a bad water pump or thermostat
You can also have an internal leak as in a leaking head gasket. Have this repaired ASAP, or you may do serious damage to the engine.
check radiator for leaks
It's venting the wrong way. Either it's installed wrong, or it's broken.
Have you checked the thermostat... Sound like a blocked radiator .................PS
check your coolent fill cap
If it is very hot outside (you don`t say) and it is cooling (you don`t say), nothing is wrong and it is properly sized.
sounds like the ignition module is failing in the heat.
You may need anew thermostat or the fan has stopped working.
The engine runs fast, won't idle down, and many times the exhaust manifolds will glow red hot from the lean mixture.
Common signs of hot water pipe leaks in a residential plumbing system include water stains on walls or ceilings, reduced water pressure, and unexplained increases in water bills. Solutions for hot water pipe leaks may involve locating and repairing the leak, replacing damaged pipes, or insulating pipes to prevent future leaks. It is important to address hot water pipe leaks promptly to prevent water damage and potential mold growth.
One possible cause could be too much air in the air / gas mixture. Check rubber hoses from the carburetor for leaks or visible cracks, or adjust the carburetor screws for gas and air mixture. Another possibility is that you are using a wrong kind of spark plug that is too hot for the engine. Then it will act like a glow plug once the engine runs hot, and ignite the gas and air mixture at the wrong time. Check for the correct spark plug, clean the old one or replace if it is the wrong kind or looks dirty.
Answer == Rebuild/replace the engine.
It is overheating. Possible causes are thermostat stuck closed, defective water pump, cooling fan not working, clogged radiator, and more. STOP drivng this car until you get this fixed. You are going to ruin this engine if you have not already done so.