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Brief analysis on the blockage of the vent pipe of the expansion tank

(Summary description)First of all, when the engine is cold and filled with antifreeze, the air in the engine water jacket and radiator cannot be discharged immediately due to the blockage of the vent pipe, so that the antifreeze cannot fill the entire system.

Brief analysis on the blockage of the vent pipe of the expansion tank

(Summary description)First of all, when the engine is cold and filled with antifreeze, the air in the engine water jacket and radiator cannot be discharged immediately due to the blockage of the vent pipe, so that the antifreeze cannot fill the entire system.

Information

First of all, when the engine is cold and filled with antifreeze, the air in the engine water jacket and radiator cannot be discharged immediately due to the blockage of the vent pipe, so that the antifreeze cannot fill the entire system. It seems that the antifreeze in the expansion tank has been When it is fully filled, the engine water jacket and radiator are actually in a half-empty state, which causes the antifreeze to not circulate normally, and the engine temperature rises very rapidly. Often, the cooling system "opens the pot" and sprays water, but the antifreeze cannot be replenished. failure phenomenon.

Secondly, although the engine has been filled with antifreeze, the ventilation pipe is blocked during use, especially when the ventilation pipe connected to the front of the engine thermostat is blocked. During the engine operation process, as the temperature of the antifreeze gradually rises, It will cause a little vapor. If these vapors accumulate above the radiator, it will hinder the flow of antifreeze and affect the heat dissipation effect; if these vapors accumulate in front of the thermostat, the thermostat will be released from the antifreeze, and the main valve of the thermostat cannot follow. When the temperature of the antifreeze rises, it is opened immediately, and the large circulation of the antifreeze caused by the development and change of the air resistance can not be effectively done, so the engine often has a phenomenon that the temperature is too high. The accumulation of steam can also displace antifreeze, which develops into an expansion tank overflow condition.

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