blacknight

I was getting the code and no start condition so I pulled the starter to get to the sensor and it was handing off the block. The extruded part of the block with the bolt broke off. Causing a small hole and a stress crack on the bottom. I can't understand how this would happen. There isn't any stress of torque on sensor. It looks like it has been cracked for a while. Is this something that maybe be welded or is the block trash?