The function of water blocking on the car engine body is to prevent the engine from freezing and breaking the body, and to protect the engine. Excessive water temperature is very harmful to the engine. It may cause the cylinder head to warp and deform, or cause the piston to expand and become stuck. High water temperature due to lack of antifreeze is the least likely to be discovered. Usually car owners will not take the initiative to open the engine compartment to see if there is a lack of antifreeze
There are oil passages and water passages inside the engine block, which are cast. At this time, it cannot be formed in one piece, and various oil and water channels need to be processed later, especially the sealing water plugs of the water channels, due to long-term contact with antifreeze.
The mainstream ethylene glycol antifreeze on the market will form acidic substances at high temperatures. If the preservative content in the antifreeze does not meet the standard, it will not be able to neutralize the acidic substances, causing the antifreeze to corrode and cause water blockage.
Extended information:
The functions of water blockage in the engine body are as follows:
Lack of antifreeze in the cooling system is the most common reason why the heater air is not hot. When designing the engine cooling system, engineers will give priority to engine heat dissipation, and then the normal operation of the heater. When the coolant is insufficient, the coolant will be given priority to circulate in the engine. At this time, there will be no "water" in the warm air circulation pipe.
Most of the water in the heater tank is air, so the air conditioner warm air is naturally not hot at this time. After replenishing the antifreeze, the heater water tank is filled with hot coolant, and the heater will naturally heat up.
Ifeng.com-Use coolant correctly! Do a good job in car electronic control maintenance
Ifeng.com-If the car air conditioner heater fails in winter? It turns out they are the culprit