Can anyone recommend a radiator brand. i'm on my third one. They rust like they're made of tin. Right now I have about 2 inches at the top of just the vertical pieces, the wavy lines are almost gone there. Plus there's a leak. my first one was from the dealer, my second I got at an autoparts store, my third a mechanic put in. I have a '92 wrangler with the 6 cylinder, AC, external tranny cooler and about 150k miles. thanks