Q: Causes of overheating 2012 Hyundai Accent

Hi there - overheating is caused by the inability of the cooling system to deal with the heat generated by the engine. The engine itself can overheat from a stuck (closed) thermostat, or a blown head gasket (which effectively "superheats" the coolant). The water pump transfers heat to the radiator - if it’s working properly - and airflow, either from road speed, or the auxilliary fan, transfers that heat out of the radiator into the air. If the radiator is clogged, there is too little coolant flow from the water pump, or the auxilliary fan doesn’t come on in stop-and-go driving, the whole system can’t get rid of the heat, and overheating occurs. This all depends on having a completely full coolant system (no air bubbles), and clean internal surfaces that are transferring heat effectively(no corrosion or sealants). I recommend an overheating inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.