What is the reason for the abnormal increase of water temperature in the water tank at idle speed?

1. When there is traffic jam or idling for a long time, the engine water temperature meter shows too high, the high-gear electronic fan works for too long, and the engine noise increases. The air conditioning fault is the most obvious in hot weather;

2. The air conditioner is turned on in hot weather, the idle speed is unstable, the speed fluctuates too much, the engine is weak when accelerating rapidly, and the engine has abnormal noise;

3. It is not good to start the car again after the hot car is turned off for ten minutes;

4. Sometimes the hot car will automatically turn off when driving;

5. When the car is cold, the air conditioning refrigeration temperature is very cold, and when the car is hot, the air conditioning refrigeration effect is not good, and the air conditioning system has a great * * * vibration buzz;

6. When the hot car is idling, the clutch of the air-conditioning compressor is frequently sucked off or even disconnected, resulting in that the air conditioner of the hot car cannot be cooled.

Solution:

1, don't turn off the fire immediately after boiling, but keep idling temporarily and try to cool down. Slow down first, then pull over, don't turn off the engine in a hurry.

2. Don't pour cold water on the engine during cooling, which may cause the engine block to burst due to sudden cooling. The correct way is to put on gloves, put a folded wet cloth on the water tank cover, gently unscrew a small crack in the water tank cover, and then add cold water or antifreeze after the water vapor is slowly discharged and the water tank pressure drops.

Extended data:

When the engine is running, if the accelerator pedal is completely released, the engine will be at idle speed. When adjusting the idle speed, the speed should not be high and low, otherwise it will cause early wear and tear to the engine, so it is best to adjust it in the automobile maintenance department.

Idle speed means that the engine runs with no load, and it only needs to overcome the friction resistance of its internal parts and does not output power to the outside. The lowest speed to maintain the stable operation of the engine is called idle speed, which is one of the five basic working conditions of the engine. The idle speed of an engine with good working performance is generally 550-800 rpm.

Idle speed can be adjusted by adjusting throttle opening and idling oil supply. Generally speaking, the minimum idle speed is the best when the engine does not shake in the idle speed range and the acceleration performance is good.

Baidu encyclopedia-idle speed