The guy is trying to avoid removing the pan…With the oil drained, the pan flushed out (with kerosene or solvent) and allowed to drain overnight, then jack up and support ONE SIDE of the car so it’s on an angle and there is NO seepage from the crack, then grind it clean, wash with acetone, and apply slow cure epoxy made for metal repairs. Speed curing with a heat lamp. Or weld it. Done this way, the epoxy will not fail.