Why Does Engine Coolant Decrease?

[KaiAnn]

Engine coolant decreases for the following reasons: 1. Leakage in the engine cooling system, causing the coolant to drain completely. In this case, you need to check for any leakage points in the cooling cycle, starting from the radiator to the cooling water circulation pump, then to the engine water inlet and outlet, coolant pipes, and finally the cooling row. 2. Thermal expansion and contraction. When the engine is cold, the coolant level may be below the minimum line, but after the engine runs for a while, it returns to the middle of the F/L mark. It is recommended to check before starting the engine. 3. Air retention in certain areas of the cooling system. After some time of circulation, the air is expelled, leading to a drop in coolant level.