When the engine began to run cold car, the water inlet pipe of the water tank water inlet pipe, the main valve can not be closed, when the engine cooling water temperature more than 70 degrees, the water inlet pipe of the water tank of the water inlet pipe no cooling water outflow, the thermostat main valve can not normally open, then it needs to be repaired. Thermostat inspection can be carried out in the car, the method is as follows:

After starting the engine check: open the radiator cap, if the radiator cooling horizontal static, it indicates that the thermostat work properly. Otherwise, it means that the thermostat disorders. This is because, in the water temperature below 70 degrees Celsius, thermostat expansion tube is in a state of contraction, the main valve is closed; when the water temperature is higher than 80 degrees Celsius, the expansion tube expansion, the main valve gradually open, radiator inner circulating water began to flow. When the water temperature meter indicates that the temperature is warm, the water temperature of the radiator inlet pipe of the heat radiator is warm, and the temperature of the water temperature is warm, the temperature of the main valve of the thermostat is closed, so that the cooling water is too early to cycle.

After the water temperature is increased, the engine works in the early stage, the water temperature rises quickly, when the water temperature meter indicates that after 80, the temperature rising speed slows down, it indicates that the thermostat is working normally. Conversely, if the water temperature has been rising very fast, when the internal pressure to a certain extent, the boiling water suddenly overflow, it indicates that the main valve is stuck, suddenly open.

In table indicating 70 DEG C to 80 DEG C temperature, open the radiator and radiator drain switch cover, feel the temperature of the water, if they are hot shows thermostat work properly; if the radiator water outlet water temperature is low, and radiator water chamber inlet pipe or water little anhydrous outflow that thermostat main valve can not be opened.

A thermostat or close the thermostat should be removed to clean or repair, do not have to use.

Inspection of thermostat

According to information, the safety life of the wax thermostat is generally 50000km car mileage, so the requirements in accordance with the regular replacement of its safety life.

Thermostat inspection methods in the temperature can be debugged thermostatic heating equipment to check the thermostat main valve opening temperature, fully open temperature and lift, in which there is not consistent with the specification, the thermostat should be replaced. Such as Santana JV engine thermostat, the main valve opening temperature of 87 DEG C plus or minus 2 degrees, the full temperature is 102 degrees plus or minus 3 DEG C, open up process >7mm.