1, thermostat failure: the working quality of automobile cooling system has a great relationship with the engine water temperature, including radiator water tank, cooling fan, water pump, thermostat, water jacket, water pipe, etc. Problems in the cooling system will mostly expose the engine to high temperature risks, such as the cooling fan stops working and the water pump fails, which makes the cooling water (antifreeze) unable to dissipate heat normally, thus raising the engine temperature and making the cooling water "boil". However, the failure of the "thermostat" may warm the water.
2. Water temperature sensor fault: the engine water temperature can't go up, which may be caused by the water temperature sensor fault (the water temperature sensor interrupts the instrument panel temperature signal). The failure of the water temperature sensor may cause the pointer of the water temperature meter to fail to work normally, resulting in the illusion that the water temperature cannot go up. Even if the engine water temperature is high, the water thermometer may not respond.
3. The cooling fan keeps turning: the engine is neither too cold nor too hot, so the heat dissipation adjustment is very important. The cooling fan is an important part of the engine heat dissipation adjustment. Under normal circumstances, when the water temperature of the engine reaches a certain level (usually turned on above 90℃, depending on the specific vehicle type), the cooling fan will automatically turn on, with the main purpose of accelerating heat dissipation and preventing the engine from overheating. However, in the cold state, the cooling fan is still running, which is redundant and is not conducive to the rapid warm-up of the engine, which increases fuel consumption in vain.
Function introduction of automobile water tank
1. Water tank is an important part of water-cooled engine. As an important part of the cooling circuit of water-cooled engine, it can absorb the heat of the cylinder block and prevent the engine from overheating. Because of the large specific heat capacity of water, the temperature of the engine did not rise much after absorbing the heat of the cylinder block. Therefore, the heat of the engine passes through the liquid loop of cooling water, and water is used as the heat carrier to conduct heat, and then the heat is dissipated by convection through a large area of fins, so as to maintain the appropriate working temperature of the engine.
When the water in the water tank turns red, it is caused by water rust. Do not add ordinary water unless there are special circumstances. Because ordinary water is salty, alkaline and acidic. And the lubrication protection function of the antifreeze oil tank. Choose antifreeze with different ph values according to different water tank materials.