The cooling system needs to have a thermostat for several reasons. One is for wear. You will get 3 times more wear on the cylinder walls at 120 degrees compared to 180 degrees. The water pump has to have something to push against to keep the pump and water from cavatating which will cause over heating and no water flow. It will keep warm air to keep your body warm. The larger thermostats help flow more water is ok , But is really designed for larger Radiators that need more water. Such as motor Homes, Trucks etc. Gary Barker, Meadow Vista --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 100604-1, 06/04/2010 Tested on: 6/4/2010 3:59:43 PM avast! - copyright (c) 1988-2010 ALWIL Software. http://www.avast.com [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@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: Chrysler300-digest@xxxxxxxxxxxxxxx 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/