The cooling system of a car

The ignition of the gas mixture in the cylinders is developing a heat of up to approximately 1200 ° C. Unfortunately, however, this energy ?? ?? not be made to serve the locomotion. The heat must be dissipated, because the high temperature engine which can not long endure. Therefore, a cooling system is provided, wherein air and water play a major role, and with which the temperature can be kept below 100 ° C.

The water cooling

The engine has substantial internal cavities in the immediate vicinity of the cylinders. The? She is surrounded by water. Only the steel wall of the cylinder separating the combustion chamber from the cooling liquid. Naturally there is a proper seal between the block and the cylinder head where the cooling cavities continue. A leak? Ke gasket allows water which may accumulate in the crankcase. However, it occurs in the combustion chamber, then there can in extreme cases, steam coming out of the exhaust pipe. In order to prevent freezing in the winter, there antifreeze should be added to the cooling water. On their packaging can find indications suggest that? Sing with respect to the amount of anti-freeze to be mixed with the contents of the cooling system, the engine block in order to protect against frost damage. If this precaution is not taken, it can cause enormous damage. The water present in the cooling system is ice, and at the transition from the liquid to the solid form, instead of expansion will find so much power that even metals and cast iron can rupture under? Parts. Something similar happens if the water pipe at home be? Freezes. Is the system antifreeze be? Protected against temperatures of minus 20 ° C and the temperature would fall still lower, then it will wa? Not to freeze stiff. It is a soggy mush of ice flakes. The motor is then saved, but it is not nice for the water pump through? Need to go grind with his blades. However, we want maximum security and the best thing is to just leave your garage to specify how many degrees below zero the motor is protected. Now allowed to sit the antifreeze in the cooling system when the winter is over, but it becomes less effective over time. Today, therefore every two years or every 45 000 km Replace the coolant. The special formulation that has no water color ?? ?? more, but is the coolant, depending on the brand, red, green, blue or milky white-colored pair. Do you own the car at, buy a small amount so ?? s handy gauge in a car thing, so you can monitor whether the level is still OK.

Different types of cooling

We know three types of water cooling:
  • open cooling system;
  • semi-closed cooling system;
  • The closed cooling? system.

The open cooling system
This is one frequently encounter in ships and stationary motors for pumps or generators. The pressure in the system is equal to the atmospheric pressure; air can enter freely. When automobiles are seen in this system no longer thou? Use. For a car with such ?? s cool? System that runs in the mountains, the cooling water will boil faster. What ho? Ger we get, the less the air? Pressure and the lower the boiling point of water.
The semi-closed circuit
This cooling system is used extensively in car ?? s used. The radiator has a cover that the expansion fluid or air under the cap to prevent escape, at least, to fuse? Re height. If the pressure is too great, then opens the door and air and / or water will be lost. Excessive pressure is bad for hoses and radiator. Cools the engine, the liquid shrinks and the volume of clay? Ner. There is then pressurized nor is healthy for the system and a second valve in the radiator? Teurdop is now air to sy? Tem allowed. In any case, there is in this system while driving a she? Tighter overpressure underneath the radiator present. Even though the atmospheric pressure when driving in the mountains, lower the pressure in the radiator and the entire cooling system is high enough to prevent boiling of the coolant, unless the circumstances are extreme. Of course keep mountains of heavily loaded carts and the difficulty one finds in a hell? Ling often steamy ?? ?? cars to. It will be noticed that this right often are foreigners, that is, no people of the hill country, for they do know what their car ge being asked?. They keep it cool? System closely watched.
The closed cooling system
In fact, the difference between this system and the semi-closed system are not very large. The water which escapes from the last-mentioned system, and enga? Ren goes, will be in the closed sy? Stem collected in a pressure vessel closed by a cap. Upon cooling of the engine there thou? Flee liquid will be back? Sucked and nothing is lost. Usually one can find cool when closed? Systems the filler cap on the radiator? Tor but on the pressure and expansion vessel. Consult your booklet in this.

The water pump

The liquid in the cooling system is continuously kept in motion by the water pump. As with a central heating installation, the hot water from the place where it is heated, brought together via pipelines to the heat exchangers ge?, So that the heat is delivered to the order? Surrounding air. In house, the temperature is therefore comfortable. In the car, the heat is lost and the process just serves to cool the heat source. The same procedure, but with a different be? Doeling applied. Again hot heat exchanger radiator.

The radiator

The hot water from the block is put through a hose at the top of the radiator, where it flows downwardly through a system of pipes, while the airstream, there is playing freely around it. Between the pipes, there is a fine grid of copper or aluminum to expand the heat transfer surface. If the water arrived at the bottom of the radiator, then the descriptor? Temperature thereof decreased by about 30 °, and the cool water is now being re-introduced into the mo? Torblok through the pump and via a hose and the process re? Has endlessly.


Just before the water far the block? Let to flow to the radiator, it must pass through a valve that only opens when the water has reached a certain temperature. After the start, after all, the motor may have to be so fast? Corpse reach the operating temperature, because between the start and the attainment of the desired temperature, the abrasion? Tageproces in the engine is greatest. The valve or thermostat keeps the water accordingly, until it reaches the ge? Desired temperature. Which vary by brand and lies roughly between 70 and 85 ° C.

The fan

When the car is idling, the row is missing wind, which only begins to be effective at a speed of about 40 km / h. At the front of the engine is running, therefore, a fan, a substantial fin by the air through the radiator back to itself toezuigt. If the car is at speed, it would fin may be omitted. But he is driven by a belt on the crankshaft hole, keeps turning and the corresponding necessary energy is thus wasted as the driving wind cools.
Therefore, one has a self-regulating ?? ?? fan built? supported by either a mechanical or an electrical control system that the fan only in operation states when the temperature of the cooling water is required. There are systems in which even the fan in two snelhe? Den may be driven. The maximum speed is switched on when the temperature properly Going On. Put it so ?? s car still while the fan is running, you can hear by turning up the temperature to the desired level has dropped. That by turning happens when you get the ignition key from the lock. The system is thus indeed On that ??? ?? Recognized.

Interior heating

At the top of the block is still a tap from which a snake to a clay ruin radiator is mounted in the interior. An ex? Shutter in the supply line thereof can be operated by the driver from his position. This valve controls the amount of hot water for that matter? Flows. In modern cars is fresh outside air through vents to the radiateurtje directed where it is far? Heated, then the décor brings a pleasant temperature. When the wind fails, a ventilatorvin can be switched on, with many car ?? s in two speeds. Which brings fin than a forced air? Flow in motion which, if the engine is up to temperature, the heat in the cabin rapidly increasing. In traffic jams, the fin can better inoperative happy? Fen, otherwise exhaust from other vehicles are sucked in. As is to be driven in the summer, in the long-term file and the temperature of the cooling fluid increases too much, it can help activation of the heating to effect forced cooling of the motor. Or open the windows, of course.


In the cylinder block there is a detector, connected to an electrical contact on the block. Hence runs a wire to the dashboard to control the temperature pointer. It's Sense? Dig not too much engine ques? Gene as long as the pointer indicates that the operating temperature has not been reached. Which is the fastest way to level when di? Rectly after starting is quietly driven away. Row some time with appropriate speed in third gear. The engine will then ?? good ?? revs, allowing the engine temperature quickly rises to the desired level. The advantage of LPG gas is that the first kilometers without contents of the vehicle or turn the mo? Tor can be taken.

Air Cooling

On vehicles with air cooling eliminates the need to run the engine double? Walled off. Radiator, water pump and the entire hose wa state lapse?; the manufacturing costs of these cars are also lower. However, measures must be taken to cool the engine and to this end it is often equipped with cooling fins to the heat emitting surface magnification? In. Moreover, the row is wind effectively managed?; by a kind of hood is caused swirl, where? through the optimum air is brought into contact with the engine block. There is in that cap a strong fen? Fan will made to provide an idling enough cow? Loin air. In summer, the motor will be cooled less than the win? Ter, perches when an icy wind along the engine. It may even be necessary under these circumstances, the flow of cold air by braking valves. The interior heater with a Derge? Actual vehicle must be removed from the exhaust system because it confused? Cooling me here after all missing. The construction of the engine is simpler to repair and that's nice. No troublesome hoses, no problems with pakkin? Gene which are capable of passing water etc. A drawback of the air-cooled mo? Tor is that he makes quite a lot of noise. When the water-cooled engine, the sound is tempered by the mantle of liquid ?? ?? around? it. Now that is missing, the mo? Torcompartiment must be properly insulated to reduce the noise back to drin? Gene.


The temperature rises so high that the indicator needle enters the alarm level, set the wa? Gene directly to the side. It cated? Surprising that there is something wrong with the cow? Ling. The temperature of the motoro? Lie becomes so high that it is hunted not sufficiently able to conduct lubricating function, so that the pistons can jam. Of course a motorist does not look continuously at his instrumentenpa? Panel, but it can be useful to a ge? Habit of it though often do during a ride. It is better that the car already on the sidelines before any suspicious odors entering the cabin or steam clouds are visible.


By continuously heating the water, it always forms a little steam ont invisible quantities through the radiator? Understand, at least when we speak of the semi-closed circuit. The fluid level will decline slightly, and eventually the engine enough you? S cool. The temperature re? Gistreert timely. He goes langza? Designate merhand ever higher tempera? Ture. If you know what the normal position of the pointer, you will draw the right conclusion from the deviant behavior and timely water? Filling. The water level can only be? Check in regularly, together with the level of oil in the crankcase. In cars ?? s from the last few years, an expansion tank onto which are mounted the minimum and maximum. In cars ?? s older date in the filler neck to see the top? Side of cooling pipes. It wa? Is there at about 2 cm above. Fill to the brim does not make sense, because the liquid expands when warm and runs off via the overflow pipe or tube. Also always lost a small amount of antifreeze. Should you move around, so topping up with hot mo? Tor, always do this while the engine is running. If it is already boiling, give him an opportunity to cool off. Turn the radiator in such situations always loose with a protective? Ing cloth around your hand. Firstly, because the cap can be very hot; second, because there is hot steam to escape. The cap must be turned a quarter turn before you can remove it. Keep him after that quarter turn first moment on the opening. Bubbling water and steam can then escape without to lock up? At. Are you at a point where no water is available, please abso? Lute time for the engine to cool completely for you to follow? Runs the service station. It can not hurt to reiterate that there refilling after the mo? Tor has been glowing, must be done with the engine running, if possible after a proper cooling. Pour the cold water in small how? Quantities in so that it can interfere far? With the remaining hot liquid in motion. Too fast gie? Would not do a wave of cold water in the block ends up being internally still can be very hot. Rapid temperature change of the block can not be far away? Work and it can tear!

Leaky hoses

Another cause of loss of water can be a small leak in the water pipes. They should therefore regularly con? Inspected to be. Oil and grease, or simply old age, come down in the elasti? Its capacity so that they can crack over time. After a few years, forming small surface cracks, usually the first in the clips with which the tubes are fixed to put radiator, engine block and water pump. That may not be direct cause for panic. But you know that you should keep an eye on them.

Leaky water pump

Also through a leaky water pump is lost. Thus ont ?? s fault? Stand by adjusting too tight of the V-belt that drives the pump. The excessive force on the pulley of the pump draws this than Slightly askew and also the shaft of the pulley to the pump will then torsional twist. Therefore, the bearing is damaged and will seal which sits behind succumb eventually.
Are you looking for ?? n as possible defect, move while the engine is running, your hand near the pump back and forth. Is the pump leak, you can feel warm splashes. So ?? n control when moving engine parts does entail some risk. So do it very carefully and never impulsive grab something. Pay particular attention to the rotating fan. Sees through its speed can not move the fin and a drooping tie or scarf is so gripped by! Is the water pump leak, then it usually is in z ?? n replaced entirely. It is not a complicated operation, although it is sometimes difficult as before, the radiator needs to be removed. In addition, great caution is needed in order? That the cooling grid it is particularly vulnerable.

Leaking radiator

Flying gravel, gravel, sharp boulder? Particles or simply old age can also lead to lekjes in the radiator? Importer. If you can find the location of the leak, you can try and stabbing in a match. He must be in tight fit otherwise it makes no sense. Optionally, you first have to tighten the reins slightly. Is it lucifertje tightly into the hole, then swells the wood by moisture and will the thing? Apparently remain seated, but it is an emergency repair. There are also buses with wonder midde? S marketing, but it is clear that there is not adequate to repair the radiator to escape as? Soon you're back home safely aangeko? One. After removing the radiator you can put it in a special purpose company for repair to offer?. If you are handy and the leak is in a convenient location, you can be? To go self soldering, but then only if the radiator is made of copper. Aluminium is one seemed not to re? Parry. Get the repair cost is very high, then it seems to go better with the destructor look. Calcium deposits in the cooling water circuit is also a cause of overheat? Heating the engine. Normally slate contains? Thing of water, depending on where you live, large or small how? Quantities of lime in the long run, just as in the kettle on the stove, water heater in the bathroom or coffee against the metal will drop. Antifreeze that, in the cir? Cuit will remain, is the deposition of lime, as well as the formation of corrosion to? Gene. Should you however still have the impression that with this problem ma? You know, you can obtain a special purpose? Bier chemical preparation by mixing the cooling water. After a long drive, which is driven by firm, the problem should literally be unloaded on?, Then the coolant is drained and replaced. But read especially the instructions on the van after this.

A clogged radiator

Troublesome are the large amounts of flies, mosquitoes and other insects that allows the openings in the radiator? S block. On a nice summer? Day as though rain is in the air and the low flying insects, which you can finally play tricks. You can then heat the car at full capacity open up. Most unpleasant on a hot day, but you will increase the cooling capacity of the circuit thereby. You can try with an air hose or water hose to spray the insects inside? Out of it, if it is to sum? Shaped cars, due to lack of space in the engine compartment, it is necessary to dismantle the radiator before.
Comments (1)

And what do I as the "self-thinking" no task gets more fan with increasing temperature because the electronic system is broken?