What is the problem when all the coolant leaks?

[DiRosalie]

The main issue causing complete coolant leakage is a crack in the engine block. Below are the relevant explanations: 1. Natural loss: Various fluids in a car experience natural loss. Since coolant is responsible for cooling the car engine and is often in a high-temperature state, it is normal for coolant to lose about 10%-36% per year. According to the technical requirements of NB/SH/T0521-2010 "Ethylene Glycol and Propylene Glycol Engine Coolants" issued by the National Energy Administration, the boiling point of a 50% volume fraction of coolant is above 100°C, and the loss is mainly due to natural evaporation. Without replacement, the annual loss ranges between 10%-36%. 2. Coolant entering the cylinder for combustion: For example, cracks in the engine block, cylinder head gasket burning or corrosion deformation, etc. In such cases, pulling out the dipstick to check if the engine oil shows emulsification. The engine block has oil and water channels. Once the cylinder head gasket is damaged, the water channel cannot be sealed, resulting in complete coolant leakage.