Even novice drivers tend to understand that the cooling system - the thing is not just important, but fundamental to the work of any internal combustion engine. It is now almost never used air cooling - power and speed increase, and cooling air flow in this case is inefficient. Another thing the liquid - it has a huge capacity and can take very large amounts of heat from the hottest parts of the motor. On a powerful sports cars are often cool and engine oil, working in very difficult conditions - is ahead of the oil cooler. Oil is also involved in the cooling, although to a much lesser extent. Although now there are curious pattern like on a motor 2,0 T Opel Insignia - additional oil jets wash the inner surface of the piston. Overheating of the motor, cause problems with the cooling system could damage it for a few minutes, and failure can be so great that the power plant will simply have to change. Truncations of the rod, changing the geometry of the cylinder heads - all "in this series." Run a few hundred thousand miles for the engine is preferred. Maybe someone else remembers how our craftsmen with AvtoVAZ of 1,3 l engine, developed by Porsche, produced polutoralitrovy unit and what came of it. Has increased the diameter of the cylinder, respectively, cavity cooling between the cylinders had to be abolished - not fit. That's where the problems started. Significantly reduced resource powertrains, pistons grab near the TDC. Over time, solved the problem, but had to sweat. M 20 engines, BMW had a very long cylinder head. The slightest overheating - geometry change - change. Let us dwell on the most common failures and recommendations for their elimination. Many people probably have seen on a lovely hot day on the roadside or in the middle of the road are cars, mostly to domestic production, with a pool of cooling liquid under the engine compartment. Typically, such products suffer from AvtoVAZ. Why? About this a lot said and written, but still I repeat once again - this is important. The inclusion of the fan sensor located in the radiator. Inside - a thermocouple. When heated, the sensor housing to a certain temperature thermocouple is triggered by closing the circuit the fan. Unfortunately, sensors fan of domestic production is not very good quality, so there are similar problems. When buying a domestic car is recommended to replace the fan sensor on imports. If you're already standing in the middle of the road with overheated engine, you can do: throw connector from the sensor the fan and close the circuit with a piece of wire, unbent paper clip ... anything. The fan will run continuously. In this mode, you can get to the house. However, you can ride and a week or two until the electrical fan is not worn out. With proper thermostat damage to the engine will not. On the other hand, faster and easier to change kopek sensor than the mess afterwards with replacement parts not cheap. Another possibility is "boil" is in the thermostat malfunction. Again I must say that these things happen for some reason only with domestic machines. As a rule, cars thermostat, developed its resources, a wedge in the open position, in the summer nestrashno. We've always vice versa. In such a situation to get to the house can also try to include "stove" in full. Yes, it's hot and what to do? Do not leave the car in the middle of the road? However, you can call the tow truck - who like more. How do I know that trouble is guilty of exactly the thermostat? If the top tube on a hot engine is slightly warm - his job. Now a little about the symptoms of overheating. On the instrument panel is a scale with an arrow. The arrow indicates the coolant temperature. The scale is the plot, shaded in red - a zone which should never enter the temperature gauge engine. In fact, it is there never comes in any case, I have not reached on a set of completely different cars. Both domestic and foreign cars. I will try to explain why. The temperature sensor is located in the hot seat motor - in the head unit or the next. When the motor starts to boil, the vapor bubbles appear in full accordance with the laws of physics in the hot seat. And there is the sensor. Heat capacity of vapor and liquid differ quite substantially, so the information that the engine "boils", will be conveyed to the driver not the temperature gauge and steam jet from under the hood or torn cotton cap the surge tank. If you wait until the temperature reaches the "red zone", in 9 cases out of 10 power plant in the future can be used only as scrap or to pay for substantial repairs. When you try to resuscitate zakipevshy car so that he even drove to the place of permanent location for later recovery, will try to give some recommendations. Poured into the cooling system preferably the same, that there was flooded. If this is not possible, you can pour anything (within reason). However, after the trip system should immediately wash for several reasons, and to pull this not suggest, do not you will have to change the radiator, and then pump. Immediately pour cold water or antifreeze in an overheated engine can not - can "lead" cylinder head, cracking unit, in general, a pleasant enough. Power unit must be given some time to cool down and then restore the initial level of fluid in the system. Sometimes it happens to be easy - there are air pockets. So, pouring water or antifreeze, I recommend to crumple tubes that the coolant has taken its rightful place. Indirect evidence for the presence of congestion in the system or lack of coolant level is the cold air from the stove, running with a fully warmed engine. Tips above are useful mostly to owners of domestic appliances. Failure of the cooling system to run in my lifetime cars much more versatile because of the complexity and variety of designs. Relatively recently as an adapter between the drive pump (from engine) and the fan is actively used viskomufty. Some manufacturers still cling to such a scheme. The design is simple: as the time of sending the body uses a special fluid flowing through the coupling. Special bimetal spring opens or closes the channels, depending on the temperature. The higher it is, the higher the rotational speed of cooling fan. The design is very reliable, so now it is mainly used for off-road vehicles - Mitsubishi Pajero, Nissan Patrol. Go down will come - there is nothing to burn, margin laid. It is true that with time due to aging or leakage of silicone oil cooling system starts to work ineffectively. If you started to notice that the engine is under load started to get warm, it is possible that viskomufty time to replace. To test the clutch can be as follows: open the hood of the working of the heated car. Ask a friend drown out the motor. If the fan impeller to stop quickly, making for inertia is not more traffic - clutch work. If spinning for a long time - no. However, there are enough and exotic case of malfunction. In this article I gave general advice, but as you know, not all. Therefore, the ending should be.
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