What is the function of the coolant reservoir?
1 Answers
The engine cooling system is equipped with a coolant reservoir, the main purpose of which is to visually check if the coolant is insufficient and to store coolant. The coolant in the car's cooling system is a type of long-lasting antifreeze and anti-rust coolant. It not only prevents water from freezing but also reduces scale formation, wear on the water pump impeller, and enhances heat dissipation capacity. Below is a detailed introduction: 1. When the coolant temperature rises and its volume expands, the liquid pressure will push open the valve on the radiator, allowing the coolant or steam from the radiator to enter the reservoir through the steam connecting pipe. When the coolant temperature decreases, the pressure inside the radiator drops, and the coolant flows back to the radiator through the intake valve on the radiator cap via the connecting pipe. Additionally, the reservoir has a steam vent pipe at the top cover. If the steam pressure becomes too high, the steam can be released through this vent pipe. When the coolant level in the reservoir drops to the lower mark, it should be replenished promptly up to the upper mark. 2. The coolant level should be checked when the engine is cold. The level should always be between the minimum (MIN) and maximum (MAX) marks on the reservoir. The antifreeze content in the coolant should ensure it remains liquid at low temperatures, and the coolant should also possess anti-corrosion properties and high-temperature stability. To maintain the coolant's performance, it should be replaced every two years, preferably at the beginning of the severe cold season. When replacing the coolant while the engine is hot, wait for 15 minutes after shutdown or until the temperature drops below 100°C. Protect your hands with a cloth and slowly loosen the radiator cap to avoid burns. If more than 1L of coolant needs to be replenished, it indicates significant coolant loss, and the vehicle's cooling circulation system should be inspected.
