What should I do if the water temperature of Volkswagen Jetta engine is high?

1, insufficient coolant or coolant leakage. Solution: just replenish the coolant, find out the leakage point, deal with the leakage point and replenish the coolant;

2. The outer surface of the water tank is dirty or the inside is dirty. When the outer surface of the water tank is dirty or blocked internally, it will affect the heat dissipation of the water tank or the poor circulation of coolant. Solution: clean the water tank when the external surface of the water tank is dirty, and it is recommended to replace the water tank with a new one when the inside of the water tank is dirty and blocked;

The thermostat is broken. If the thermostat is closed when it is damaged, the coolant in the engine is in a small circulation, which makes the coolant in the water tank unable to participate in circulating heat dissipation, resulting in a higher water temperature when the vehicle is idling or driving at a low speed. The faster the vehicle speed, the higher the water temperature. Solution: It is suggested to replace the new thermostat;

The water pump is damaged. Water pump is the power source of coolant circulation. If the water pump is damaged, the coolant can't circulate to dissipate heat, resulting in high water temperature. Solution: It is recommended to replace the new water pump;

5. Cylinder gasket is damaged. The engine is short of coolant for a long time or the vehicle runs continuously under the condition of high water temperature, which leads to the damage of cylinder gasket. Another situation is that the cylinder head is corroded and the cylinder gasket is produced due to the long-term water addition of the vehicle. Solution: It is recommended to replace the cylinder gasket with a new one;

6. The temperature sensor is damaged. The temperature sensor is damaged and can't work normally, which causes the water temperature in the car to rise. Solution: Need to go to 4s shop for maintenance;

7. Loosen the fan belt. The loosening of the fan belt will slow down the fan speed and wind speed, thus increasing the water temperature in the car. Solution: Replace the fan belt;

8. Failure to close the throttle of the engine will cause the engine exhaust pipe to be blocked. If the exhaust pipe is blocked, the high-temperature gas in the car cannot be discharged normally, which will lead to the increase of the water temperature in the car. Solution: It is necessary to clean up the blockage of the exhaust pipe.