What effect does scale have on a coolant system?

Scale buildup in a coolant system primarily affects the heat transfer properties of the system. When scale accumulates on the surfaces of the water jackets and radiator, it creates an additional layer between the coolant and the metal surfaces. This additional layer acts as an insulator, impeding the direct contact between the coolant and the surfaces designed to lose heat.

As a result, the efficiency of heat transfer is decreased, meaning that the system cannot effectively dissipate heat. This can lead to overheating and reduced performance of the engine or related systems. Therefore, recognizing the role of scale in hindering heat transfer is essential for maintaining the overall efficiency and reliability of the coolant system.