Hi "Cuz" and All: I just let the 300F work as when it was new, even though it does have a tendancy to run a little hot yet. No water added after the trip to Buffalo from Tallahassee this spring, and none after the trip to Springfield and back. I certainly agree that the use of overflow tanks in the later cars was a good idea, though. I'm just not forced into post fitting it yet. By the way, I use the propylene glycol antifreeze which is supposed to be safer for animals. 300ly, Gil In a message dated 11/11/2007 5:12:59 PM Eastern Standard Time, c300@xxxxxxx writes: I had a radiator overflow problem right after I purchased my 1955 C-300. The radiator tank was down an inch or so, so I filled it up cold. When I next stopped, the engine heat caused the excess fluid to go out through the overflow as there is no overflow/recovery bottle. If you had topped off the radiator when cold and have no overflow tank, you could have experienced the same problem. Des anyone have a combination of trick radiator cap, plumbing and overflow tank that works on the older 300's? We should all remember to try and mop up antifreeze spills as it is apparently tasty, but toxic to pets and other mammals. C-300'ly, Rich Barber Brentwood, CA 1955 Chrysler C-300 ************************************** See what's new at http://www.aol.com [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/