need find out where you are losing antifreeze = look for leaks at radiator hoses etc first, then intake manifold top side of engine along sides of engine as well. Be careful if engine is hot .then lastly check you engine oil in case there is an internal antifreeze leak due to faulty intake manifold or head gasket. if not found have a pressure test done on the cooling system
this could be due to defective or clogged thermostat
Thermostat regulator is malfunctioning, water pump pulley could be bad, gas bubble in radiator hose.
it could be the water pump or a blown head gasket
check the water level, if its okay then you probably need a thermostat
Change your thermostat.
water pump
Be sure the thermostat is not installed backwards.
Have you had the rad. checked ?
It could be your serpentine belt, thermostat or water pump.
When the engine overheats because thermostat won't open to allow the water to flow and cool!
sounds to me like the thermostat has gone ... or possibly water pump failure (eg at 100K miles) or an oil problem. First check the coolant level. If it's at the proper level it is probably the thermostat It could be the thermostat, water pump, or even the radiator fan switch. If it only overheats when the car is driven at low speeds or in heavy traffic it might be the fan switch. If it overheats even when moving at a constant high rate of speed (over 45mph or so) then it is probably the water pump or thermostat.
It could be the thermostat. Open up the radiator cap when it is hot and see if the water is flowing in the radiator. If it is not then it may be a thermostat.