So my Hayward Super II Pump is leaking from a hole near the motor end of the pump or where the motor mounts to #13 in the figure. Its hard to tell since its on the bottom. I replaced the housing gasket #5 and that didn't fix it. The impeller ring (#7) is sloppy and there isn't a gasket, just a plastic piece. Is this supposed to have a gasket?. Is there supposed to be a plug in this hole? Or do I have another bad part? What part would it be?