So, how to exhaust the air in the car water tank? First, we will warm up the vehicle for 5- 10 minutes after the cooling fan rotates, and then the coolant will drop a little. After filling the coolant, cover the water tank. But this method can only cure the symptoms, not the root cause. If you want to completely eradicate the air in the water tank, you must do the correct operation when changing the coolant next time. Here are the operating steps.
Step 1: Open the engine compartment in a cold state and check whether the coolant is sufficient. The maximum and minimum upper and lower limits are marked on the side of the coolant tank. When the car is cold, the liquid level is lower than the lower limit, and the addition amount is subject to the scale on the pot side.
Step 2, check the connecting pipes, especially the five-way pipe (named after the five interfaces connecting various parts) for cracks and leaks;
Step 3, drain the old antifreeze, clean the liquid passage with clear water, let the clear water continuously flow through the engine cooling system, then idle for 3 to 5 minutes, let the water circulate, and continue to inject the clear water until the flowing water is clean;
Step 4: In order to make the antifreeze flow into the water tank quickly, after draining for about 1 hour, add new antifreeze through the water pipe of the water tank (radiator), then add a bucket of antifreeze into the antifreeze tank until the antifreeze tank is almost full, and ignite for about 10 minute. At this time, the liquid level of the cooling system drops because some air is removed, and then antifreeze is added, and the capacity has two scales.
Related reading: How often do you add water to the car water tank? What should you do if the car tank is out of water (click jump)
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