if you have the engine manual it will show the drain plugs or valves. or you can drain all the low spots in the coolant side of the system. the engine block, heath exchanger ,oil cooler if it has one & transmission cooler unless that is sea water cooled. i would put water in & run it & drain it again to clear out the crud.
Liberals are people who care about others. Freethinkers are not constrained by the myths of religion.