Why oil in the crankcase smells gasoline. Oil dipstick smells like gasoline - causes and elimination. How to determine that gasoline got into the oil

Motorists in their mass, as a rule, never pay attention to the smell of oil. And it can smell gasoline. It is necessary to know that if such a smell appeared, then it is necessary to establish the reason for its occurrence. Since this suggests that, with a great degree of probability, a malfunction appeared in the car engine.

The essence of the problem

In a good engine, the lubricant system in which the oil circulates is isolated from fuel system. As a result, it cannot penetrate oil. However, if this happened, the oil control probe will exhibit the gasoline smell (oil smells with gasoline).

If the driver does not believe its sense of smell, the presence of gasoline on the dipstick is quite simple. To do this, you need to move away from the car for a sufficient distance and affect the probe by open fire by means of a lit match or lighter. The presence of gasoline is determined by the flash, while pure oil It will light up very slowly.

Auto mechanics, as well as motorists with experience advise to check the oil level once a week. System and permanent checks will allow reveal a decrease in the oil level in the engine. And also to evaluate its condition.

If the oil is in permissible boundaries, but its color and consistency have changed, the smell appeared, the oil smells like gasoline, then these are signs indicating the need to perform engine diagnostics internal combustion.

Gasoline may appear in oil even in the engine, which has a completely working cylinder-piston system. However, if the engine oil smells like a gasoline, then this is considered to be serious. It may entail failures in the operation of the motor, reduce its life, and also lead to its full breakdown.

When gasoline gets into the oil, it begins to lose its properties, becomes more liquid. The more gasoline penetrated into the oil crankcase, the more significant the damage.

The main signs of the appearance of gasoline in oil

Specialists in the signs indicating the emergence of the problem of fuel penetration into lubricant include the following:

• The engine begins to lose power, increases noticeably fuel consumption.
• Exhaust system Gives a gray and thick exhaust, in which there is a smell of gasoline.
• The engine begins to make failures, told, periodically stuck.
• The engine work has become noticeably louder, the knocks in the piston system are recorded, in the area of \u200b\u200bfinding crankshaft and other engine nodes.
• Oil probe shows that the oils in the crankcase became greater, the engine oil smells like a gasoline, which is clearly captured.
• The oil has become more liquid, his drop with the probe calmly flammives from open fire.

METHOD OF QUALITY QUALITY OIL

There is a way to check the quality of oil. It is used including when checking on the presence of gasoline in it. The method is called "oil stain". When using it on a sheet of paper, one drop of oil from the probe is dripped. Paper dried about 2 hours. If the edges of the spreader drop smooth, then this reports that the oil does not lose their properties. The black contour in the central part of the spot indicates that the lubricant has operational additives. This method is used to assess the qualitative condition of the oil, establishing the presence of other inclusions in it, including water and gasoline.

It is worth understanding that fuel (gasoline) is an aggressive product in relation to oil. It includes a significant number of varied chemical additives and additives. Engine oil also has additives, and they should not contact with fuel. If the contact of gasoline and oil occurred, then it should be understood that at the same time irreversible changes in the physical and chemical parameters of the engine lubrication occur. As a result, if in the Carter oil level increases due to fuel ingress, this is a serious threat to the motor's motor.

But why oil smells gasoline? To answer this question, it is necessary to understand how it falls there.

Ways of gasoline to oil

To understand why gasoline penetrates the motor lubrication, it is required to obtain an idea of \u200b\u200bthe design of the internal combustion engine.

1. The main way of penetrating gasoline into the engine crankcase from the combustion chamber (both injector and carburetor engines) are piston rings. Frequently often gasoline falls into the crankcase on new engines. When the piston rings are not yet fit, there are loyal in the cylinders.
2. Engines equipped with a carburetor have weak link - This is a fuel pump diaphragm. If it is deformed or has a different defect, then gasoline will definitely penetrate the engine lubricant. Other reasons include problems with a needle carburetor valve, a valve of the float chamber, fuel overflows, etc.

Causes of oil pollution with fuel

It follows from this that the main reason for dilution of gasoline oil is problems in the system of nutrition and ignition either in the engine itself. Systematizing all reasons, you can get the following picture:

• the working fuel mixture is subjected to re-enrollment;
• faulty nozzles, carburetor, fuel pump;
• there are malfunctions of the ignition system, it works incorrectly;
• the engine is worn, there is no compression in the cylinders, the fuel ignition does not occur.

Due to the above reasons, fuel is fed to the combustion chamber in excess. This leads to the fact that it is concerned and cannot ignite. The fuel does not burn in particular due to the lack of spark on the ignition candle or due to small compression.

Fuel, which is not burned, penetrates the oil crankcase.

In any case, if the fuel penetrates into the oil, the engine is not recommended to exploit until the causes and elimination of the problem. This is especially dangerous if the driver does not know about the problem, and a significant amount of fuel has accumulated in the crankcase. The pressure in the lubrication system drops, the dashboard flashes an emergency condition of oil pressure.

With such a situation, it is necessary to immediately take steps to eliminate the main problems. This is done at stations, which are engaged in the repair of the ignition system, carburetor, injector injection. Be sure to replace the oil and oil filters. If after that there are no signs that the engine in the engine smells with gasoline, the reason is eliminated.

Fault of gas station

In the car, which is equipped with a mechanical benzonasosos, its diaphragm pumps gasoline directly into the carburetor. However, if it is damaged, overshadowed, fuel paves the path to the rod canals. The pump of the pump is driven by an eccentric, which is involved in the distribution of oil in the engine. Therefore, gasoline easily finds itself a way to the oil environment. You can identify this problem by learning the smell of fuel on the dipstick (oil smells with gasoline). If the diaphragm damage is insignificant, the lubrication level can remain the same for a long time. However, with significant gaps, gasoline no longer goes into the carburetor in the required quantities, the car starts with difficulty, its movement occurs with jerks. Usually, the fault is eliminated by replacing the diaphragm to a new, which is included in the standard repair kit of the fuel pump. If when checking after repair it is not found that the oil in the motor smells like a gasoline, then the problem was solved.

Malfunction of nozzles

If the engine is an injection system and if the oil smells like a gasoline, the reason is that there are problems with nozzles or the ignition system. Nozzles, one or more, do not provide hermetic closing. After turning off the engine, the fuel due to the residual pressure penetrates the collector, and then into the cylinders. If the piston rings are not worn, then gasoline will not fall into the crankcase. But if they are operated for a long time, there is a rings, they will not be able to prevent gasoline leakage into the oil crankcase. To eliminate this malfunction, it is recommended to remove the fuel ramp and check each nozzle for tightness. In this case, cerosene or special liquid from aerosol cylinders are supplied under pressure on them. If nooking is installed, as well as damage to the candles, they are replaced with serviceable.

Fault of a piston system

The elimination of this problem is considered the most expensive and difficult. Usually this fault occurs if low-quality oil and gasoline are used. Low-grade fuel and lubricants lead to the fact that the piston rings are locked. The fuel begins to leak through the gaps that occur between the piston and the walls of the cylinder. Then it gets into the oil crankcase.

To identify the specified malfunction, the application of the compressor will be used. They measure data on the compression of cylinders, each separately. If the readings differ more than ten percent of the established norms, this indicates the presence of a malfunction. Piston rings subject to stamping, washed chemicalsspecially designed for these purposes. Replacing the oil after such a procedure is required. Typically, the engine oil does not smell gasoline after such a procedure. If the flushing of the cylinder block did not help, which happens infrequently, then the engine disassembly in order to replace faulty rings and pistons.

Embossed fuel

Sometimes the cause of incomplete combustion fuel mixes In the cylinders is the gasoline itself. It is not uncommon that at filling stations the quality of fuel leaves much to be desired. Moreover, gasoline can be mixed with other additives, due to which it is harder to ignite. Unburned fuel mixture residues penetrate the engine crankcase. In these cases, it is necessary to start using another gas station to eliminate the problem, but the oil will still have to replace.

Separate specialists are advised to prevent when traveling to free tracks to give the Motor to work a slight time at high speed. This way of driving leads to more high temperatures Heating oil. This reduces the amount of condensate accumulated in the lubricant and hitting gasoline oil.

The paths of penetration of gasoline into the oil of two (main - through the fuel pump). The lower diaphragm protects the top from crankcase gases, and in the case of the upper rupture - does not allow gasoline to get into the crankcase. Therefore, it is necessary to periodically monitor the state of the diaphragm, it is in your interests.

The second path is through the carburetor if it is unreliable (needle) valve of the float chamber in it. In this case, the car can work on "loaded" modes, i.e., with a large consumption of gasoline. When gasoline consumption decreases (for example, idling), its level in the float chamber begins to increase due to the leakage of the valve, up to the overflow of the carburetor. As a rule, it is accompanied by the inevitable effects of the mixture with a dark smoke of exhaust, increased content of CO, a decrease in idling speed and even a complete stop of the engine.

So that the drainage gasoline does not accumulate under the carburetor, the drainage tube is used for removal, built into the collector. But when it is clogged (and this happens often) almost all of the surplus of gasoline fall into the engine cylinders (if hot, they almost completely evaporate). But when starting a cold engine (with the defect mentioned above), gasoline over the walls of the cylinders flows into the crankcase where it is mixed with oil. In the future, when the engine is working, the gasoline contained in oil is also evaporated, therefore it is not always possible to notice it. If you try to detect gasoline, draining the oil immediately after a few minutes of driving at high speed, then it will not be practically not, although when you start a cold engine, you clearly feel its smell. Therefore, foreign manufacturers advise at urban exploitation to regularly leave for the high-speed route and perform half-hour trips to remove from oil from the oil when the gasoline engine is frequent.

The high percentage of gasoline content in oil, as a rule, issues flames idling Emergency pressure light in the lubrication system.

Quite often, drivers on the forums complain on the smell of gasoline in oil. Someone smells strongly, and someone feels only a light smell. But each person has an individual's perception of the smell, and it is possible to correctly assess the situation with the help of special equipment.

However, if in the VAZ 2109 gasoline in oil is a sign of a malfunction, and the most minimal consequences may be related to increased flow Fuel. In the worst case, the engine can fail.

How does gasoline get into the lubrication system?

Gasoline can get into the lubricant system with two main ways:

1. Through the gas station. This is the main way. The lower diaphragm is a protection for the top from crankcase gases. If the upper diaphragms occur, it does not allow gasoline to enter the crankcase.

1. Through the carburetor. If the shut-off valve of the float chamber will be unreliable. As a result, the car operates on overloaded modes, spending large amounts of gasoline. When reduced consumption ( idling), in the float chamber, its level due to the valve leakage increases until the carburetor is overflowing.

How to identify the presence of fuel?

To avoid the accumulation of gasoline under the carburetor, the drainage tube is provided, which is mounted in the collector. However, if it is clogged, which happens quite often, surplus gasoline in obligatory Penetrate the engine cylinders. If the engine is hot - they will evaporate, however, with a cold engine, gasoline flows into the crankcase and mixes there with butter.

During the operation of the motor, the fuel can evaporate from the crankcase, so it is not always possible to notice it. Even if they drag the oil of their crankcase immediately, after a few minutes of high-speed driving, there will not be gasoline. But, the smell in the crank can clearly feel during the start of the cold engine.

On the presence of gasoline in the lubrication system VAZ 2109 inform:

• increased fuel consumption;
• extraneous noise, as well as a knock in the piston block;
• engine power while starting from place and movement under mountain;
• lubrication level and color of the engine;
• cooling fluid level.

If such signs are observed, experts recommend contacting the car service. But any driver can solve the problem independently. As mentioned above, in addition to faults of the fuel pump and carburetor, the cause of this problem can be the failure of the nozzles on injector engines and piston system On all types of engines.

How to solve the problem?

If gasoline in oil in the VAZ 2109 is detected, it is necessary to urgently eliminate the cause of its hit.

Replacing the aperture of benzonasos

If, when checking, it was found that the aperture of the fuel pump was faulty - crackled or were tested, they must be replaced.

To do this, the upper part of the fuel pump is removed, the diaphragm node is removed, the nut on the rod and the diaphragms are removed. After that, new, and everything is collected in reverse order.

Cleaning the drainage tube under the carburetor

To eliminate the pollution of small channels, a container with a liquid for cleaning the carburetor is suitable for the drainage tube. With it, it is worth cleaning and the carburetor itself. It is strictly recommended to apply metal wire for these purposes.

Check Injector Power Injector Injector

If one of the nozzles is completely closed, the fuel can penetrate the cylinder, and then through piston clearances to the oil. To test the pressure in the system, you need to use a pressure gauge and rubber hose. The upper pressure limit should not be below 6 kgf / cm².

Faults of the piston system

This malfunction is the most expensive.

It is that as a result of the use of fuel and lubricants Low quality on the pistons can form a nagar, and the piston rings are clogged. The grooves in which the rings are installed are clogged with soot, as a result of the ring losing elasticity. Due to the gap between the piston and the cylinder walls, the part of the incoming fuel eludes.

The driver with experience is easy to determine a similar problem. And to solve it, that is, eliminating the engine to the engine, apply special fluids. However, their use is sometimes able to further aggravate the problem. Therefore, it is necessary to use the cutting fluids in strict accordance with the manufacturer's instructions, and after the completion of the procedure, it is completely replaced by oil.

In the absence of the effect of the use of cleaning liquids, you will have to make a complete disassembly of the engine, remove the pistons and repair their repair. This repair will be difficult to perform at home.

Replacing lubricants

Do I need to change the oil when gasoline gets into it? The answer is unequivocal: you need to change the benzo-oil mixture, and it is recommended to do it urgently. The reason is that otherwise, its oxidation increases, and as a result, the parts are affected by corrosion, the viscosity is reduced, slags are reduced, the flare point is reduced.

However, most unpleasant consequence It is a sharp deterioration in the lubricating properties of the oil. As a result, the working surfaces of the engine parts can be intensive wear. This is especially true of those parts to which the lubricant is not under pressure, but by splashing: the walls of the cylinders, distribution Vala, cams, etc.

Loss of lubricating properties of oil becomes the cause of engine overheating. As a result, due to the expansion of parts at elevated temperatures they can jam.

By car VAZ 2109 plums of oil and its replacement can be carried out at home.

Sulfuric acid problem

During the combustion of fuel, part of the gases that expand, falls into the space under the piston. These gases contain many substances, among which are pairs of different acids. As a result, the amount of sulfur that is present in the fuel affects the amount of sulfur and sulfuric acids penetrating into the oil. Accordingly, the more sulfur in the fuel, the greater its acids fall into the oil.

Sulfuric acid contributes to the acceleration of engine oil oxidation, thus reducing its operational resource. As a result, it turns out a fairly simple dependence: the smaller the fuel contains sulfur, longer oil will be able to work.

It is impossible to say anything about the content of sulfur in fuel only in one of his appearance. All that the driver can do is to see the appropriate station on the gas station.

Finally

How can you make sure the reasons for fuel from the oil can be different. But in any case, if gasoline penetrates the car lubrication system VAZ 2109 or any other, you need to urgently take the necessary measures to eliminate the causes, and then completely change the oil.

If you continue to use the vehicle in a similar condition, the consequences can be the saddest. To make sure that you can see photos or video status of engines when the oil is oxidized as a result of fuel from entering it. Experienced Master Drivers, of course, will solve the problem with their own hands, however, those who are poorly understood in automotive technology, it is recommended to contact car services. This, of course, will be more expensive, but - more reliable.

I have a strange trouble when checking the oil level: from the probe there is a smell of gasoline. It seems that the engine oil cannot smell gasoline, it is clear to everyone. It is written on the forums that the reason must be sought either in the boosal rings, or in nozzles that are not closed or closed loosely. But can it be so? And also called the third reason - a malfunction of the fuel pump. How to start a search, and whether there are other reasons?

Reply to these questions!

The smell of gasoline in engine oil, from where?

If the engine is an injection, then the fuel pump fails immediately. The motor without him would simply be covered. But the nozzles can really freeze, especially if water contains water. The reason with the skeleton of the rings is checked by yourself - it will be enough.

Even the probe smelling a gasoline should not

In the first step always watch the candles. If "Black Nagar" is present, the cause will be one of two: either too rich mixture, or ignition skipping. Try to distinguish the first from the second: if the motor "Troit" can be heard. In addition, the error with skipping should diagnose the ECU block - the Check lamp lights up.

The same thing but in order

Suppose Check lamp really light up. Then we are looking for an error 0300 , 0301-0304 or 1301-1304 .

Two Candles, Normal and Nagar

If all candles burned the same, then the reason will most likely be in the malfunction of the nozzles. They can "climb": the progress of the valve will limit the ice, which is always melting as it warm up. Tip - In this case, change the refueling.

And the clogging of filters is not true for our occasion. Here, on the contrary, the mixture is too enriched.

There are cases when the nozzle did not close completely, but then the motor should smoke ... There is nothing terrible, by the way, there is no one - you are sitting and stopped. But the oil will have time to apply harmful evaporation.

Engine oil does not smell like gasoline just like that. We must look for the cause, checking the ignition and nozzle system.

Compression as the cause of gasoline smell?

An unlikely option when compression, but not oil-changing rings.

Three different rings on the piston

Therefore, it makes sense to perform initial diagnosis:

• Let the smell of gasoline in the engine oil present, but the oil itself is not spent or even "arrives." Conclusion: Rings did not turn around, no compression is not necessary.
• If both factors are present, that is, the smell of gasoline and oil consumption, then carry out any measurements late - the boosal rings are already allowed to know about themselves.

Nevertheless, in order to assess the level of the problem, in the case of 2 measurements are carried out - a strong deviation will be detected from the norm.

If the deviation does not exceed 5-10%, or about which rings can not be thought about. Example: 14.2-15-15.4-15. It is still "norm."

It turns out that the initial conclusion is not made according to the results of measurements, but only by observations of the oil level.

Compression Promper, Nissan Almera

By the way, we considered only injector, but not carburetor engines And no motors with direct injection.

Video example: gasoline in carburetor engine oil

How does gasoline get into the oil? During operation vehicle At times there are strange and unpleasant phenomena. These situations can be with complete confidence Take gasoline in oil, and more specifically - gasoline getting into the engine oil. Such cases are often fraught with emergency situations and breakdowns. To avoid this, you need to know the reasons why gasoline is still in the engine oil.

Fuel into the oil can lead to a vehicle breakdown.

What is dangerous gasoline hitting?

The problem is actually very serious. When gasoline enters the oil, it causes severe reactions that sooner or later lead to technical faults. It should be noted that much depends on the number of gasoline that has fallen in oil liquid In the crankcase. In the event of a small amount of fuel in general, the mechanism will not work well for some time. But the emergence of certain defects in this situation is still inevitable. In the case of a large number of gasoline mixture in lubrication, it can lead to very quick mechanisms. Among the consequences of fuel entering lubricant liquid It is worth highlighting the following:

Gasoline entering the oil leads to a violation of the engine's working cycle.

1. The fuel coefficient of correction is disturbed, which is why the engine periodically stops work.
2. The speed of movement falls, the car is harder to squeeze its maximum. It can be combined with temporary stops of the entire engine.
3. Faults appear in the piston system.
4. Complete engine technical malfunction. Cause in damage to the carburetor and the subsequent fuel from the oil. This happens when it gets very large volumes of gasoline.

These are the most common consequences. Fortunately, they occur not so often, but this is not a reason for calm.

How to install that with a car is not all right? The fact that with the car is not all right, you can learn in a number of signs that, by their character, indicate exactly the presence of gasoline fluid in oil.

To avoid severe consequences, it is necessary to periodically diagnose. But how to find out about the presence of such a problem? In fact, everything is very simple.

It is enough to know these signs, do not ignore them and pay attention to their appearance during the operation of the car, carry out the necessary verification of the engine. Among these signs are noted as follows:

1. High fuel consumption. The fuel is consumed very quickly just for the reason that part of the material is dried into the carcase to the oil.
2. Loud noises, knocks in pistons. Such defects most often indicate malfunctions in the fuel processing system.
3. The engine power decreases, the car is increasingly harder to get into the mountain.
4. Increased lubrication level in the pan in the engine area and its changed, unnatural color.
5. The drop in the level of fluid designed for cooling.

If these signs become visible to the naked eye, you need immediately, immediately ask for help in the car service. It will cost expensive, but complete, comprehensive repair is even more expensive.

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How does gasoline, turn out to be in an oil crankcase?

Beltasos - one of the ways of gasoline getting into the oil.

As gasoline falls into the oil is definitely unknown until now, but specialists in this area claim that there are two ways to develop events. Fuel can get into the oil in the following ways:

1. The first way is that gasoline fuel penetrates into the oil through the main fuel pump. The fact is that the lower part of the pump's diaphragm protects the upper part of the malicious crankcase gas vapors. In the event of a rupture of the upper layers, the pump does not allow gasoline to get into the Carter itself. To avoid such an unpleasant event development, you need to control the position of the diaphragm from time to time, their condition. So it will be possible to avoid gasoline in such a way into the oil.
2. The second path of fuel to the oil lies through the carburetor. This may occur if the device is defective or just an unreliable needle valve in the float chamber. In this situation, the car starts to work in the overload mode, which entails a very big flow Gasoline.

When the consumption of gasoline falls, its volume in the float chamber begins to grow sharply due to the malfunction of the valve itself. So, it happens until the carburetor overflow. This process is accompanied by heavy effects associated with excessive enrichment of the mixture.

Dark traffic fumes - One of the mixing indicators of gasoline with butter.

The symptoms of this phenomenon are manifested in dark exhausts from the chimney, and in some cases - a complete stop of the engine. In such a situation, everything that remains is to carry the engine for expensive repairs in the car service.

To avoid such a development of events, it is necessary to monitor both the state of the aperture and the float valve and the carburetor. If the problem with the carburetor is noticed in time by a car owner, he should hurry. In order to the carburetor, the fastened gasoline was accumulated, for its output, a special drainage tube is needed, which is built into the collector. But the nuance is that if the drainage tube is clogged, it happens often, all surpluses of gasoline are condensed directly to the cylinders of the motor aggregate. If the temperature is high, they almost immediately evaporate. But with a cold start of the engine, gasoline flows along the walls in the Carter, where ultimately it is mixed with oil.

Often everything is happening so that the car owner does not know about gasoline in the oil, even if it falls for a long time and repeatedly. As a rule, the driver can learn about the huge excess of gasoline in the oil when dashboard Emergency pressure light lights up in the lubrication department.

But the light bulb does not always work. The gasoline level in oil is often small or the warning system has failed. As mentioned above, in most cases it does not lead to breakage immediately, but strongly reduces the duration of the workflow of vehicles.

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Embossed fuel

Subcase fuel is one of the reasons for mixing gasoline and oil in the crankcase.

Another reason why it is believed to be a gasoline fluid can penetrate the crankcase, is the poor quality of the oil in the crankcase. The fact is that the selling gasoline is often very substantial.

The buyer will often acquire a fuel, mixed with additives, which are already malicious connections in their essence. We are talking about Benzene, Toluela, etc. They can be much faster to fall into the crankcase with an oil element than high-quality fuel. Manufacturers in pursuit of fabulous profits began to create new additives, mix what is impossible to mix.

Butter that has been influenced by poor-quality fuel can quickly lose their operational properties. This will lead to a breakdown of the fuel and distribution mechanism. Technical malfunction may not necessarily be associated with a diaphragm or carburetor defect. Often the reason is just low-quality fuel

Therefore, to neutralize the problem in some cases it is necessary to simply change the fuel itself. You also need to be careful when choosing a fuel if there are signs that surrogate is poured into the car. You need to immediately change this brand of fuel to another. This happens quite often, since the quality of fuel and lubricants is often raised.