Is it necessary to start the engine when using a circulation machine to replace coolant?

[DanielFitz]

When using a circulation machine to replace coolant, you should not start the engine. Functions of coolant: Coolant is a special additive-containing liquid primarily used in liquid-cooled engine cooling systems. It provides excellent performance in preventing freezing in winter, boiling in summer, and resisting scale and corrosion throughout the year. Composition of coolant: The main components of coolant are: 50% purified water, 40% methanol, and 10% other substances. Types of coolant: Coolant is generally classified into three types: ethanol-water type, glycerol-water type, and ethylene glycol-water type. Coolant should not be mixed: It is necessary to use the same brand of coolant. Different brands may have varying production formulas, and mixing them could lead to chemical reactions between additives, rendering them ineffective. How to choose coolant: The basic indicators for coolant are freezing point and boiling point. Available freezing points on the market include -15°C, -25°C, -30°C, -40°C, etc. Generally, it is advisable to choose a coolant with a freezing point at least 10°C lower than the lowest temperature in your region.