RC..... .radiator stop leak and waterpump lubricant will all float some gunk and these products have been used to bandaide other problems. Your sheen floating on top of you water could mostly be combustion by-products from a leaking headgasket. I would take a compression check, dry and wet, first. Even if unconclusive, Head gaskets are not that expensive. While I had the head off, I'd check it for warping, and if suspisious, take it to a machine shop to be milled, shaved, skimmed, whatever... When you take you head off, you'll natchurally change your anti-freeze and get rid of all those snakeoil helpers, and make certain that you have a thermostat in the new upper radiator hoze. But before you turn a wrench, ya' best have an I&T FO-4 repair manual handy, good info and pix's. Commonally available at most tractor supply stores, including Ford/New Holland. Also available from "www.n-news.com", great archive of all sorts of manuals available too. N-Newsletter is a good read too. As for the wife, as I remind my wife, I'm the cheepest mechanic she'll ever hire, "will work for food" but I flunked "mind-reading". Good Luck..... .Dell
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