What is a common sign that indicates an engine may be overheating?

Steam from the hood is a common and clear indicator that an engine may be overheating. When the engine reaches an excessive temperature due to coolant loss, a malfunctioning thermostat, or other cooling system failures, it can cause the coolant to boil. As a result, steam may escape from the cooling system, often found near the engine or coming from the hood of the vehicle. Observing steam can alert a driver to a potentially serious issue, prompting the need for immediate attention to prevent further damage to the engine.

In contrast, low fuel levels could lead to issues with engine performance, but they do not directly signify overheating. Steering wheel vibrations are typically related to wheel and tire issues, such as an unbalanced tire or misaligned suspension components, rather than engine temperature. Excessive exhaust smoke can indicate various problems, like burning oil or coolant; however, it does not specifically indicate that the engine is overheating in the same clear way that steam does. Steam is a direct consequence of overheating in the cooling system.