Why does the engine get very hot after driving for a while?
2 Answers
The reasons for the engine getting very hot after driving include severe coolant deficiency, water pump failure, and cooling fan malfunction. Below are the relevant explanations: Severe coolant deficiency: If the owner fails to promptly inspect and replenish the coolant, it can easily lead to engine overheating. If the engine gets hot after just a short drive, it is likely not just a minor coolant shortage but possibly due to a leak in the radiator pipes causing severe coolant deficiency. It is recommended to check the coolant. Water pump failure: When the water pump fails, the water that conducts heat away from the engine cannot circulate and renew in time. After driving for a while, the water temperature will rise rapidly, and the water temperature warning light on the dashboard will illuminate. It is recommended to replace the water pump. Cooling fan malfunction: If the cooling fan is damaged or a short circuit causes the fan to malfunction or rotate slowly, the engine's heat cannot be dissipated. This leads to an increase in engine temperature, and opening the engine compartment will naturally reveal significant heat. For other cooling fans connected by belts, check and adjust the belt tension to ensure proper fan speed.
I've also encountered the issue of an overheated engine while driving. One time during summer on the highway, I could feel hot air rising from the hood. There are actually many possible causes, with the most common being a malfunction in the cooling system—like a coolant leak from the radiator leading to insufficient coolant levels, or a broken water pump preventing proper water circulation. Another issue could be the fan not working, especially in older cars where the belt might be loose or a fuse blown. Additionally, low engine oil increases friction causing heat buildup, and a faulty thermostat can prevent water from circulating out. Hot weather or running the AC puts extra load on the fan, making overheating more likely. Safety first—if the engine temperature warning light comes on, don't turn off the engine immediately. Slowly pull over and let the engine idle for a while before turning off the ignition. This problem shouldn't be delayed; get it checked and repaired as soon as possible to prevent engine damage. It's recommended to have a professional shop inspect the coolant level, hoses, and electric fan system.
