What is the function of the engine coolant reservoir?

[OEmmanuel]

The function of the engine coolant reservoir is to facilitate the observation of whether the coolant is insufficient and to store the coolant. Here is more information about coolant: 1. The coolant in the car's cooling system not only prevents water from freezing but also reduces scale formation, wear on the water pump impeller, and improves heat dissipation capacity. 2. When the coolant temperature rises and its volume increases, the liquid pressure will push open the valve on the radiator, allowing the coolant or steam in the radiator to enter the reservoir through the steam connecting pipe. When the coolant temperature decreases, the pressure in the radiator drops, and the coolant flows back to the radiator through the intake valve on the radiator cap via the connecting pipe. 3. There is a steam outlet pipe at the top of the reservoir cover. If the steam temperature becomes too high, the steam can be discharged through the steam outlet pipe.