What is the correct coolant level in the overflow reservoir?

The appropriate coolant level in the overflow reservoir is ideally maintained at the maximum level to ensure there is enough coolant available for optimal engine performance and to prevent overheating. However, the correct answer indicates that the coolant should be at a level halfway between the maximum and minimum thresholds.

Maintaining the coolant level at this midpoint ensures that there is adequate coolant available while preventing overflow, which can occur if the reservoir is filled above the maximum level. Additionally, having coolant at this level allows for some expansion without leading to spillage, thus ensuring proper functioning of the cooling system under varying engine temperatures.

Keeping the coolant in this range also enables the operator to monitor coolant levels effectively, making it easier to identify potential leaks or other issues that may affect the overall performance of the cooling system. This understanding is crucial, especially in applications like mobile water supply, where optimal equipment functionality is essential.