OK, I get it. But what is happening to the coolant that is retained in the block waiting to go through the radiator? It's temperature is going up because it is held by the heat source longer. The longer it's in the block the hotter it gets, so where is the benefit in slowing down the flow? If it's just about TIME, that works both ways as I see it. Besides, when an engine is hot, the thermostat is fully open anyway. Any thermodynamics experts out there? I've heard this point being debated for years and have never had a good answer to fully explain what is happening. It seems to me to be all about surface area responsible for cooling not the speed of the flow. Bob J _____ From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of james mcmullan Sent: Tuesday, June 23, 2009 8:23 AM To: Listserver Subject: [Chrysler300] Short lesson in thermodam Hi List .You cannot move Cold ,You can move Heat (ether in or out of something) But it takes TIME .You haft to hold watter in the radiator long enough for the heat to transfer to the core and be removed by air flow.That is the the purpose of the thermostat .If the watter flows to fast it will not have TIME to transfer heat Jim McMullsn 300 F. [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: mailto:Chrysler300-digest@xxxxxxxxxxxxxxx mailto:Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/