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Date:         Thu, 6 Oct 2011 10:22:59 -0600
Reply-To:     Robert Stevens <mtbiker62@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Robert Stevens <mtbiker62@GMAIL.COM>
Subject:      Re: Radiator performance and replacement
In-Reply-To:  <vanagon%2011100611281813@GERRY.VANAGON.COM>
Content-Type: text/plain; charset=iso-8859-1

On Oct 6, 2011, at 9:19 AM, Ed McLean wrote:

> However, when following any vehicle, and more so if > that vehicle was a large truck, the return coolant temperature would climb > although the feed temperature initially remained the same. As the return > temperature climbed above 195º the feed temperature began also to rise, > indicating the radiator was no longer able to control the cooling demands of > the engine. If I then moved out from behind the truck, the return > temperature would drop, followed quickly by the feed temperature dropping. > I was surprised that this effect was present even up to ~200' behind a truck.

I noticed the same thing this last spring, coming up 191/6 toward Price, UT fro Moab. Also, there was a fairly strong following-wind/tail wind, blowing S to N. The combination of those 2 things contributed to the coolant running at 10 degrees hotter. Whenever I would move out from behind the vehicle in front of me, within about a minute the coolant temp would drop 5-10 degrees.

By the time I got to I-15 the wind was from the N and I could easily change lanes to avoid being behind larger vehicles and the temp was again, 10 degrees cooler. My radiator was replaced 4 years ago and is in very good condition.

Bob


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