ive been reassembling my motor and its accessories after replacing a piston. i forgot to put the thermostat in the housing before i bolted it up and had an idea. ive been wanting to delete the mechanical fan for some time. would it be safe to leave the clutch fan off if i left the thermostat out or do i need to put that thermostat back in there and get me an electric fan? would the coolant flowing freely at all times make up for the lack of the clutch fan?