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Date:         Fri, 10 Jun 2005 06:27:28 -0400
Reply-To:     Dennis Haynes <dhaynes@OPTONLINE.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject:      Re: Rear heater core during summer
Comments: To: rrecardo@WEBTV.NET
In-Reply-To:  <25531-42A9329D-2098@storefull-3172.bay.webtv.net>
Content-type: text/plain; charset=iso-8859-1

If you turn on the heater fans, you do remove additional heat from the engine. Both due to increased cooling capacity and the fact that the heater loop is before the t-stat. However, if you do not have air flowing over the heater cores, there is no cooling effect and any water flow through the cores is water flow not available for the radiator. Normally, this does not make much of a difference if noticeable at all. The water flowing through the cores does wear the core and each time the core heats and cools will take away some of its life. So, if your cooling system is working properly, close the valves. Save the cores.

Dennis

-----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Robert Cardo Sent: Friday, June 10, 2005 2:27 AM To: vanagon@GERRY.VANAGON.COM Subject: Re: Rear heater core during summer

<<THX0001@AOL.COM(George Goff) Date: Subject: Re: Rear heater core during summer In a message dated 6/9/05 11:47:50 PM, dhaynes@OPTONLINE.NET writes: << Close it. Any coolant flowing though the heater core is coolant not available for the radiator. >> Exactly. I once notice a slight increase in the indicated operating temperature during the winter months which I eventually confirmed to be caused by the shunt through the heater core. George>>

Pipe dream. Bad info.

If in fact my vehicle ( any of them ) is running hot durring the summer months, and possibly even stuck in rush hour traffic, an old trick of the trade is to turn on the heater fans, whch will assist in cooling the overheated coolant.

More radiator mass, more cooling fan to the larger mass makes for a quicker cool down .

Less coolant for the radiator?

Nope.

If the system is bled properly the amount of coolant will be exactly the same in the radiator, as in the whole system, with or without the front and or rear heater valves open.

Good mind twisting material though. You guys actually had me thinking on this triva.


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