[kwmech]

I wouldn't worry at the moment. Placement of the dent is not in a critical area where the pickup tube is. When the pan comes off just pound the dent back with something like a 2x2 block of wood or a round dowel. I've sometimes used the blunt end of another hammer handle. I've seen dents like that a lot over the years from people using a floor jack without a block of wood on them