What are the symptoms of high engine temperature?
2 Answers
An excessively high engine temperature manifests in the following ways:1. When the engine temperature is too high, the intake air temperature also rises, resulting in reduced actual air intake volume. This decreases the engine's volumetric efficiency, leading to diminished power and torque output, which manifests as insufficient engine power.2. At excessively high temperatures, the combustion chamber reaches extremely high temperatures that can easily reach gasoline's ignition point, prematurely igniting the air-fuel mixture and causing engine knocking. This creates severe engine impact and vibration, subjecting components to additional shock loads that may cause premature failure.3. When overheated, pistons undergo excessive thermal expansion, reducing or even eliminating the clearance between pistons and cylinder walls. This increases piston movement resistance and may even cause scoring damage to both pistons and cylinder walls.
Last time I was driving on mountain roads, I encountered an engine overheating situation. I clearly felt a lack of acceleration, and the car responded sluggishly when I pressed the throttle. Suddenly, a pungent burnt smell, like burning plastic, wafted into the cabin. When I looked down at the dashboard, I saw the temperature gauge needle had soared into the red warning zone, and the engine fault light also came on. After stopping, I opened the hood to check and could hear the coolant boiling and gurgling in the radiator, with white steam rising from the coolant reservoir. That was a lesson learned—now during hot weather, I pay extra attention to the cooling system, regularly checking the coolant level and fan operation. If you notice the temperature abnormally rising while driving, it's best to pull over immediately to let the engine cool down.
