Fill radiator, leave cap off
Open up bleeder hole above thermo housing
Turn car on and heater on full
Watch radiator level drop, keep filling it until it starts spitting out breather hole. Close breather hole
Leave car running and and watch for radiator to drop a bit keep filling until stays full, put radiator cap on b4 it gets too hot
U also need a funnel that sits higher than engine, we put a fat hose into radiator filler and held funnel into the hose high