I had a radiator built for my '27 years ago by the BrassWorks, and after a few years of shaking around up front it started to leak. When I took it to a local radiator shop he said it was because of the solder that Californians are mandated to use because of the environment. He said he has seen that before. Don't know if it was a sales pitch or not, but he resoldered it for me anyway.

Don