Thank you Warren and Steve, for your excellent comments on radiator cores. The bottom line is, of course, actual heat transfer, not just size/thickness or flow rate of the replacement core. I will definately keep Craig cores in mind the next time I need one. (When I get the AC functional on the ole "H"?!!) Thanks again for the tip. 300ly, Gil C. in occasionally warm Tallahassee, Fla. [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 Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> 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/