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If it was overheated, you may have taken out a head gasket and the cylinders are full of coolant. That will prevent it from turning. At this point, I would suggest removing the spark plugs and seeing if it will crank. With the plugs out, coolant will not cause a hydro static lock and the coolant may come out.
Since it overheated, that is a theory at this point. Also, make sure the oil isn't contaminated with coolant as well as make sure the coolant level isn't low.
One other thing you can do is try turning the engine with a breaker bar and see if you can turn the engine by hand at the crankshaft. Honestly, if it overheated, this is what I suspect has happened.
Let me know if I can help.
Monday, October 21st, 2019 AT 6:31 PM