I ran an original recored radiator for years in my '37. After about a year or two I saw antifreeze around the top tank. I had it repaired and went for a year or so again and same thing happened. I soldered it this time. After the third time taking it out, I replaced it with a new aluminum. This solved all the leaking and let me run a much higher PSI cap. The original radiator top tank was made from brass which was very thin. Every time I drove the truck I would head the tank "pop" when it was heating up for the first time The pop was the tank expanding from heating coolant and the solder joints just couldn't handle it. I had as much money in the new core and repairs as I did in the purchase of the new radiator.
