I think i broke rear main bearing

BTW, it there a heli coil in the other hole. Was this engine apart before? That crack may have been like that from previous person. Not making sure the oil pump is flush before tightening can cause that
Idk I took it off to put the new oil catcher pump but I think i tightened it too much by accident man I'm not mechanically inclined for this guys please help I don't want to take that part off