightmost=Top" and
> "Leftmost=Bottom" for our CONFIGURATION A. But then at the end of the video
> at 12:46 as they are finishing up they show the configuration the other way
> around with the hose entering the floor on the "Right Side"
> (passenger-side)
> going through the clamp and then to the lower (forward) hose connection on
> the heater box, what we could call CONFIGURATION B.
> Their video which shows the hoses connected first one way, and then the
> other way, is here: https://www.youtube.com/watch?v=h7wgsznvcCE
>
> Then I looked in one of my syncro campers ('91) and the last mechanic
> hadn't
> hooked up the hose clamp to the frame at all, which suggested to me I had
> resolved why I could not close the glovebox after that service. It was
> while
> trying to figure out the hose clamp configuration that I noticed the
> discrepancy in the GoWesty video about which hose gets clamped to the huge
> frame cross member on which the heater box sits.
>
> Then the plot deepened because I noticed that my van had CONFIGURATION B
> where my "Right Side" (passenger-side) hose was also connected to the lower
> (forward) hose connection on the heater box, as Go Westy did at the end of
> their heater box video. At this point, I paced around in the garage for a
> moment and had strong WTF-type feelings for a second.
>
> I then noticed a great UK video equivalent to the Go Westy video from
> (adorable?) ItalJohn here:
> https://www.youtube.com/watch?v=DozqP2ADdHw His hoses were hooked up in
> CONFIGURATION A (ref 5:31).
>
> So, I suspect that with configuration B my hoses are hooked up backwards to
> the heat exchanger. A question is whether I should create a little coolant
> mess in the van and fix this or whether the heat exchanger really doesn't
> mind what direction the coolant is flowing through it.
>
> I could not think up a search query to resolve this, although I did find
> some wishy washy suppositions that maybe the heat exchanger doesn't care
> about the direction of flow.
>
>
> _______________________________________________
> Derek Drew
> Sharon CT
> derekdrew@derekmail.com
> Email is best normally but...
> Mobile: 703-408-1532 (voice and texts)
> -----
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