* Coolant leak: A coolant leak can also cause the engine to run hot. Look for any leaks in the hoses, radiator, or water pump.
* Faulty thermostat: A faulty thermostat can prevent the coolant from flowing properly through the engine. Test the thermostat by placing it in a pot of boiling water. If the thermostat does not open, it is faulty and should be replaced.
* Radiator blockage: A blockage in the radiator can prevent the coolant from flowing properly through the engine. Check the radiator for any obstructions, such as leaves or debris.
* Faulty water pump: A faulty water pump will not be able to circulate the coolant properly through the engine. Check the water pump for any leaks or damage.
* Head gasket failure: A head gasket failure can cause the coolant to leak into the combustion chambers. This can cause the engine to overheat and run rough. If you suspect a head gasket failure, have the engine inspected by a qualified mechanic.