I would go for the stat replacement. You can test in hot water. Just before boil it should be fully open. Thank you, Gary, the parts doc Reno, Nevada 89521 USA The Biggest Little City In The World Mail: garythepartsdoc@xxxxxxxxxxxx 775 851-1420 -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx]On Behalf Of Matt Allyn Sent: Thursday, February 17, 2011 8:11 AM To: Chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] 1962 300 - Cooling Question Here's a constant temporary issue I am having.... When car is cold, from sitting all night... It starts up fine, I warm it up for 2 minutes and then start to drive. About 5 minutes into the drive the temperature guage begins it s ascent to it's normal spot; just about a quarter of the way up from the dead cold position. Then the needle keeps going, all the way to the HOT position, where it sits for a minute...and then it creeps back down to the quarter mark. Here is what I have done to date: - Pulled the NEWER radiator and had it flushed - Flushed the block out twice - Water Pump is fairly new on the 45,000, new everything, motor - Newer Hoses are not collapsing - Heater core is clean and works - I have "burped" the radiator All I can think of is that the Thermostat is taking too long to fully open and needs to be replaced?? Who's with me? (Just a pain in having to lift up that A/C Compressor to make that change.) Thanks! Matt Allyn [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 To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! 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/