2. Most cars are using water-cooled engines, which rely on the continuous circulation of coolant in the engine to dissipate heat.
3. The coolant of water-cooled engine has two circulation paths in the engine, one is large circulation and the other is small circulation.
When the engine was just started, the temperature of the engine was relatively low. At this time, the coolant will circulate in a small range, which is beneficial to the rapid warming-up of the engine. The coolant will not pass through the radiator tank when circulating in a small range.
5. When the engine reaches the normal working temperature, the coolant will circulate greatly, which can keep the engine in a reasonable temperature range. When the cooling liquid circulates, the cooling liquid will dissipate heat through the cooling water tank.
6. If the coolant freezes, it will damage the water tank. When the liquid freezes, its volume will become larger, which will lead to the deformation of the water tank. So be sure to check the freezing point of coolant before winter. If the freezing point is too high, you need to change the coolant.