Gasoline enters Carter. How does gasoline get into the oil? Why oil probe smells like gasoline

This post is 1 comment.

Many car owners periodically faced the fact that the oil probe smells like a gasoline. Since everyone's acuity is all different, knowledgeable car enthusiasts advise one simple additional manipulation: to move away from the car and try to spend the lighters on the flame. If the smell did not fail and the remains of gasoline are on the dipstick - a small flame will appear, testifying to the burning of fuel vapor. You can go to another way, without using a lighter: a drop of oil is put on a blank sheet of paper. If gasoline is - a drop of diameter begins to spread, wetting the paper. If there is no gasoline - the oil remains in its original form, its viscosity will not give a drop to spread and wet the paper base.

Why oil probe smells like gasoline?

Possible causes: mechanical gas station is faulty; Nozzle malfunction, or malfunction piston system. In the first case, the gas station is removed and the pumping lever pumps gasoline. Appearing on the wall of the engine of the engine or sharply amplifying smell of gasoline - evidence that the aperture of the fuel pump lost hermeticity. Elimination of this problem is possible in two ways, one of which is fast, but gives a short-term effect, it is adding several layers of cellophane into the diaphragm. And a more reliable option, it is a replacement of a fuel pump for a new one.

Nozzle malfunction.

How to determine the nozzle faults: Connect the pressure gauge and check the power supply pressure, determine the upper limit and for at least five minutes you will observe the change in the testimony of the pressure gauge. If the appliance arrow shifts to a decrease in the indicator, then the fuel comes through the faulty nozzles. Run the engine and, as soon as the optimal pressure in the power system is scored, disconnect the ignition. Now you will visually determine which of the nozzles is faulty (roughly spraying fuel). Faulty nozzles change to new or clean special tool, ultrasound (only in a hundred). If we visually determine the quality of spraying the fuel injectors fails, use plastic disposable cups, putting one by one for each of the nozzles. By a subsoil on the wall of the cup, you can determine which of the nozzles works faulty and clean it or replace it.

The cause of the smell can be a malfunction of the piston system.

Repair this problem is the most expensive and complicated. And most often this problem occurs when using low-quality oil or fuel. Poor-quality lubricating and fuel products leads to a climbing of the piston rings, as a result of which the fuel will be disappeared through the gaps resulting between the piston and the walls of the cylinder and enters the oil.

To identify this problem, you will need a compressometer. The compressometer is measured by the compression indicators of each cylinder. The difference in more than 10% of the norms specified by the manufacturer, speaks of a malfunction. Focused piston rings are washed specially designed for this chemicalsAfter which the oil change is required. In rare cases, the flushing does not help, then the engine is disassembled and the defective pistons are replaced.

1 comment on the record "Oil diploma smells of gasoline - cause and elimination."

Supplement the author of the article. Gasoline into the oil can also get from an incorrectly working spark plug. It happens, you buy candles in the store, check them, everything seems fine. And under pressure in the cylinders, they do not perfect their functions. Gasoline does not burn, falls into the pallet with small. Therefore, the ignition candles store must be checked under pressure. For this they have a special stand. On carburetor engines, the cause of gasoline to the oil can not be the tightness of the needle of the float chamber. Fuel mixture It turns out enriched and badly combines in the engine cylinders. The problem is solved by the replacement of the needle. If the gasoline situation in oil is solved, then the engine oil and filter should be replaced. Such oil lost its lubricating properties and can lead to engine jamming. And this is - overhaulwhich is worth it.

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 injector, then breakdown fuel pump disappears 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. Such situations can fully attribute gasoline in oil, and more specifically - gasoline entering 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 is worth noting that much depends on the amount of gasoline that has fallen into the oily 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 when the car is working, implement needed check Engine operation. 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.

Back to the category

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 exhaust gases are one of the mixing indicators of gasoline with oil.

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.

Back to the category

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.

Oil, which was influenced by poor-quality fuel, can quickly lose its operational properties. This will lead to a breakdown of the fuel and distribution mechanism. Technical malfunction It may optionally 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.

• 1 How gasoline gets into engine oil and which consequences may be
  • 1.1 From where gasoline gets into the oil: troubleshooting
• 2 what's as a result

As you know, experts and experienced motorists recommend checking the oil level at least once a week. Immediately note that there are quite significant grounds for this. Also, regular checks allow not only timely detect reduction in the lubrication in the motor, but also to evaluate what form and state is lubricant.

In other words, even if the oil level does not have significant deviations from the norm, however, it is noticeable to change the color, consistency or smell of lubricant, then such signs clearly indicate the need for DVS diagnostics.

In this article, we will consider the situation when during the inspection it was revealed that the engine oil smells like a gasoline, clearly noticeable gasoline in the engine oil, the causes of such a phenomenon and ways to solve the specified problem.

How does gasoline get into the engine oil and which consequences may be

So, the topic of the article itself allows you to answer the question whether gasoline can get into the engine oil. Indeed, fuel can be in oil, and even in engines with a fully serviceable cylinder-piston group.

We go further. The specified problem is quite serious and can lead to failures in work, a significant reduction in the resource of the motor, as well as to complete failure. power plant. Let's look at why it happens.

Let's start with the fact that gasoline in oil significantly worsens the protective properties of the lubricant, dilutes the lubricant. If you do not go into details, the more gasoline falls into the crankcase, the more seriously there may be consequences.

With a minor quantity of fuel in lubricant, the motor can work more noisy, while the wear of loaded nodes will increase slightly. To solve the problem, it will be sufficient to eliminate the problem of gasoline flow into the crankcase and replace the engine oil.

In other cases, riding on a very diluted fuel oil can cause the engine at which expensive overhaul becomes necessary.

The list of basic signs that in one degree or another may indicate the emergence of the problem under consideration, the following are noted:

• force aggregate loses its power, there is a noticeable fuel reservoir;
• the exhaust becomes thick, grayish, has the smell of unburned gasoline;
• there are failures in dVS work, the engine begins to trim, stuck;
• motor began to work noisily, there were knocks in the field of pistons, crankshaft, etc.
• the lubrication level in the crankcase is increased, while the smell of gasoline in the engine oil is clearly heard;
• lubrication dressed, drop motor oil It lights easily from open fire;

If you suspect a minor amount of gasoline in lubrication, you can also additionally estimate the properties of the oil using the "oil spots" method. To do this, it is enough to drop one drop of oil with a probe on a sheet of pure paper. Then you need to dry the leaf a couple of hours. Smooth smooth edges of a growing drop will indicate that the material has not lost its properties.

The black contour in the center of the spot indicates the presence of workable additives in the lubricant. We also note that this method is also useful for a general quality audit, the state of the oil, identifying the presence of water in it and other impurities.

If any of the indicated signs were noticed (noise during operation, knocks, overrun, lubrication, smell of fuel, a drop when calibrating on a sheet differs from normal), then it should be prepared for the fact that gasoline can be in the oil.

As already mentioned, the consequences of further riding on such a mixture can be different. The main thing, gasoline is a rather aggressive product with respect to lubricant materials, as it contains a large number chemical additives.

In engine oil, also contains a whole package of additives, while the specified additives are not designed for direct contact with the fuel. In other words, there is an irreversible change in the physical and chemical properties of engine oil. For this reason, raising the oil level due to gasoline is a serious threat to the engine.

I also add that antifreeze can also fall into the oil system, as a result of which the emulsion is formed. In this case, lubricant also loses its properties. If the leaks are intense, then at the time of starting the motor can occur.

As for gasoline in lubricant, a certain danger is that quite often fuel dilutes the lubricant gradually, that is, it falls in small quantities. This means that the driver does not notice the problem for a long time, continuing to exploit the unit in the usual mode. In this case, the wear of the motor increases greatly. Now let's move on to how gasoline gets into the oil.

Where gasoline gets into the oil: troubleshooting

To understand why gasoline in engine oil, you need to contact constructive features Differs.

First of all, on any motors (injector, carburetor), fuel falls into the Carter from the combustion chamber through the piston rings. It is important to understand that if pouring gasoline into the cylinders of the new motor, after a while it will be in oil. The reason is simple - fuel flushes the oil film and passes through looseness in the location of the piston rings.

Motors with carburetor frequent cause Gasoline getting into the oil is damage to the fuel pump diaphragm. Another reason for diluting the oil fuel is the problems with a needle valve of the carburetor in the float chamber, overflow fuel into the carburetor, etc.

Taking into account the above, it becomes clear that the main cause of gasoline in the lubricant is problems with the system or ignition system, as well as with the OI itself. It turns out that malfunctions may arise due to the fact that:

• there is a significant re-enricmentation of the working mixture;
• there were malfunctions fuel injectors, carburetor, mechanical fuel pump;
• the ignition system is defective or works incorrectly;
• the engine is faulty or worn, no desired compression in the cylinders, the fuel is not ignited;

In other words, fuel can be supplied in excess, but the rich mixture is not ignited. Also, gasoline does not burn, since there is no spark on the spark plug or the charge does not burn due to low compression in the DVS. In any case, unburned fuel falls into Carter.

If the carburetor "overflows" the gasoline into the float chamber or "pour" injection injectors, then fuel will also block the cylinders and then fall into the oil. In order to exclude fuel from entering the oil in one way or another on the injector, it is necessary to check the tightness of the injection injectors and make them clean.

It is also recommended to conduct computer diagnostic Motor, evaluating the quality of the mixing formation, separately "nicknit" the ECM sensors that can affect the formation of the mixture. The condition of the fuel pump diaphragms is controlled on the carburetor internal engine, is regularly configured and the carburetor is diagnosed.

Before cold start (especially in winter), it is necessary to periodically monitor so that flowing gasoline does not appear under the carburetor. If such a phenomenon was noticed, then check the carburetor.

In parallel, you need to pay attention to the special drainage tube. If the tube is clogged, the surplus of fuel when problems with a needle valve begin to fall into the CARTER DVS. Now let's take a look at the most common causes in more detail.

Considering the fact that the fuel feed system on different engines It can be very different, differ and ways of gasoline entering the lubrication system. On motors with injector gasoline served from fuel tank Under pressure, which creates electric fuel pump. At this stage, the oil with flammable can not be mixed.

• At the same time, mechanical benzonasos is installed on carburetor motors. The diaphragm of such a pump is injected by gasoline into the carburetor installed on the engine. The rod of the mechanical pump on some auto has a drive from the eccentric, and also lubricated with engine oil by the same scheme as the camshaft.

If the pump diaphragm is damaged, gasoline begins to enter the rod channel, penetrating the lubrication system. When the membrane is not damaged, then the accumulation of gasoline in oil will occur slowly, the lubrication level will not rise. The problem seems to change the smell of oil, as well as some disclosure.

In the event that the membrane has large gaps, gasoline ceases to be supplied to the carburetor, the engine is launched with difficulty, jerks and failures appear when moving, the unit works unstable, etc. To eliminate malfunction, it is necessary to replace the gas station membrane, as well as engine oil.

• In the injector, most problems are associated with nozzles, since the ignition failures, the experienced driver fixes immediately. A more complex is the situation in which one or more injectors cannot be closed hermetically. This means that after stopping the motor fuel, which is located in the fuel ramp under residual pressure, proceeds to the collector, then falls into the cylinders, then flows into the crankcase.

Piston rings to some extent prevent falling out of gasoline into the oil, but if they are worn or cluttered, then fuel relatively freely falls into the pallet with oil. To solve the problem, you need to remove the fuel rail, after which the tightness of each injection injector is checked.

To do this, in the pressure injector is served washing fluid or kerosene, as well as the opening and closing of the nozzle from the power supply. You can use a special bench for checking and cleaning nozzles. If the nozzles flow, then they need to be repaired or replaced.

• As for the ignition system, if in one of the cylinders or in several mixtures is not ignited, then part of the fuel fly out in graduation systemAnd the remaining parts simply settled on the walls of the cylinders, then flow into the Carter DVS.

Faults of the ignition system are diagnosed in normal order. First, the spark plugs are checked, then high-voltage armorberry, coil, rubber, and other elements that are installed on a particular car.

• Worn CPG is common problem carburetor and injection engine. As a rule, we are talking about the wear of compression and oiling rings. In such a situation, fuel actively flows into the Carter. It is important to take into account that problems with rings also lead to a decrease in compression.

It turns out, the mixture is worse compressed and burns deficiently, the engine loses power. The driver is stronger than gas, feeding more fuel into the combustion chamber, but the burning does not fully occur. Excessive fuel leads to the contamination of the motor and the formation of a car, and also partially falls into the crankcase.

That in the end

As can be seen if gasoline enters the oil, then the engine before eliminating breakage should not be operated. This phenomenon is particularly dangerous when the driver did not know about the problem, that is, a large amount of gasoline has accumulated in the crankcase, the pressure in the lubrication system fell, the emergency oil pressure light was caught fire on the dashboard.

In such a situation, it is necessary to immediately eliminate the main problem by repairing the ignition system, carburetor or injection injection. Also, an obligatory procedure will be the replacement of oil with which it is better not to delay.

Finally, add that in some cases the reason for the inefficient combustion of the mixture in the cylinders may refuse the fuel itself. The fact is that gasoline is often very low quality.

Fuel, which is mixed with third-party additives, is worse. Unburned residues can also fall into the car carriage. In some cases, it is enough to replace the oil and start refilling on another gas station.

Also in some sources for prevention purposes, it is recommended to twist the motor at a short time high revolutions, Making trips along the highway. Such ride leads to a higher heating of the oil, which helps reduce the content of the accumulated condensate and falling into fuel lubrication.