Chelseaoverheat

So I bought a 99 Honda civic lx an I rode it for like three days after I bought it an it's starts running hot so I changed radiator an thermostat an thermostat sensor for the fan now I don't understand y its still running hot I bought the fail safe thermostat for it not just the regular do yall think its air bubbles the water pump was changed when the new engine was put in could need to change the water pump to be safe