Kenmore 587

You may try the rubber gaskets and fasteners that attach your heat element through the bottom of the dishwasher body. This is the only full penetration of the shell involving metal that I see. You could see these fasteners if you remove the dishwasher from its current position, rotate it clockwise on its side and see the two cheapo pressed metal nuts on threaded studs that have wires attached. These keep that black metal loop on the bottom (inside the washer) in place. Remove wires, unthread pressed metal fasteners, check heater element for the rust issue (replace if needed) and reinstall new rubber gaskets and fasteners. Hope that helps!