I fought radiator leaks for many years with copper radiators. Back in the early 80's I noticed that Mercedes had aluminum radiators and I never had any problems with them. Probably 25 years ago, International went to aluminum radiators with plastic tanks. The tanks broke after about 5 or 6 years causing the truck to need a tow. About 10 years ago, International started offering Modine all aluminum radiators. I buy after market all aluminum radiators for about 1/3 the cost of a Modine. I have yet to have an all aluminum radiator to fail. I have bought about a dozen radiators from these guys. They claim they make them right there in Alabama.
http://www.cgj.com/ I keep at least 2 spares on hand for when the tanks fail on the OEM radiators and they make me a deal when I buy 3 of them at a time.
