pumping it out is crazy. pep boys has a thread repair kit for ~10 dollars that has the tap and bit and stainless steel inserts to repair the threads. OR drill a hole in the plug and tap with 1/4" pipe thread and use a brass pipe plug that seals without a gasket and can be replaced for 50 cents. Suction will not get the heavy particles out. Increasing the effort and expense of the oil change does not increase the value of the operation.

mike