The BMW 5 Series electronic water pump is in the engine compartment. When the engine is cooling, open the water return bottle cover. Turn on the ignition switch, turn on the air-conditioning warm air mode, adjust the air-conditioning temperature to the highest level, adjust the wind speed to the minimum, press the accelerator pedal to the extreme position and hold it for 10 seconds, the engine will not start. The exhaust process has been started by pressing the accelerator pedal and lasts for about 12 minutes. Then the liquid level in the coolant expansion tank is replenished to the maximum, the water bottle cap is closed, and the exhaust is completed.
If the air inside the electronic water pump cannot be properly removed, it is easy to cause the vehicle water temperature to be too high. This is because there is too much air inside the cooling system and the coolant cannot circulate effectively.
In addition, the air expands due to heat and generates excessive pressure. If the water tank cover cannot release the pressure in time, it may easily lead to serious failures such as water pipes or even water tank bursts. Therefore, it is crucial to drain the air after replacing the antifreeze. .
During the exhaust process, you need to rely on the battery. If the battery is almost at the end of its service life, it is best to connect an external charger to the battery at the beginning. Exhaust must be carried out when the engine is cold. It is strictly forbidden to open the water tank cover or drain valve when the antifreeze temperature is very high to avoid burns.
There are two ways to exhaust air from the BMW 5 Series electronic water pump:
1. Turn the ignition switch to 2nd gear, adjust the air conditioning fan to the lowest, and then adjust the temperature to the maximum;
2. Turn on the low beam headlights, press the accelerator pedal for ten seconds and then hear the sound of the auxiliary kettle draining water.
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