There are many varied reasons that can make an engine overheat, but they all have in common three aspects. The three aspects which all engine overheat reasons have in common are that they make the heating system can not get rid of heat, they create a loss of coolant or they directly cause too much heat in the engine.
One first issue which might be the cause of an engine overheat is an issue with the radiator cap and the pressure it holds. If the radiator cap does not retain pressure correctly then coolant could boil and therefore the engine would overheat. Another factor might be caused by thermostat failures; it is recommendable that you check it.
The vehicle engine might also overheat due to coolant leaks such as those from the radiator, the hoses, the water pump, the freeze plugs or any others. Also, issues in the water pump could be the reason and therefore you should check it and change it in case it is required.
Some other factors by which the vehicle engine could overheat are issues in the exhaust system which you can found by checking vacuum readings, pipes and converter. Besides, you should also make sure that the radiator hose has not collapsed and the ignition timing is working correctly.
You should also inspect the electric cooling fan by making sure that the fan motor, the relay and temperature are appropriate or otherwise it could cause the engine to overheat. Apart from this, you should also check the radiator in case there are any debris in it as well as checking its hose in case it has gone bad.
See Also:HOW TO PREVENTING ENGINE OVERHEATING
It is also advised that you check the antifreeze concentration which should be 50/50 in order to be normal, otherwise it could make the car engine to overheat. If you do not find why your engine does overheat, you should ask a professional or an expert for advice. You should not try to fix this if you do not have the proper tools and general vehicle knowledge necessary for it.