Wayne, I have a Case 580L that I use around the farm, and on side jobs that developed a hairline crack in the top of the plastic end cap/tank of the radiator. The local Case dealer has the part for $150ish, but told me that he really didnt want to sell it to me because according to him once you uncrimp/bend the tabs to R&R the part the tabs will break off rendering your leaky radiator totally ruined. His solution was a aftermarket radiator, but i was wondering if you had run into this and a had a solution that doesnt involve a $800-$1000 radiator? I have used a two part metal putty from Kimbal Mid-West on a plastic Chevy radiator but it only lasted 3 or 4 months. I was also pondering maybe taking a soldering iron and weed-eater line and trying to "weld" it shut or maybe just melting it back together? Any thoughts? I know it sounds like the dealer is trying to sell me a radiator, but I do a lot of business with him through my job and he has yet to steer me wrong.