What are the causes of high temperature in a car engine?

[OAsher]

Causes of high temperature in a car engine include: 1. Fan motor not working or fan clutch failure; 2. Blocked or ruptured catalytic converter pipes; 3. Ruptured pipes in the cooling system; 4. Long-term use of the water pump leading to severe wear and part detachment; 5. Unstable pressure in the radiator cap causing spring loosening and improper sealing. Solutions for high engine temperature are: 1. Open the radiator cap, start the engine, and observe if there is any water circulation in the radiator; 2. Remove and inspect the thermostat; 3. Check if the radiator surface is blocked; 4. Inspect the fan belt to ensure proper tension.

[StOscar]

Last time I drove to the mountains for vacation, the engine suddenly gave a high-temperature warning, which really scared me. I immediately pulled over to check and found that the main cause was insufficient coolant, as some fluid had leaked due to aging hoses. This is what happens when there's a problem with the cooling system, like a clogged radiator or a malfunctioning fan. When the car is climbing steep slopes at high speed, the heavy load on the engine can also cause the temperature to spike. At the time, I checked the fan and found it wasn't spinning—probably a motor issue. High temperatures are extremely dangerous and can cause engine components to deform or even crack. I want to remind everyone to check the coolant level and fan before long trips, and clean any dirt off the radiator to prevent such incidents. Safety on the road comes first!

[CamillaLee]

As someone who has been maintaining my own car for years, I've found that engine overheating mostly stems from improper cooling system maintenance. For instance, last time I neglected to change the coolant, and the low water level led to poor heat dissipation. The fan bearings rusted and seized, exacerbating the problem. Water pump failures are also common—it circulates the coolant, and once it gets stuck, the temperature spikes. During long highway drives or using the AC on hot days, the engine is under greater load and more prone to overheating. I recommend regularly checking the radiator and fan, cleaning the radiator fins to prevent dirt buildup, and keeping an eye on the dashboard warning lights. Simple DIY steps can prevent overheating, saving on tow truck fees and protecting the engine's lifespan, giving peace of mind even on mountain roads.

[JoannaLee]

Having driven trucks for over thirty years, my long-haul experience tells me that engine overheating is most often caused by coolant leaks or a clogged radiator. Overloading when climbing steep slopes in hot weather can cause the system fan to stall or the motor to burn out. Insufficient airflow is also a hazard—when the cooling vents are clogged with dust or leaves, cooling efficiency drops. Once overheating occurs, it can destroy the engine, so it's crucial to stop and inspect immediately. I've developed the habit of regularly checking coolant levels and fan operation to address small issues early and avoid major breakdowns on the road.