What Causes an Engine to Overheat?

[DeGeorge]

What causes an engine to overheat is as follows: 1. Insufficient coolant. Prolonged water circulation during engine operation can gradually deplete the coolant in the engine's cooling system, leading to a shortage of water in the radiator. If the owner fails to promptly inspect, detect, and replenish the coolant, it can easily result in engine overheating. 2. Radiator leakage. A broken or improperly connected radiator hose can cause leakage, which impedes water circulation and, in severe cases, may cause the engine to 'boil over'. 3. Cooling fan malfunction. Damage to the cooling fan or a short circuit in the wiring can prevent the fan from operating or cause it to rotate too slowly, preventing the engine's heat from dissipating and naturally raising the engine's temperature. 4. Thermostat failure. The thermostat controls the flow path of the coolant. If it becomes stuck or fails, the engine's large and small circulation will inevitably be affected, making it impossible to effectively dissipate the engine's heat. 5. Water pump failure. If the water pump malfunctions, the water that conducts heat in the engine cannot circulate and renew in time. After starting the engine, the water temperature will rise rapidly, and the water temperature warning light on the dashboard will illuminate. 6. Exhaust issues. A blocked catalytic converter or a broken pipe can obstruct the engine's exhaust, leading to engine overheating.