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Date:         Tue, 27 Aug 2013 09:49:56 -0700
Reply-To:     Dick Wong <sailingfc@DSLEXTREME.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dick Wong <sailingfc@DSLEXTREME.COM>
Subject:      Re: Cooling issues?
In-Reply-To:  <025e01cea33e$de9f1330$9bdd3990$@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

I'm a bit confused on your reference to 190-200 and 210-220, but then you say 112 and 119.

119f for coolant temperature is "lukewarm". Think about it, if you open the pressurized coolant tank on a hot running engine, you usually get a boiling effect. That's 212f+. If anything, you have a stuck open thermostat and you have too much coolant flow.

The thermostat controls the amount of coolant flowing into the radiator, not the pump itself.

A lower temp fan switch and a higher CFM fan won't change anything at freeway speeds, as the fan typically does not need to come on at those speeds.

From what I recall, a 13psi working cap should get you about 251f before boilover. So your highest temp, 220f should be fine.

Using an infrared thermometer is a good way to check the surface temps of parts.

-Dick- 78 Scirocco 87 Vanagon Syncro 12 Golf TDI

On Tue, Aug 27, 2013 at 9:02 AM, Stuart MacMillan <stuartmacm@gmail.com>wrote:

> Those temps don't make sense to me. 112f? a hot tub is hotter than that! > ;-) > > Get yourself one of these and figure out what's really going on: > > http://www.harborfreight.com/infrared-thermometer-with-laser-targeting-non-c > ontact-69465.html > > Best to aim at a hose near the T-stat or put a piece of black tape on the > housing. > > I don't necessarily recommend this, but you could leave the hatch off and > have someone kneeling on the back seat take these measurements at speed. > Be > sure your helper is someone with enough sense to stay well away from the > engine and not lean over it! The gun works well at a distance. If you > can't see the T-stat from the seat, then cut a piece of plywood wider than > the hatch but shorter front to back so you leave a gap to see the target. > Helper can lean on this. BTDT. > > Stuart > > -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of > ralph meyermann > Sent: Tuesday, August 27, 2013 7:48 AM > To: vanagon@GERRY.VANAGON.COM > Subject: Cooling issues? > > Hi all, just finished a trip with the New powerplant and on the way up I > was > running between 190-200f little head wind and fairly cool, on the way back > 210-220f with a 20-30 mph head wind. I was noticing that with the > accelerator in the same position running 60 mph it was about 112f and 65 > mph > 119f? Could the water pump be flowing too quickly to efficiently cool? > I am planning on a new aluminum radiator, a lower temp fan switch and a > higher cfm fan? Any advice is appreciated as always, thanks! Still 19.7 mpg > with big head wind and pulling small 15' aluminum bass boat. > Velma 82 1.9L AAZ td westy >


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