this may sound crazy but crack about 2 or 3 eggs in it ,it worked in my 90 model escort.
vacuum leak
radiator leak. try adding " leak stop"
Remove the radiator and take it to a radiator shop.
water leak or bad thermostat
Cooling lines from transmission to radiator?
look for antifreeze coming out of the radiator as the engine warms up after a cold start.
you may have a loose seal or a pinhole leak i would get it checked out asap
Coolant leak? Check your heater core.
The simple and really only answer I can give you is to find the leak and repair it.
Leaking radiator radiator hose head gasket water pump Heater core thermostat housing
Mostly untight hose clamps or a hairline crack on the radiator drives side. Coolant will also leak from a faulty water pump
you have a leak in a hose or your radiator itself. Look for antifreeze dripping from under car while engine is running and hot enough for the fan to kick on.