What is the most common cause of engine overheating?

The most common cause of engine overheating is often insufficient coolant levels. When the coolant level is too low, the engine cannot maintain the necessary temperature, as it relies on the coolant to absorb heat and dissipate it through the radiator. Without enough coolant, the engine can overheat rapidly during operation, potentially leading to serious damage or failure.

Insufficient coolant could result from leaks in the cooling system, a failing water pump, or neglecting to check or replace coolant as needed. Each of these issues can prevent the engine from effectively regulating its temperature, leading to overheating.

While factors like a faulty thermostat or lack of proper lubrication can contribute to overheating, they tend to be less common overall compared to the direct impact of insufficient coolant levels. Understanding the importance of maintaining proper coolant levels is crucial for preventing engine overheating and ensuring the longevity of the engine.