[Jac Mac]

John, I feel your pain, over the years I have made mods etc to many oil pans.. I gave up using water to check them, now I use kerosene, it seems to only need a couple of seconds to migrate thru even the smallest crack or pin hole & doesnt evaporate before you get to see it on a hot day....just be careful with it around the hot weld areas & give them a minute or two to cool off...plus keep it away from the torch..