Why does a bus scania overheat going up hill?

A Scania bus may overheat while going uphill due to increased engine load and demand for power, which can lead to higher temperatures if the cooling system is not functioning optimally. Factors such as low coolant levels, a malfunctioning thermostat, or a clogged radiator can exacerbate this issue. Additionally, prolonged climbing can hinder airflow to the engine, further contributing to overheating. Regular maintenance and monitoring of the cooling system are essential to prevent such occurrences.