Which of the following is a common symptom of engine overheating?

• A. Excessive steam from the radiator or coolant reservoir
• B. Increased fuel efficiency
• C. Improved acceleration
• D. Quiet engine noise

Answer: (A)

Excessive steam from the radiator or coolant reservoir is a common symptom of engine overheating. When an engine runs too hot, the coolant can boil, leading to the production of steam. This steam may escape from the radiator or the overflow reservoir, indicating that the engine is unable to dissipate heat effectively. This condition can arise from various issues, such as a failing thermostat, a blocked radiator, or a leak in the cooling system.

In contrast, increased fuel efficiency, improved acceleration, and quiet engine noise are not symptoms of overheating. Typically, an engine that is overheating will suffer from poor performance and may lead to increased fuel consumption, reduced acceleration due to lack of power, and unusual or loud engine noise due to potential internal damage or strain on components. Therefore, the presence of excessive steam is a significant indicator that should prompt immediate attention to the engine and cooling system.