very good question, something I did not think about....
I have not drained it, however it does have decent coolant leak. I keep it full but I bought it knowing this. It also had this cranking problem as well. I am not sure if the PO filled it correctly or not. Its a freeze plug int he back of the motor so I am waiting til I pull the trans do to the doubler and do everything at once. it should happen soon.
is there a vent plug or something I need to pull when filling?
No, They say to fill it on an incline with the heater control on heat, then run it up to temp let cool and check again do this till you can't put any more coolant in.
