I second the egg whites. We had a fan come undone on a 353 Detroit Diesel that went through the first core and a half in the radiator. They wanted something like $900ish for a used radiator in the skidder, so we went ahead and just soldered the tubes as best as we could and then installed it and had quite a few leaks, then we added the egg whites and there were 0 leaks after that.

Just my little related story on why egg whites are cool.
