With the onset of heat from drivers a new problem appears - overheating of the motor. This phenomenon may occur on any car. This is especially true at elevated air temperature and traffic jams. In this case, the consequences can be quite different: from an interrupted or failed trip to the overhaul of the power unit. Not rare overheating can entail a deformation of the head of the cylinder block or the "tap" piston in the cylinder. The vehicle in a normal technical condition is cooled independently. With a high speed of driving, this is due to the blowing of the radiator by the oncoming stream of the wind, and the cooling system fan is started in a slow motion. About this further in the article.

Coolant, which leads to the use of poor-quality coolant

Not rare the engine boiling occurs as a result of the use of poor-quality coolant or the use of antifreeze, not intended for this model of the car. Therefore, it is very important to monitor the manufacturer and quality of the coolant that you purchase for your vehicle. You should not climb the car on a water diet, since each vehicle "feeds" by a certain antifreeze. Remember, the water boils at a temperature of one hundred degrees, and a good antifreeze - at a temperature of 150 degrees Celsius.

Possible causes of boiling

The reasons for the booster of the power unit are many, consider the most common.

cooling fluid leak in the system

The depressurization of the cooling system is most often due to the wear of the pump sealing, weakening the tightening of the clamps, cracks in the hoses, radiator faults, the heater crane and other reasons. It may also arise due to the use of poor-quality cooling fluids and sharp temperature drops.

air traffic jams in the system

Another most common cause of the car overheating is the air (that is, the steam) cork in the cooling system hoses. To eliminate it, carefully skit all the hoses. If there are no traffic jams, look for a reason in any other place.

How to get high-quality antifreeze and antifreeze, to pay attention to when buying

When choosing antifreeze, it is desirable to give preference to the means that are recommended by your machine by the manufacturer, since it is precisely the manufacturer who knows from which metals the body of the power unit is made, and what is better to pour into the system to do not run it. In addition, there are still plastic, rubber and aluminum elements, which are also sufficiently picky to the composition of the toosol.

If you need to add antifreeze, you must know exactly what is covered in the system at the moment, otherwise there is a risk of making a dangerous "mix", which may entail serious problems. It is better to merge Tosol completely and pour a new one, it will be much cheaper than after saving to get problems with CO, raid and scale.

When buying antifreeze should be paid to the following brands: Total, Texaco, Shell. If your budget is limited, give preference to "our" manufacturers: BASF, Vamp, Sintec, Lukoil. Choosing a high-quality coolant, you should pay attention to its appearance. It is necessary to avoid fakes that are most easily determined by the following features:

• A sharp unpleasant smell.
• Too low cost.
• Poor-quality packaging.
• Sediment.
• Poor-quality printing on a label or error on it.
• There is no pH indicator. Its minimum value of 7.4-7.5. What the indicator is more, the better.

Car cooling system, purpose, device, principle

The purpose of the cooling system is cooling the elements of the motor, which are heated as a result of its operation. On the modern car, the cooling system, in addition to the main function, also performs other options such as:

1. Heats air in the air conditioning, ventilation and heating system.
2. Cool oil in the lubrication system.
3. Cools spent gases in the recirculation system.
4. Cool air in the turbocharging system.
5. Cools the working fluid into the automatic transmission.

Depending on the cooling method, there are such types of cooling systems: air (open type), liquid (closed type) and combined. On cars, the liquid cooling system was obtained at the most. It provides efficient and uniform cooling and is characterized by a smaller level of noise.

The design of the cooling system of diesel and gasoline engines is similar. The cooling system of the power unit includes a mass of components, in particular the coolant radiator, heater heat exchanger, oil radiator, centrifugal pump, radiator fan, thermostat and expansion tank. To adjust the system operation, controls are used.

Malfunctions in the cooling system, which threatens the car

The cooling system malfunctions entail a violation of the temperature regime, as a result of which engine overheating can occur. There are such cooling system malfunctions:

• Low level of coolant.
• Temperature indicator fault.
• Fault of the temperature sensor.
• Cleaning of the GBC and burning gaskets; Faults of nozzles (clogging, mechanical damage, disruption of fastening tightness).
• Cracks in a cylinder block or block cooling shirt.
• Fat fan malfunction.
• Thermostat faults.
• Malfunctions of the centrifugal pump (wear, tightness disorder, driving a drive).
• Faults of the radiator (disruption of tightness, contamination of the outer surface, clogging of the core).

Possible malfunctions in the cooling system

thermostat does not work, reasons how to eliminate

When problems with the thermostat, the power unit may overheat or not go to the operating temperature, remaining cold. To find out whether the thermostat is the cause of engine overheating, run the power unit and warm it up to the operating temperature. It should also be checked the temperature to which the upper liner of the thermostat is heated and the thermostat itself. If they remained cold, when the motor continues to heat up, it says about the thermostat breakdown.

There is another way to check the thermostat, removing it from the car: omit the thermostat into any capacity with water, gradually raising its temperature and controlling this process. When the water temperature reaches 78-85 degrees of Celsius, the valve of a normally working device will begin to be discharged. If this did not happen, then the thermostat is faulty.

Remember, the defective functioning of the thermostat can also cause the impossibility of warm up the motor to the operating temperature. In winter, it can fully deprive the owner of the possibility of starting its vehicle.

the radiator fan does not work, the reasons how to eliminate

Check the radiator fan is very simple, it must be directly connected to the battery. If the fan turns on, it means it is correct. But if he did not turn on, repair it or replace it.

scored radiator, reasons how to eliminate

You suspected a radiator in a malfunction, check how uniform it takes place. If it warms normally only in the upper part, and the lower department along with the breaker hose remains as cold, most likely, the reason lies in its contamination.

The cooling radiator is scored, this is checked as follows. The first sign is a muddy and dirty toosol. If it did not work out to be determined by Tosol, give a heated motor approximately 1500 revolutions. Then squeeze the inlet pipe, which comes from the engine to the radiator. He is on the mouth of the stone and will not get to be treated with his fingers. And the outlet is mild, it can be easily traced with your fingers. Sometimes it squeezes himself if it is sufficiently sharply and highly increase the speed on the hot engine.

Radiator tubes are able to create a serious fluid resistance, which passes through them, and precisely as a result of this, the pump pressure is raised at the inlet to the radiator. Then at the outlet of the nozzle will be simply plusing from the vacuum. You can check it on your car and on the other of the same brand, then compare the results. If the radiator was clogged, clean it with flushing.

To wash the radiator, it is necessary to wear cellophane on the intake and outlet nozzles. First pour two liters of water into the radiator. Put on it the lid and turn it down from top to bottom as quickly as possible. Now drain the water and fill the flushing (floor jar jar into two liters of water). Watch the radiator and let him stand out for five minutes. Then repeat the procedure. After that, it is necessary to all drain and rinse the radiator well.

If you have a copper radiator on your car, it is desirable using a soldering lamp, dumped up the upper and lower lid, and then survey a thin strip of metal without sharp faces.

Possible engine malfunctions that lead to boiling

transmission Mallings

Problems in the checkpoint can also lead to overheating of the power unit. For example, a non-relaxed manual brake, which entails a car tooling, an increase in the load on the motor and overheating. Parking brake can be twisted. And although the vehicle will slow down insignificantly, it is quite enough to overheat the engine in the heat.

over a car

It does not rarely, the engine is overheated as a result of too strong overloads of the power unit. For example, such situations appear with very slow driving on city traffic jams or country roads. So that this does not arise, it is necessary to give the engine short-term respite.

Tips Prof.

It is much easier to warn engine overheating than to fight with consequences. Some believe that overheating of the power unit occurs instantly. In fact, it is not. It can quickly warm up only a certain small local part of the engine. And then this overheating will entail an increase in temperature throughout the system. It acts like in the kettle. Initially, water boats on his bottom, and then after some time the whole kettle boils.

Therefore, the simplest and effective way to prevent overheating is constant temperature control over the sensor. Preferably at least once in 5 minutes to pay attention to the instruments. So you will see an increase in the temperature in the engine and can respond in a timely manner, without consequences.