How to expel air from the engine cooling system

There are several reasons why the engine warms up after a cold start. We'll talk about one of them in this article. Often in the cooling system of the engine appears an air plug, which prevents the normal operation of the motor and contributes to the fact that the engine overheats. Therefore, you need to know how to expel air from the cooling system.

Preparation for work execution

Before you start to bleed the engine cooling system (SOD), you need to prepare. To do this, you need to put the car on a flat surface, for a more comfortable work. Also, before you start the removal of air from the cooling system, you need to acquire an instrument. As a rule, you need a crosspoint screwdriver, a pair of keys to remove the yoke.

It must be remembered that the work is done on a cold machine, so after a stop, it takes 10 minutes to wait. You can not climb under the hood of a car with a starter motor. Remove the cover of the expansion tank, you can do it by hand. Then loosen and lower the water pipe clamp. Since the coolant is fed through the engine to the engine, care must be taken not to damage the branch pipe. Now you can go directly to the removal of the airlock.

How to expel air from the cooling system

Despite the fact that all the work will take about 10-15 minutes, the service for this will take a decent amount, and in fact it will not be difficult to do it yourself. So, the first thing to do is to slightly move the yoke. Then air will come out of the nozzle, it can be heard by hissing. After the air stopper is removed, the coolant will flow out of the tube (antifreeze), this indicates that it is time to return the collar to its place.

It is worth noting that it is advisable to check the entire cooling system for leaks during these operations. Now, when the pipe is in its place and the clamp is tightened tightly, it is necessary to fill the expansion tank with antifreeze to the max level, it can be a little less, the main thing is that the amount of liquid is more than the minimum allowed. Just check the heater. If the air circulation is normal and the flow is warm, then there are no air jams, and you have completely coped with the task.

Air bleeding from the cooling system: method 2

This method is suitable for car owners with an engine capacity of 1.6 liters. In all cases, air accumulates at the highest point, in our case it is the throttle assembly. Therefore, it is desirable to remove the air plug from there. To do this, you need to remove the plastic cover that is on the engine, and then turn off the lid to fill the oil. Then it is necessary to completely remove the cover, it is installed on special rubber seals.

The next step is to close the oil filler cap. Then we find the hose of the throttle assembly. We loosen the clamp and remove it. After that, blow into the branch pipe until all the air is exhausted and the antifreeze runs off. Then quickly insert the hose back, you need to ensure that there is no air. We test the heater and rejoice at the result. Do not forget to put the overlay on the engine.

How to avoid getting air while replacing the coolant

So, not everyone knows that in most cases, air jams are formed directly during the replacement of the cooling liquid. To prevent this from happening, it is necessary to loosen the clamp and disconnect the coolant supply hose from the union. But this is only suitable if you have an injection car. In the case of a carburetor, disconnect the coolant supply hose from the carburettor nozzle.

After that, you can fill the expansion tank with a working fluid. Fill up to max. If there is none, then it is possible to pour until the coolant reaches the upper edge of the tank attachment. After that, the lid is tightly closed.

Also it is necessary to connect the hoses that we got before filling the coolant into the system. In the reverse order we perform the connection, after that we start the engine and warm it up to the operating temperature (green field on the sensor). At this time, the fan turns on. We muffle the engine and check the coolant level, if it fell a little, it's okay, just the liquid was pumped through the system. You just need to top up the coolant.

What you should always remember

Many forget about elementary inspections of the cooling system for defects (leaks). If you regularly look under the hood, then air congestion can be avoided. In addition, it is easy to remove air from the cooling system, so do not go to the service. Sometimes this can be done as follows. We drive the front wheels of the car on a small hill. In this position, at the engine speed of 2000-3000, we stand a couple of minutes. As a rule, after this the cork disappears. But if this did not help, then we use the methods described above.

It should always be remembered that a clean radiator is the key to ensuring that no air is released from the cooling system. The same applies to the regular flushing of the cooling system. Washing can be done with ordinary water or special detergents. Some drivers use Coca-cola, Sprite drinks.

A few words in conclusion

Today, many car enthusiasts are interested in the answer to the question of how to expel air from the cooling system, but, as noted above, the best means is timely prevention and careful maintenance of the car's components. Sometimes it's all a blame for a banal leak, it's easy enough to detect it with an ultraviolet glow, which, in fact, is used.

Another reason for the appearance of air congestion is that a poor-quality coolant is used. It does not perform its work 100% efficiently and contributes to clogging up the channels. Sometimes it is for this simple reason that there is a need to learn how to expel air from the cooling system correctly. In some cases, it makes sense to install a special filter that will normally work even fluids of quality below average. But it's cheaper still to buy a better quality coolant than the filter itself. Moreover, it will have to be changed every 3000-5000 kilometers.