Here’s some pics of an aluminum bar-and-plate heat exchanger that came in leaking. It’s an oil cooler for an Epiroc drill rig drilling machine. There was a crack in one of the welds where the tank is welded to the core. We ground down the weld area at the crack & prepped the crack for tig welding. After we got the tank to core seam all tig welded we pressure tested the cooler to ensure it has zero leaks.Motor Mission Machine & Radiator(702) 649-2366 or (702) 649-0648