Hi Mark, I had my stock radiator recored and the guy suggested to add rows to the max capacity. When he did this, it actually made the radiator a little thicker and it never overheated. That company is now gone, but one that I know does repairs is listed below. Give them a call. Lake Zurich Radiator & Air Conditioning 785 Oakwood Rd Lake Zurich, IL 60047 Map a.. (847) 438-4334 There was a small leak between the top tank and they were able to repair it after the original company went out of business. One thing he told me was that it is a good idea to slightly reduce the radiator cap pressure for some of these old radiators. He said the stock cap (14PSI ?) may actually cause the top tank to separate under high pressure/heat and he felt that the stock cap pressure was really not necessary. I would be interested in knowing any comments on this. I still have the stock cap on there with no problems now. Regards, Mark Lindahl '63 300 Conv. ----- Original Message ----- From: Knutsen, Mark C To: chrysler300@xxxxxxxxxxxxxxx Sent: Friday, August 29, 2008 2:57 PM Subject: [Chrysler300] Radiator Re-core, Additional Rows Any suggestions on radiator shops in the Chicago/Rockford Area for a rebuild on a 1961 G? Also, any thoughts on adding an additional row of cooling tubes to the stock radiator? It was recommended to me by some of the local mechanics but curious if anyone has tried it yet. Thanks in advance Mark Knutsen 300 G. <http://geo.yahoo.com/serv?s=97359714/grpId=3732744/grpspId=1706713852/m sgId=23179/stime=1216714814/nc1=4430620/nc2=4507179/nc3=4836044> [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/