Kenyon, The first thing I would do is install a filter in the top radiator hose to keep all that junk from clogging the radiator. You can pick up a filter for about $35 from: Gano Filter Company 1205 Sandalwood Lane Los Altos, California 94024 650-968-7017 Beware, they are very low-tech people. They don't have a web site, nor do they accept credit cards. You call them, tell them what you want, they tell you how much, you send them a check, they send you a filter. It seems to work as they've been doing it this way for several years. I think Prestone makes a pretty powerful flush kit for the cooling system but I'd have the filter in pace first. Once the flush kit starts to break loose all the rust scales, they have no place to go but into your radiator. Ken 67 Crown 4 Dr Ht 68 LeBaron 4 Dr Ht -----Original Message----- From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of Kenyon Wills Sent: Tuesday, October 30, 2007 1:11 AM To: IML Subject: IML: Cooling system "cleaning"? Had the engine rebuilt. Apparently the water passages of the block weren't cleaned. Thought it was boiled, but maybe not. So the water I put in turned bright brown with Rust and I'm at 600 miles now. Someone else in the garage today said that there was some remedy such as 4 table spoons of Borax into the radiator, so I'm here to hear about old wives tales on this. Aside from new coolant, anything else to abate the rust particulates that are going into suspension in the coolant, presumably out of the water jackets in the block? New radiator, pump, hoses and everything else... Used, freshly rebuilt 1970 440 block, obviously. By the way: I researched this REPAIR by clicking on that button on the club website and then clicking on COOLING SYSTEM and there are no apparent remedies besides flushing listed there. Any thoughts appreciated if not acted upon. Kenyon Wills __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to iml.webmonster@xxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to iml.webmonster@xxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm