[Jackflash]

As related in another thread I drug the Aquahot exhaust trying to back into my driveway a couple of weeks ago and ended up with a puddle of coolant on the street.  I assumed that I had cracked the weld where the exhaust enters the tank.  I talked to Rudy and he tended to agree but suggested I pressure test it to make sure.  I finally got my hands on a pressure tester and after pumping it up I got no leaks.  I fired it up on diesel and brought it up to near boiling but still no leak.  After starting the engine to pressure up my air systems to check them I started getting the leak.  Any Ideas?