The lawn mower is going on white smoke from the exhaust pipe.
White smoke and water from the exhaust pipe: the causes of appearance, how to fix the problem
If water and white smoke are dripping from the exhaust pipe, accompanied by these defects, then this will affect the functioning of the motor. He reacts with a delay to pressing the gas pedal, consumes more fuel. The load on the parts of the cylinder-piston group increases, which accelerates their wear.
Water and smoke from the exhaust pipe can be a natural phenomenon due to the formation of condensate in the system, and a sign of serious malfunctions with the motor. Therefore, it is useful for the driver to understand these cases and be able to eliminate problems.
Should white smoke go from the exhaust pipe in the summer
When fuel combustion, hot gases are formed that go through the muffler. But their small part settles on the walls of the exhaust system in the form of condensate when the engine is inactive. This natural phenomenon is explained by the law of physics (dew point).
It is characteristic not only in winter, but also with a cool summer, when there is a strong difference in ambient temperature and air inside the car.
The amount of smoke from the exhaust pipe depends on the volume of condensate. There are a lot of it:
- drivers who rarely make long trips;
- when driving in raw weather (fog, rain);
- In automobile systems with a modern catalyst.
As a result, the next time the car is launched from the pipe with a stream, water goes and the white steam that does not smell leaves. These effects disappear after the engine heating (ICE) to the operating temperature. But, if the liquid does not stop flowing, and the air smells of gasoline, then this is a serious reason for concern.
In this case, moisture comes out of the muffler not with steam, but with white smoke. over, accompanied with the following problems:
- falling coolant level;
- oil spots in antifreeze;
- thick gas formation;
- complicated launch of the internal combustion engine;
- unstable testimony of the tachometer;
- exceeding the temperature of the motor.
In addition, sometimes an antifreeze smell is felt in the air, and black soot is observed on the spark plugs. If you control the amount of oil, then on the probe you can see a milk plaque.
White smoke from a silencer. what is it
The car is a slender system of components and assemblies. like a living organism, gives the owner signals about various kinds of faults. However, not every owner reacts to such a “trifle” as thick white smoke from the exhaust pipe of a gasoline engine. Meanwhile, the color of the exhausts, the frequency of the phenomenon (short.term or frequent). harbingers of serious repairs: sometimes it comes to capital.
Exhaust gases consist of water vapor and many chemical compounds, among which the main ones are a mixture of nitrogen and carbon dioxide. Before releasing into the atmosphere, the developed substances are cleaned in the catalyst.
What is the danger of white smoke from the exhaust pipe
If the car is in order, the gases are colorless. A small cloud of whitish smoke during a cooling power plant, as well as at the time of the launch of the internal combustion engine in the frost, should not strain the driver. Paul is released rather: water. a by.product of gasoline combustion. condenses in a cold exhaust path and becomes visible. This picture is considered normal.
Worse, when a dense white train stretches behind the machine with a warm day, and the motor is warmed up to operating temperature. Analysis of the phenomenon in most cases indicates the technical malfunctions of the vehicle.
The main causes of white smoke from the exhaust pipe of a gasoline engine
It is important to be able to distinguish harmless water evaporation and smoke itself. The steam is easy, without a trace, disappear in the air, then, as smoke turns into an oily blue fog behind the feed of the car. Consider the causes of white smoke from the exhaust pipe of the gasoline engine to correctly assess the costs of restoring the mechanisms and systems of auto.
Cooling liquid leakage
The most important node in the design of the machine, which always requires attention, drivers consider the cylinder block.
BC can be depressurized for several reasons:
- The gasket burned out;
- the cylinder head was deformed due to incorrectly twisted nuts;
- A crack appeared in the cooling shirt of the block.
The last nuisance occurs according to the negligence of drivers, which add cold water to the hot engine or defrost the block with a large minus on the thermometer. Tosol enters the cylinders of the leaky block: white smoke comes from the muffler. Other symptoms appear:
- The motor lubricant is cloudy, a bright yellow-brown emulsion appears in it, which is easy to notice in the flood neck;
- Bubbles are formed in the expansion capacity;
- The candles get drunk, smell of antifreeze, but sparkle like new ones: the working fluid perfectly launders the details;
- power unit Troit.
The danger of a coolant in the cylinders is that ethylene glycol (component of antifreeze and antifreeze) is mixed with a motor lubricant, forms solid particles. The latter, acting, as an abrasive, destroy the details. And lubrication loses its qualities. Together, these circumstances derive the entire block out of the working condition.
They smoke both cars on injectors (Toyota, Renault, Peugeot), and technicians on carburetors (motorcycles, motoblocks, scooters).
The causes of white smoke from the silencer are as follows:
- The supply of the fuel mixture or the operation of the gas distribution mechanism was violated, which leads to incomplete combustion of gasoline;
- the components of the cylinder piston group have worn out;
- There were problems with the cooling of the motor.
The last reason is the most likely for injector engines. Additionally, you will notice:
The smoke from the steam in injectors is characterized by high density, the smell of burnt oil, prolonged dispersion. A very disturbing signal when smoke does not disappear after heating the car.
The appearance of white smoke due to condensate
The graduation tract, having stood the night, is covered with drops of moisture. Condensate is actively formed on metal in cool weather, when on a thermometer below 10 ° C. The appearance of moisture in the silencer is also facilitated by high humidity.
During the morning heating, the components of the exhaust system become hot, exhaust gases mix with drops of water, forming steam. As the condensate disappears, white smoke disappears.
Poor.quality gasoline with third.party impurities
Some drivers save on gasoline or diesel, fill the tank with cheap fuel at dubious gas stations. So you risk paying for water, which will freeze in winter and seal a small fuel filter net, plus an excess amount of sulfur. In combustion chambers, the substance turns into sulfur oxide, then mixing with water vapor, into sulfuric acid. The consequences for the engine will be catastrophic.
In the “left” gasoline, the octane number that causes destructive detonation is not controlled. And contains a toxic benzene and aromatic carbohydrates that increase soot, “eating” rubber and plastic. Alcohols and ethers create air traffic jams in fuel highways.
Systems suffer from low-quality gasoline: inlet and release, fuel supply, exhaust, ignition. In addition to detonation, poor launch of the car, power loss, you will hear knocks in the engine, you will observe a dark exhaust in the rear.view mirror.
Oil burning out due to rings (smoke with a shade)
The remains of the motor oil from the rods of the valves and walls of the cylinders are removed oil scrap caps and rings. Worn rings lie, so excess lubricants burn out.
At the initial stage, the defect is noticeable during lifting uphill with a half.pressed gas pedal. A bluish smoke appears and quickly dissipates. In critical cases, the oil.removable rings of the smoke accompanying the car constantly, most of all when recruiting speed.
Moisture entering the cylinders
Under “moisture” should be understood as a cooling liquid. The reasons why white smoke comes from the exhaust pipe, look for cylinder heads or head defects. Most likely, these are cracks.
For accurate diagnosis, remove the lid from the expansion tank, start the engine. Now examine the liquid for oil spots and a specific exhaust smell. The discovered signs indicate microcracks or wear of the BC gasket.
Is the problem of thick smoke from the muffler
A proper diesel in cold weather gives an exhaust in the form of a cloud of a scondmented steam. Normally, combustion products of diesel fuel are quickly dissolved in the atmosphere. But the emission of white dense smoke from the silencer indicates problems with the diesel engine.
The exhaust can leave fat drops and have a persistent burning smell even on a well.heated car. Smoke happens due to cooling problems, mixing of motor oil with antifreeze or antifreeze. Also, a dense exhaust with the smell of burning happens with deviations in the ignition system. The engine craving is reduced, fuel consumption increases.
Machines in which white smoke is a serious problem:
Fix lawn mower blowing smoke
- Tractor, Excavator MTZ;
- Land Cruiser;
- Chevrolet Lacetti, Lanos;
- Peugeot 408;
- Toyota Corolla;
- Ford Transit;
- Fiat Doblo.
Tighting the repair can lead to a serious breakdown of the internal combustion engine. The exhaust of black or gray or indicates the problem with the supply and incomplete combustion of diesel fuel.
Causes of white smoke from a diesel engine
Deviation in the work of the ICE is reflected in the characteristics of the outgoing gases. The color and density of the cloud changes, the tangible smell of burning and oil appears.
List of common causes of white smoke from a diesel silencer:
- condensate in the device removal;
- not complete burning of diesel fuel;
- large soot on the electrode candles;
- poor compression in cylinders;
- fuel pump malfunction;
- OZH getting from the system into the engine.
There is dense smoke into the cold from the car pipe, which is quickly disappearing with warming up. Exhaust may also change due to clogging of the air filter, reducing the level of cooling fluid in the system. But more often the pipe smokes white due.
The many hours of the car in a cold parking lot or in an unheated garage leads to steam condensation in the gas removal device. After warming up the engine, the moisture evaporates and comes out with a dense fog. If the white smoke from the exhaust pipe of the diesel engine during launch remains after a temperature set, then some systems and nodes of the machine are probably faulty. By the color and smell of smoke, you can evaluate where the breakdown occurred. What components and parts are required to repair or replace.
Sometimes with the engine problems arise only in work at high speeds. White smoke from the exhaust pipe of the diesel engine at load flies out due to antifreeze ICEs entering the cylinders. The exhaust can purchase a color tint from the components of the refrigerant fluid. If you press the gas pedal, then the gray and black emissions with the smell indicate incomplete burning solariums. Changing the composition of the exhaust from the silencer more often occurs due to worn parts of the internal combustion engine. Sometimes the cause of white smoke from the exhaust pipe of the diesel engine during load can be a filter clogged with dust, as well as diesel fuel with impurities.
The reasons for the appearance of a white smoke with a smell
Blue (light-gray) smoke from the exhaust pipe, as a rule, accompanied by a very unpleasant odor-a sign of active combustion of something that should not be burned normally, or it does not burn where it is provided for by the design.
The reasons for the brutal smoke and smell from the exhaust pipe can be associated with all the above problems. depending on the degree of “neglect” of the problem. This is especially true for oil burning in the cylinders if the car owner did not contact the service at the first signs. In addition, diesel engines with various malfunctions also usually give thick blue smoke.
The first thing you need to remember the owner of a car with a diesel engine: modern, working, seasoned with high.quality fuel diesel smokes and smells no more than his gasoline brother. The appearance of smoke from a muffler of any color and density is a sign that something goes wrong as it should.
So, if the smoke is dense, blue and a strong smell of diesel fuel is felt. we are talking about incomplete combustion of fuel in the cylinders. If this happens on a newly started, unrown car, especially in cold weather, and smoke with the smell disappears after a few minutes. there is nothing to worry about. Just the engine did not immediately reach the operating temperature.
If the puffs of smoke fell from the exhaust pipe in warm weather on a heated car. perhaps the antifreeze leak in the cylinder chamber. A characteristic feature. such smoke is quickly dissipated. In this case, it is necessary to quickly eliminate the problem, since the interaction of fuel and antifreeze leads to the destruction of cylinders and pistons.
Bluish smoke with the smell of burning oil. accordingly, the oil in the cylinders burns. The causes and consequences are the same as the gasoline engine.
Blue smoke with a sharp, suffocated smell. associated with the incorrect work of fuel nozzles. The reasons for the red smoke and smell from the exhaust pipe: if the nozzles begin to inject too large drops of fuel into the combustion chamber, the latter begin to settle on the walls of the cylinder and burn, melting the metal. It is this smell. burning fuel and metal. the car owner feels. You can’t hesitate to a visit to the service center. you can completely ruin the engine.
The reasons for the appearance of an unpleasant odor from the exhaust pipe without smoke
If the exhaust smells unpleasantly, but without pronounced smoke. this may be due to any of the above faults if they are at the initial stage of development. In addition, this can happen if the catalytic converter has become unusable.
It is the problems with him that can be accompanied by unpleasant, “chemical” odors of the exhaust, while the smoke may not be. Direct road at the same time. to a car service, to replace the catalyst.
White, blue, black smoke made of exhaust. THE REASONS!
Familiar picture: launched the engine after a long parking lot and thick smoke fell from the exhaust pipe. It is possible that after heating it will decrease, and when the trip it will disappear at all. But more often it happens otherwise. Smoking continues and clearly shows that there are some problems in the motor. Long inaction served as a kind of impetus to their sharp manifestation.Smoke from the exhaust pipe is both white, black, and any intermediate shades. Color serves as an important diagnostic feature. The operation of an engine with increased smoke is often accompanied by other deviations from the norm, although sometimes inconspicuous. They must be captured and noted in order to more accurately assess the situation.Typically, the appearance of smoke is associated with the malfunctions of the following working bodies of the engine: control systems (mainly fuel supply), cooling system, mechanical part (piston group, distribution mechanism, etc.D.). In accordance with this, smoke arises either due to incomplete or “incorrect” combustion of fuel, or coolant entering the cylinders, or oil intake there. The presence of oil, coolant or excess fuel when combustion in the cylinders and gives a characteristic color exhaust gases.If we analyze possible malfunctions, it turns out that in many situations smoke is the same in color, although it has a different nature. Another circumstance: often a malfunction of one system that is provided by source of smoke arises due to problems and defects in another. Here is a characteristic example: the poor operation of the cooling system leads to overheating of the engine and, accordingly, burning piston rings. As a result of this, oil enters the cylinders and causes smoke, the cause of which is essentially secondary.It is better to start a search for the cause of smoke with a comparison of all the circumstances: the nature of the smoke itself, the concomitant phenomena, possible external influences. We will talk about the characteristic combinations of these factors.
White smoke from the exhaust pipe is a completely normal phenomenon for the modes of warming the cold engine. Only this is not smoke, but steam. Water in a vaporous state. a natural fuel combustion product. In a non.Georged graduation system, this pair is partially condensed and becomes visible, and water usually appears on the cut of the exhaust pipe. As the system warms up, condensation is reduced. The colder the environment, the more dense and white the steam is obtained. At temperatures below.100 with a white pair forms on a well-heated engine, and with frost in minus 20-25 degrees it acquires a thick white color with a blue tint. Air humidity also affects the color and saturation of steam: the larger it.White smoke in the warm time and on a well.heated engine is most often associated with the ingress of coolant into the cylinders (for example, through a leaky block of the block head). The water contained in the coolant does not have time to completely evaporate when burning fuel and forms a rather thick white smoke (in fact, again steam). Its shade depends on the composition of the coolant, weather and illumination on the street. Sometimes he looks blue, recalling “oil” smoke. It is easy to distinguish the water vapor: it immediately dissipates, and after the “oil” smoke in the air, bluish fog remains for a long time.To verify the guilt of the cooling system, a number of targeted checks will be required. It is easy to clarify that water is really thrown out of the exhaust pipe, not oil. To do this, on a well.heated engine, the hole of the exhaust pipe with a sheet of paper is closed for a short time. Drops of water from the sheet will gradually evaporate and will not leave obvious fat traces, and they will not be fat to the touch.Next, the search must be agreed with the engine design. The liquid can fall into the cylinder due to not only damage to the gasket, but also cracks in the head or cylinder block. All these defects during the operation of the engine cause exhaust gases entering the cooling system (sometimes even a gas cork is formed there), which serves as the basis for recognition.Opening the cork of the radiator or expansion tank, it is easy to notice the smell of exhaust gases and a film of oil on the surface of the cooling liquid. And the fluid level will be reduced. It is characteristic that in such cases, after starting the cold engine, the pressure in the cooling system immediately increases (it is easy to feel with your hand by squeezing the upper radiator hose), the fluid level in the expansion tank increases rapidly. over, this level is unstable and in the tank you can notice the output of gas bubbles, sometimes with a periodic ejection of coolant from the tank.If the engine is stopped, then the picture will change. The liquid begins to go to the cylinder. Gradually, it passes through the piston rings and enters the oil, into the gang of the crankcase. With subsequent starting, the oil with a liquid is mixed, forms an emulsion and changes color. it becomes opaque and lighter. By circulating according to the lubrication system, such an emulsion leaves the head of light yellow-brown on the lid of the head and cork.This is checked, taking out the oil probe and opening the neckline, but if the defect (crack, cigarette) is small, then there may not be any changes (it happens that the oil remains clean, although the foam on the cork is formed). On the contrary, if leakage in the cylinder is essential, then the liquid, accumulating above the piston, even prevents the thumbs of the crankshaft by the older at the first moment when starting. In particularly severe cases, a hydraulic is possible in the cylinder, deformation and breakdown of the connecting rod.Sometimes it is possible to clarify the place of the defect. Once in the cylinder, the cooling liquid actively “cleans” everything that is in contact with, so the spark plug will look completely fresh. If the air is supplied to the cylinder through the opening of the candle under pressure (for example, through an adapter with a hose or a special leakage tester), then the fluid level in the expansion tank will begin to increase (when checking, it is necessary to turn the crankshaft to the position in which both valves are closed, put the car on brake and turn on the gear).Further inspections are possible only with the head of the block head. Assess the condition of the laying, the planes of the head and block. The gorge of gaskets is often accompanied by deformation of the head plane, especially if the defect was preceded by engine overheating (for example, due to a malfunction of the thermostat, fan and other reasons). Worse if there are no obvious defects. Then it is necessary to check the head for tightness under pressure; It is most likely that a crack will be found on the wall of the combustion chamber (more often near the outlet of the exhaust valve). You should also carefully examine the cylinder, lowering the piston into the lower dead point. The crack in the cylinder is a rare defect, but if it is, it is easy to detect it. The edges of the crack diverge (the walls “breathe”) and often turn out to be polished with piston rings.It also happens that the coolant enters the cylinder through the intake system-for example, due to the leakage of the gasket of the intake manifold (if it simultaneously complies with the heating of the collector with a cooling liquid). In such cases, the pressure in the cooling system does not increase, the smell of exhaust gases is not in it, but the oil turns into an emulsion, and the coolant level quickly decreases. These signs, as a rule, are enough to find a defect and not confuse it with the described above, otherwise the head of the block will be in vain removed.All problems associated with white smoke from the exhaust pipe require not only the elimination of direct reasons. Since defects, as a rule, are caused by an overheating of the engine, you should check and eliminate the malfunctions in the cooling system. it is possible that the thermostat, the inclusion sensor, the coupling or the fan itself does not work, the radiator, its cork, hoses or joint.If white smoke and concomitant defects are noticed, then you cannot operate the car. First, defects are progressing quickly. And secondly, the work of the motor on the water-oil emulsion sharply accelerates the wear of the parts and after several hundred kilometers without overhaul, most likely, you can no longer do.
What to do if smoke appears with a shade with a sharp press on gas
A sharp start from the place causes a cloud of exhaust gas. this is a variant of normal development of events. When smoking does not stop, it constantly accompanies your trips, both with a minimum and maximum load, then we are talking about problems.
It is especially dangerous to ignore the appearance of a white or black dense smoke. Such phenomena can talk about the wear of details: nozzles, pistons, cylinders. Because of this, oil or antifreeze can flow through the gaps, creating an optimal environment for the development of soot.
If the smoke is oily in nature, and you think about the presence of a fabric, then try to check the version using a simple tool. After starting the motor, wait for the full heating, and evaluate the condition of the cut of the exhaust pipe.
If the oil does not have time to burn, then drops remain on the metal. Когда внутри происходит перегар, то на трубе появятся частицы сажи. With these conclusions, you can contact a service station or conduct an independent internal diagnosis.
Smoke from the exhaust pipe with a sharp acceleration may be one of the options for the norm or evidence of malfunctions. It depends on the characteristics of the release: on the shade of the cloud to the degree of density and the frequency of appearance.
What can I tell smoke from the exhaust pipe about
Smoke from the exhaust pipe is one of the right signs of an existing or coming serious breakdown, requiring expensive and complex repair. He can not just tell a lot about the technical condition of the car, but also help identify and localize the malfunction of the power unit. We tell you how to learn how to “read” breakdowns by smoke and what consequences for your car he threatens.
Before starting to study the exhaust, it will be useful to understand: usually not smoke comes out of the muffler pipe, but a banal water vapor, which is a by.product of the internal combustion engine. There is nothing wrong with it. If only the motor of your car has not warmed up, air humidity is moderate, and the temperature on the street is very plus. And that’s why.
Smoke from the exhaust pipe can conditionally be divided into three types depending on the color. white (it is ordinary water vapor), blue (or blue, who likes it more) and black (this one you won’t confuse with any other). Each of them has its own root cause and indicates specific malfunctions.
Let’s start with the simplest and most common white “smoke”, or a couple, which is a much more correct definition.
As we noted earlier, water vapor is a natural by.product of the internal combustion engine. It is especially actively formed at low ambient temperature and high humidity. When the engine is warming up, the appearance of steam is the norm even in the summer-it occurs due to the deposition of condensate in the release system, and also comes out when fuel combustion, no matter how paradoxical it sounds (yes, there is also water in insignificant quantities in gasoline).
It is worthwhile if the car warms up, the street is warm enough, but the exhaust pipe is still “smoking”, moreover, nothing like that is observed on other cars. Noticed? Then sniff out, perhaps you will feel an uncharacteristic unpleasant odor. this is how the antifreeze is “burned”, the basis of which is water.
How to clean the details of the exhaust system correctly.Antifreeze enters the engine combustion chambers, and then in the form of steam is released from the exhaust pipe. There are few reasons for its entering the cylinders: the most common. a breakdown of the head of the cylinder head, less often there is a little more unpleasant. microcracks in the block itself. On some engines, “cooling” enters through a leap.in intake manifold with a heating system is not excluded. In all cases, antifreeze will leave the expansion tank (it is very difficult to not notice), in addition, it can start mixing with oil and get into the engine crankcase.
Repair will require impressive investments and partial disassembly of the motor. Sometimes to invest in eliminating this malfunction is inappropriate for financial reasons. it is more profitable to purchase a deliberately working contract engine. Note that even the best gaskets of the GBC rarely experience 200-300 thousand without consequences. km of run.
Blue or blue smoke. it is no longer steam at all, but a product of combustion of motor oil. There can be many shades of such smoke, but neither with white nor, especially, with black it will not be possible to confuse it. The saturation and color of such smoke depend on the degree of breakdown and volumes of burned oil. The smell of brutal smoke is also special, reminiscent of the one that came from old Soviet motorcycles and mopeds with two.stroke engines without a separate lubricant system. Concomitant a sign of a breakdown. strong oil.
If you are still not sure that your smoke is associated with the ingress of oil into the combustion chamber, substitute a sheet of white paper to the exhaust pipe. the drops on it will have fat stains.
The main reasons for the flow of oil into the cylinders are only two. The first is the strong wear of the details of the piston group. breakdown or resting of the rings, dummy on the cylinder mirror (all this is indicated by the decline in compression). This malfunction pulls the overhaul of the engine or its full replacement. The second reason is much more “enjoyable” and requires penny investments. wear of the oil sewer caps. The latter regularly serve no more than the term of work of the GBC and easily change without disassembling the engine in any car service. The benefit of such details (by the way, strongly unified) costs only a few hundred.
On turbocharged engines, oil can fall into the exhaust system and due to the malfunctions of the turbocharger-wear of the bearing and sealing of the rotor. Another, more rare reason for the appearance of oil smoke is the leaky valve and problems with the ignition system. “Catching” such smoke and finding its cause is not easy. In any case, you should not delay the repair. this will only aggravate the situation.
The simplest and most “easily read” smoke has black. It is impossible to confuse it with some other.
Such smoke is a sure sign of rewriting the fuel mixture: gasoline does not have time to burn in the cylinders and forms a lot of soot. With high speeds of the motor, smoke can be very thick. The reasons for such a breakdown lie in the leakage of fuel nozzles or breakdown of electronic sensors affecting the mixture and ignition. Additional symptoms are a drop in the power of the motor, uncertain launch and unusually high fuel consumption. Diesel engines smoke more intensively than gasoline, including due to breakdowns of soot filters.
Pulling with the elimination of such a malfunction is especially fraught with. Fuel, uncontrollably entering the cylinders, removes the oil film from the walls. This, in turn, causes bullying on the mirror and accelerated wear of the piston group. Detonation. an inevitable breakdown satellite. destroys the motor with strong vibrations. The catalyst also suffers, in which increased temperatures occur due to fuel burning in it. Sometimes gasoline goes so much that it flows into the engine crankcase, where it mixes with butter.
Any type of smoke is a signal to the fact that you should immediately stop the operation of the car and transfer it to the hands of specialists. Repairs delay are fraught with failure of the entire power unit. However, having looked closely and sniffing, in most cases you can independently diagnose the cause of the breakdown, which means it is much less than the means to spend on diagnosis and repair. As you know, the masters are not averse to earn extra money on ignorant customers and successfully enjoy their trust.QUTO.ru/Journal/Help/7550 PS%3a%2f%2fzen.Yandex.com
What can smoke from the exhaust pipe tell about
Smoke from the exhaust pipe is both white, black, and other shades. In this case, the color serves as an important diagnostic feature and sometimes directly indicates the malfunction that arose in the engine. We will talk about them.
The appearance of smoke can be associated with the malfunctions of many systems and working parts of the engine: power systems, cooling systems, ignition systems, injection control systems, cylindrical group, distribution mechanism, and so on. In accordance with the cause of the malfunction, smoke occurs either due to incomplete or improper combustion of fuel, or due to the entering the coolant into the cylinders, or due to the flow of oil, which gives the exhaust gases a characteristic color.
Often a malfunction of one system that is provided by a smoke source occurs due to malfunctions and defects in another. Here is a characteristic example: the poor operation of the cooling system leads to overheating of the engine and, accordingly, burning piston rings. As a result, oil enters the cylinders, which causes smoke.
It is better to start a search for the reason with a comparison of all visible circumstances: the nature of the smoke itself, the concomitant phenomena, the possible influence of the external environment.
White smoke from the exhaust pipe is a completely normal phenomenon for the regime of warming the cold engine. Only this is not smoke, but steam. Water in the form of steam. a sign of high humidity in the exhaust system. In an unheated exhaust system, moisture from the air is partially condensed and becomes visible, and water usually appears on the cut of the exhaust pipe. And as the system warms up, condensate and pairs disappear.
However, at a temperature below 10 ° C, the white pair is also formed on a well.heated engine, and with frost in –20-25OS it acquires a thick white color with a blue tint. So the colder the environment, the more dense the smoke from the exhaust pipe is obtained. In addition, air humidity affects the color and saturation of steam: the larger it is, the thicker the steam.
But the appearance of white smoke in the warm time and on a well.heated engine is most often associated with the entrance to the coolant cylinders (for example, through a leaky blocking of the block head). The water contained in the coolant does not have time to completely evaporate when burning fuel and forms a rather thick white smoke (that is, again steam). Its shade depends on the composition of the coolant, weather and illumination on the street. Sometimes he looks blue, recalling “oil” smoke. It is easy to distinguish the water vapor: it immediately dissipates, and after the “oil” smoke in the air, bluish fog remains for a long time.
To make sure that the problem is in the cooling system, a number of targeted checks will be required. It is easy to clarify that water is really thrown out of the exhaust pipe, not oil. To do this, on a well.heated engine, the hole of the exhaust pipe with a sheet of paper is closed for a short time. Drops of water from the sheet will gradually evaporate and will not leave obvious fat traces, and they will not be fat to the touch.
Next, when searching, you must take into account the engine design. VK.COM/Cars.Best liquid can fall into the cylinder not only if the gasket is damaged, but also when the cracks are formed in the head or cylinder block. Sometimes these defects during the operation of the engine cause exhaust gases entering the cooling system (sometimes a gas cork is even formed there), which serves as the basis for recognizing the cause of smoking.
Opening the cork of the radiator or expansion tank, it is easy to smell exhaust gases and notice the oil film on the surface of the coolant. And the fluid level will be reduced. It is characteristic that in such cases, after starting the cold engine, the pressure in the cooling system immediately rises (this is easy to feel by squeezing the upper radiator hose with your hand). The fluid level in the expansion tank increases rapidly. over, this level is unstable, and in the tank you can notice the output of gas bubbles, sometimes with the periodic emission of coolant from the neck.
If the engine is stopped, then the picture will change. The liquid begins to go to the cylinder. Gradually, it passes through the piston rings and enters the oil, into the gang of the crankcase. With subsequent starting, the oil is mixed with a liquid, forms an emulsion and changes color. becomes opaque and lighter. By circulating according to the lubrication system, such an emulsion leaves a characteristic foam on the lid of the head and a cork of the oil-packed neck from light blue to yellow-brown. This is checked, taking out the oil probe and opening the neckline. But if the defect (crack, cigarette) is small, then there may not be any changes (it happens that the oil remains clean, although the foam is formed on the cork).
And on the contrary, if the leakage in the cylinder is significant, then the liquid, accumulating above the piston, even prevents the thief of the crankshaft by the starter at the first moment when starting. In particularly severe cases, even hydraulic hydraulic explorers, deformation and breakdown of piston rings, pistons, valves and connecting rods themselves are possible.
In some cases, it is possible to more accurately determine the place of the defect: getting into the cylinder, the cooling liquid actively cleans everything that is in contact with, so the spark plug will look completely fresh. If the air is supplied to the cylinder through the opening of the candle under pressure (for example, through an adapter with a hose or a special leakage tester), then the fluid level in the expansion tank will begin to increase (when checking, it is necessary to turn the crankshaft to the position in which both valves are closed, put the car on brake and turn on the gear).
Further diagnosis is possible only after removing the head of the block. In this case, the state of the gasket, the planes of the head and block, the appearance of the combustion chamber, the valve plates and the bottom of the piston are assessed.
The gorge of gaskets is often accompanied by deformation of the head plane, especially if the defect was preceded by engine overheating (for example, due to a malfunction of the thermostat, fan and other reasons). Worse if there are no obvious defects. Then you need to check the head for tightness under pressure. Most likely, a crack will be found on the wall of the combustion chamber (more often near the outlet of the exhaust valve).
You should also carefully examine the cylinder, lowering the piston into the lower dead point. The crack in the cylinder is a rare defect, but if it is, it is not difficult to detect it: the crack diverges (the walls “breathe”), and often the edges turn out to be polished with piston rings.
Differences of white smoke from water vapor
Thick white smoke water steam is also not a sign of normal operation. The first time after the launch of a cold diesel, condensate begins to be released, both from water vapor contained in the exhaust gases, and from moisture residues inside the pipelines and mulisure mandurators. But the intensity of smoke does not inspire fears, and after heating the gases gain transparency.
If this does not happen, then it is necessary to check what exactly the white color forms. It is difficult to distinguish the unsuccessful finely sprayed diesel fuel visually from water vapor, but by smell it is completely different substances. And the second sign forms the speed of evaporation of condensate from the white paper sheet brought to the exhaust pipe.
Lawn mower blows white smoke and leaks oil
The water leaves quickly, and the diesel fuel leaves oil traces and quickly spreads through the porous structure, having a significantly higher penetrating ability.
Purely white smoke from diesel fuel appears only in the most advanced cases, for example, when the fuel does not burn in one of the cylinders at all. With partial burning, free carbon (soot) is formed, and gases take a gray tint.
Why is white smoke from a diesel exhaust pipe
This may be due to inflammation disorders, as well as hits for the release of extraneous liquids, for example, turbine or antifreeze oils from the cooling system.
Incorrect regulation of the injection moment
Both early and later, the appearance of sprayed fuel in the combustion chamber leads to a decrease in time to fully allocate its energy. If it is ignited, but it will be burned already on the exhaust, then soot and gray smoke will form.
But with large quantities of an unrealized diesel fuel, it in the form of a finely dispersed spray reaches the cut of the exhaust pipe and is released out with white smoke. Diagnostics of the fuel system is necessary.
Violation of the dosage of fuel
With gross malfunctions of the fuel system, a situation is possible when most of the charge does not ignite at all, passing through the exhaust highway.
For example, if the tightness of a closed nozzle is disturbed. She begins to pour fuel constantly, the car smokes even in a heated state at a idle speed, and when clicking on the gas pedal, whole clouds of thick white smoke are formed.
At the same time, the fuel enters the engine crankcase, flowing down the walls of the cylinders, the level of oil in the crankcase begins to grow. The situation is very dangerous for the motor.
Cooling fluid intake in cylinders
When the head of the head of the block, antifreeze begins to suck into the cylinders. The same situation arises in the equally common case of the appearance of cracks in the material of the head and block. The intense mechanical mode of operation of the diesel engine helps this very much.
Antifreeze consists of water and ethylene glycol, both of these substances, especially the latter, form white steam when heated. You can verify the presence of leaks:
- to reduce the level of coolant in the expansion tank;
- observing the release of gases in the cooling system with a running engine;
- supply of compressed air to the cylinders of the engine with seething in the tank;
- by the education of an oil-water emulsion in the crankcase, which is noticeable on the probe and cork of the bay neck.
The malfunction requires immediate taking measures to replace the head laying, check the plane of the interfacing and crimping parts for the formation of cracks.