Priora crankcase ventilation 16 valves for what

April 20, 2017 Lada.Online 187 838 65

If, while operating a LADA car, you notice that during load (when the air conditioner is running, the heating is on, etc.) in a traffic jam, the engine begins to operate unstably (troits, pulls poorly, etc.), perhaps the reason lies in the ventilation system crankcase The article proposes to solve the problem by installing a PCV valve from a foreign car.

Damage to power plant mechanisms

Damage to the power plant mechanisms responsible for proper mixture formation and oil separation in the combustion chamber (piston scuffing, oil scraper rings, burnout of valves, disappearance of honing, etc.) In this case, the oil enters the combustion chamber of the car, where it mixes with fuel and air vapors, burns out completely. Oil consumption with such a malfunction can be enormous, more than 1 liter per 1 km. Black smoke begins to pour out of the exhaust pipe. This malfunction is caused by driving on a “cold” engine. After 50-60 cold starts, honing sets the oil scraper rings in one direction, the seal is broken and oil consumption increases. The skirt comes off the pistons, the valves burn out, the oil seals become hard. There is only one treatment - engine overhaul.

Purpose of the air filter

Why do you need an air filter at all? It is through this unit that air is drawn in, which is then mixed with fuel and enters the combustion chamber. The filter, in turn, cleans the incoming air flow from dust and dirt.

If this is not done, the parts will wear out much faster, and the issue of engine failure will become a matter of several months. Many car enthusiasts underestimate the importance of filter cleanliness. This is mistake.

A malfunction of this unit or its contamination, at best, can lead to increased fuel consumption and deterioration of vehicle performance, and at worst, to the failure of expensive components of the fuel system or the engine itself.

( 2 ratings, average 4.5 out of 5 )

Operating principle of SVKG

Car engines have a ring gas exhaust system. The resulting gases as a result of the combustion of diesel fuel, gasoline or liquefied gas are not released into the environment, but are returned to the engine, where they are re-burned. The second end of the crankcase ventilation hose is attached to the intake manifold, with the help of which gases again enter the cylinder chamber for combustion. A significant part of the gases, when re-entered, ignite at the moment the fuel ignites, and the remaining ones are released into the atmosphere using the exhaust system. A small percentage of the gases are sent back into the cylinder chamber for re-combustion. This process is ongoing.

Design and principle of operation

Crankcase ventilation systems for different types of internal combustion engines have slightly different structures, but they all necessarily consist of several main parts and assemblies such as:

• air pipes;
• a ventilation valve, the purpose of which is the intensity of gas suction depending on the strength of the vacuum in the intake manifold;
• oil separator

Moreover, regardless of the type of engine, forced ventilation is designed in such a way that its circuit has two parts:

• small branch;
• big branch.

The first one takes gases from under the valve cover, the second one removes unwanted exhaust directly from the crankcase.

The operating principle of the crankcase exhaust system for carburetor, injection and diesel engines can also differ significantly, but the whole process can be described by the following sequence:

1. Exhaust gas intake from the engine crankcase;
2. Purification of these by-product gases in the oil separator from oil vapors and other mechanical combustion products;
3. Transfer of already purified gas through air pipes into the structure of the intake manifold;
4. Mixing crankcase gases with the prepared combustible mixture and burning it in the working cylinders.

Due to the possibility of a certain volume of gas entering the constant circulation from point 1 to point 4 and using part of the exhaust gases technologically to prepare the fuel mixture, the selection of exhaust gases from the engine crankcase is also called an exhaust gas recirculation system.

Crankcase ventilation VAZ 2107 injector

It’s time for me to take a photo and post my VF tune, but I still can’t get around to it, because I haven’t been climbing into the carb for a very long time

The point is to transfer the hole in the VF housing from which crankcase gases escape to the outer diameter of the housing. That is, filter crankcase gases along with the incoming air.

True, judging from the dispute below, this approach can suck in dust, which is present in large quantities in front of the filter. But it seems doubtful to me that air can be sucked in through the crankcase gas exhaust hose.

But say this thing. If you remove the pipe from the breather, will the engine wear increase, especially in the summer when there is a lot of dust in the air.

It seems to me that it should be increased, because air will be sucked into the pan bypassing the filter.

Re: Wear and tear is measured by money > which is spent on oil-contaminated air filters, on oil, which is topped up after each refueling, and on gasoline, the consumption of which increases.

The gasoline consumption will be the same, the oil consumption will be the same.

exactly. shut up. and look carefully at the dipstick on the working engine. having previously bequeathed to relatives to post on the Internet a post-mortem photograph with a probe instead of an eye.

You shouldn't be offended. It smokes and sends oil into the air vent, but worrying about those around me, I don’t pick up the phone. I just wipe the pan periodically.

Why don’t I understand this fundamentally? But I don’t want to change everything indiscriminately. The cause has not been localized. The oil separator has been improved. There is less oil. Compression is greater than 11 in all pots, which means no rings. Mileage 77k now. The problem appeared at 40 tests and is gradually getting worse.

Closer to spring I will try to change the MSK. It looks like they are fried on the exhaust valves.

But I won’t let the ventilation out. I respect others, like many here.

And I have to breathe ass because of people, excuse me, like you. You have to shut your nose and mouth while standing at a traffic light behind such smoke smokers.

The revision was inspired by the records www.drive2.ru/l/10605614/ and www.drive2.ru/l/470059638767748051/. The goal was to actually reduce the amount of oil escaping through the small ventilation circuit. The throttle, the idle speed control and the receiver were all covered in oil.

Purchased: Small circuit ventilation valve General Motors 94580183 Reducing valve Jp Group 1117701500 Crankcase ventilation pipe VAG 06B 133 783 BCPipe for pressure reducing valve VAG 06B 103 221 GEjection pump Hans Pries 113 901 755 Filter BIG Filter GB-6 13

Well, spring clamps. Some of the clamps remained after the “modernization” of the cooling system. Sold in packs of 10 pieces.

The filter was installed before the “modernization”. Accordingly, after every big trip I was covered in oil.

Actually, it caught some percentage of the oil. At first I limited myself to one valve in a small circuit and an ejection pump.

All hoses must be oil and gasoline resistant! VAG 06B 133 783 BC and VAG 06B 103 221 G made of petroleum oil resistant rubber. The hose on VUT was originally petrol oil resistant. Between the ejection pump and the valve on the small circuit there is an 8 mm Gates 3225-00053 hose. Purchased before.

The first positive thing is a smooth idle! Since this valve limits leakage at idle and during engine braking through the ventilation system. Well, accordingly, I hope that the oil consumption will be less))) After driving, it was noticed that engine braking has become worse. In principle this was expected. But with the ejection pump, the efficiency of the VUT, and accordingly the brakes, has increased (figures of 10-15% appeared somewhere). The pedal became a little lighter. Afterwards I installed a pressure reducing valve in front of the throttle.

The pressure reducing valve rests on the hood. It got right between the sheets of factory heat-noise-insulation. I thought that the plastic would fray, but it turned out that the plastic was rubbing the hood))) Suddenly there was more agility... Why would that be?))) Even when you open the oil cap on a running engine, before modifications and with a valve in the small circuit, there was an escape of crankcase gases. Like steam in a multicooker))) After installing the pressure relief valve, this effect was not observed. That is, the pressure in the crankcase became slightly below atmospheric pressure, which in principle should be the case.

I also updated the throttle cable. The original one broke at the place of rolling on the receiver.

This cable has a plus. This is a protective “elastic band” for almost the entire length and a fluoroplastic inner tube. It doesn't need to be lubricated. And he's a little softer)))

PS I forgot to add that the speed dips when turning on the lights and the swing at idle when the turn signals and emergency lights are working have decreased)))

Blow-by gases - how a ventilation system with a PCV valve works

The condition of the oil, and therefore the life of the engine, depends on the operation of the crankcase ventilation system. Engines of domestic cars and foreign cars, in which the entire system or one of the elements does not work, operate under very difficult conditions and often fail. After reading the article, you will learn how this system works, why it is so important, and how to check and repair it.

Engine crankcase ventilation

When the engine is running, some of the gases from the combustion chamber pass through the compression rings and enter the crankcase space. These gases consist of combustion products of the air-fuel mixture and unburnt fuel. Breaking into the crankcase space, they increase the pressure in the lubrication system. This can lead to squeezing out the seals and a significant drop in the oil level.

The gases that break into the crankcase heat the oil even more, because their temperature often reaches thousands of degrees. In addition, they enter into various chemical reactions with the oil, worsening its characteristics. During such reactions, resinous substances, various salts and other elements are formed that negatively affect the condition of the engine's rubbing parts. Therefore, ventilation of crankcase gases is extremely necessary, because it allows you to multiply the service life of the engine.

How does the crankcase ventilation system work?

Until 1961, in all countries producing cars, crankcase gases escaped into the atmosphere. After 1961, first in the USA, then everywhere, they began to use afterburning of crankcase gases.

To do this, they were fed into the intake manifold, from where they entered the combustion chamber. This approach has made it possible to reduce vehicle toxicity tenfold. In such a system, the Venturi effect is used to remove crankcase gases - the higher the air flow rate, the stronger the vacuum in the crankcase ventilation system. If you do not provide air flow into the system, the oil will begin to evaporate and oxidize heavily, as a result of which its characteristics will sharply decrease. Therefore, they began to install a valve on cars, which, when the pressure drops greatly, blocks the exit of crankcase gases. When the pressure exceeds the optimal value, it opens again and crankcase gases escape into the intake manifold.

There are two types of crankcase ventilation systems using intake air:

• a system in which the inlet and outlet hoses are connected to an air pipe connecting the air filter and the throttle body directly;
• a system in which only the outlet pipe is connected directly to the air duct, and incoming air enters through a valve that regulates the pressure in the crankcase.

In the first system, the balance between the vacuum at the outlet and the air supply at the inlet is ensured by correctly selected pipe sections and the position of the throttle valve. In the second system, the balance is provided by a spool (aka PCV valve), which opens when the pressure drops below optimal.

An oil trap must be installed in any crankcase ventilation system. Otherwise, oil droplets will enter the throttle valve and then into the combustion chamber, changing the fuel combustion mode. Oil traps come in various types. The common feature is that they separate oil droplets from crankcase gases and return them to the engine.

Diagnostics and repair of the crankcase ventilation system

All system malfunctions are associated with contamination of the tubes or weakening of the valve spring. To check the system, do the following.

Warm up the engine to operating temperature, remove the cap from the valve cover filler neck. Place your palm on the filler neck and press the gas pedal or throttle/fuel control knob several times to raise the engine speed to 2-2.5 thousand per minute. If your hand feels an increase in pressure while accelerating, the crankcase ventilation system is faulty. If the pressure does not increase, but there is a suspicion that the system is not working properly, turn off the engine and let it cool.

After this, remove the PCV valve. Blow into it first from one side, then from the other. A working valve only allows air to flow in one direction. If the valve leaks air in both directions or does not pass in either direction, it must be replaced. At the same time, it is advisable to remove all the system tubes, wash them with kerosene, and then dry them with compressed air. After this, it is advisable to clean all metal pipes of the system. During this work, be careful not to drop dirt into the engine. After cleaning the system, it is advisable to change the oil.

Troubleshooting

The first thing you need to pay attention to is the color of the exhaust, blue or black smoke, a sign of burnt valves or problems with rings. Next, you should check the compression in all cylinders. The value on gasoline internal combustion engines should be within 11-13 MPa. Disconnect the pipes from the valve covers, air intake and breather

Assess the degree of contamination. If the pipes are very dirty or clogged with oil deposits, use gasoline to clean them or a special carburetor cleaner. Check the condition of the oil separator. Unscrew the required bolts to get to this unit. Remove the oil separator and assess its condition. If necessary, clean or rinse followed by drying. Inspect and, if necessary, flush the breather valve. There are situations when the valve gets stuck, resulting in exhaust gases entering the crankcase and creating excess pressure. Remove the part and wash it; in most cases, this will resolve the issue of squeezing oil out of the breather.

Helpful advice! To distinguish stuck rings from a burnt-out valve, it is enough to perform several manipulations. After checking the compression in the cylinders, determine the cylinder with the lowest value. Then inspect the spark plug of this cylinder; if the rings are lodged in this cylinder, the spark plug will be covered with a thick oil layer. If the valve is burnt out, the spark plug will appear normal without any major abnormalities.

Finally…

The problem of oil escaping through the breather worries many motorists and causes a lot of trouble, but with timely detection of the problem and the right approach, serious consequences can be avoided

It is important to ensure that the oil level is normal, as soon as you find that the engine is taking oil, monitor its level and constantly monitor that it does not fall below the permissible level

Also pay attention to the breather and filter; oil on the air filter in large quantities also does not bode well. Regularly monitor the condition of the engine and all systems, and also promptly correct any malfunction

This will save you from engine overhauls and unnecessary waste.

Alternative options

The next version of the improvement involves installing a hose with a small diameter into the crankcase ventilation circuit of the EPK valve of the “Cascade” model. In idle mode, the valve for standard exhaust gas outlet should be opened. Considering the fact that when installing the system in question, the supply of harmful impurities through the throttle valve stops due to the circuit opening. This is very important in the case of a transition of the engine operating mode from idle to light loads, when a lean air-fuel mixture is categorically unacceptable. Ventilation is carried out through the entire line, including the carburetor unit.

After further replacing the durite with a hose from the vacuum ignition advance device, it is reasonable to increase the diameter of the main jet of the first combustion chamber or simply reduce the input fuel flow to 4.5 mm. The scheme under consideration was tested on a model of the domestic VAZ 2101. At the same time, the following positive aspects became noticeable:

• The pedal drop during acceleration has disappeared;
• The engine's operation became smooth;
• There are no intermittent oscillations at idle.

Using the recommendations of specialists and folk craftsmen, it is possible to independently correct a number of malfunctions and shortcomings of a personal vehicle. Modification of the crankcase ventilation is appropriate for some vehicle equipment, regardless of the year of manufacture and country of manufacture. This problem is most pressing for domestic cars with carburetor engines.

Source

Conclusion

The choice of oil for the car must correspond to that recommended in the operating instructions. Replace filters in a timely manner and monitor the condition of the coolant. Be sure to warm up a cold engine, especially in winter. Do not use flushing fluids from unknown manufacturers. With this approach, the heart of your car will work for a long time and without loss of oil.

Many owners of the new Lada Priora have encountered certain problems after using them for some time. The fact that Priora “eats” engine oil has become the most common among them. Let us consider the main factors and causes of this phenomenon.

High oil consumption by a car should alert the owner, and should also be a reason to send the car for inspection.

Not long ago, the domestic auto industry was replenished with a new product. It was an improved VAZ model, namely the Lada Priora. In this model, the manufacturers seemed to have eliminated all the shortcomings and flaws made in previous models and released something worthwhile to the delight of car enthusiasts. But not everything worked out as we would like.

Replacing the crankcase ventilation valve

There are several symptoms that indicate the need to replace the ventilation valve.

Basic:

• the appearance of a whistle in the engine compartment;
• swimming XX;
• increasing the oil volume in the intercooler;
• reduction of boost pressure;
• the appearance of traces of oil on the spark plug “wells” and the area around the oil filler neck;
• dark gray smoke at idle from the exhaust pipe.

We described the issue of testing and signs of malfunction in detail above, so let’s immediately move on to the principles of replacement.

For example, here is the replacement process for a BMW X5:

1. Remove the air filter completely.
2. Unclip the air flow meter.
3. Remove the DIC damper so that it is not in the way.
4. Unscrew and remove the air duct.
5. Unscrew and remove the second section of the air duct.
6. Discard the brake vacuum tube.
7. Unscrew the throttle valve (fixed on four bolts). Also remove the connectors from the sensors to keep them out of the way.
8. Discard the breather and remove the pair of screws holding the valve in place.
9. Remove the breather (pull the tube up).
10. Dismantle the manifold to remove the outlet tube (there is no other way to get to it).
11. Remove the valve.
12. Install the new device and put everything back in place.

Please consider the following points before carrying out work:

• the space around the PCV valve must be cleaned by supplying air under pressure;
• unscrew the valve counterclockwise;
• check the dismantled element, clean it and blow it through;
• The frequency of replacement should be at least every 100,000 km.

Have spare parts ready before replacing. In particular, it is recommended to change the intake manifold and throttle valve gaskets. A new VCG valve will also be required. With the right approach, the entire work takes no more than two hours.

Cleaning on VAZ 2101-VAZ 2107

Breeding

1. Remove the air filter housing from the car engine (for more details, see the article “Replacing the air filter housing”)

The note! Be sure to remove the flame arrester from the crankcase ventilation hose and wash it with kerosene in case of severe contamination.

2. Release the clamp by attaching the additional hose to the breathing cap (marked with a red arrow) and disconnect the additional hose. Continue unscrewing the main hose clamp (marked with the blue arrow) and remove it from the cover.

3. Remove the engine oil level sensor.

4. Unscrew the bolt securing the fan cover and remove the cover from the car engine.

5. Dampen a cloth with kerosene and wipe the inside of the oil separator.

The note! Be careful when wiping; Do not allow dirt to get inside the engine. If you are not comfortable cleaning dirt from the installed oil separator, remove it from the vehicle by unscrewing the lock nut (indicated by the red arrow). Place the removed oil separator in a prepared container with kerosene.

6. Clean the surface of the air filter from dirt by wiping it with a cloth soaked in kerosene.

The note! Remove the gasket from the filter housing and clean it of dirt.

Installation

This is done in the reverse order of removal.

The note! Replace broken or cracked gaskets with new ones. Make sure the metal shims are inserted into the air filter housing gasket (shown in photo).

READ Alarm Installation Map for VAZ 21214

Important! If a large amount of kerosene gets into the crankcase, change the engine oil! (Read more in the article “Changing Engine Oil”)

For beginners! Question: What does the oil separator look like? Answer: in the photo.

Source

Welcome! The crankcase ventilation system is necessary to ensure that the atmosphere is not clogged and the exhaust gases are allowed to burn out again, this system has been implemented in many cars, from VAZ 2101 to cars such as Lada Priora, Lada Granta, etc., but when the engine is worn out, This system is removed by people themselves by removing all the PCV hoses, usually in a bottle or just outside, we will break it down in this article, so if your car has already been driven quite a lot, this article will be sent to you.

The note! We will look at cleaning the ventilation only on 16 valve engines, if you have 8 valves, then we will move on to the article: “Cleaning the crankcase ventilation on a VAZ 2114”, this engine is described in this article, you will need to clean the ventilation, crankcase 16 drain: pliers are not large , screwdrivers with different heads and all kinds of wrenches, in addition, you will need sealant for the cylinder head cover and a new gasket!

Five ways to defeat engine oil burns without major repairs

Typically, oil leaks are observed on cars that have run about 150 thousand km, but it happens that the engine begins to “sweat” on new cars due to defective or incorrectly installed sealing parts.

Accordingly, your task is to detect leak locations. Note that the most common crankshaft seals that lose their seal are the front and rear oil seals. There are also frequent cases when camshaft seals lose their tightness. Finally, the oil drain plug or oil filter may be leaking oil.

Most often, the problem is solved with little effort - replacing gaskets and seals. But if the engine is turbocharged, the turbocharger oil supply and drain pipes may leak. In this case, oil risks getting into the intake system and contaminating the piston part, as well as into the exhaust system, and then the catalytic converter will be at risk.

This solution is a half-measure, but in some cases, especially when the car is not new, and it is necessary to extend its life as much as possible without resorting to major repairs, it is quite effective. There is no point in radically increasing the viscosity.

For example, if you previously used 0W-20 or 5W-30 oils, then you can try a lubricant with a value of 5W-40. Almost immediately after changing the oil, you will feel a difference in the engine’s oil appetite.

However, the price for such a decision may be a deterioration in the starting performance of the engine, especially in severe frosts in winter. In addition, switching from synthetic oil to semi-synthetic and even mineral water can solve the problem. You just need to make sure that such lubricants meet the car manufacturer’s tolerances.

A fairly common case is when valve stem seals, also known as valve seals, wear out over time and begin to leak oil. The causes of wear may be temperature changes (for example, after the engine overheats), or engine oil that is incompatible with rubber structural elements.

It all depends on the design of your motor. In some cases, these parts can be replaced without removing the cylinder head, so you definitely won’t go broke on such repairs. However, it is often necessary to remove the camshafts, which involves disassembling the front of the engine; usually the cylinder heads also need to be removed. However, the costs of such events are still not comparable in price to major repairs. Oil consumption from such a procedure can be reduced several times.

Crankcase ventilation system

Crankcase ventilation system

: 1 - centrifugal oil separator; 2 - suction hose; 3 - flame arrester; 4 — exhaust ventilation manifold; 5 - suction pipe; 6 — gas exhaust pipe; 7 - spool; 8 — air filter; 9 — oil separator drain pipe; A - spool action when the throttle valve is closed; B - the action of the spool when the throttle valve opens.

When the engine is running, some of the gases (located in the combustion chamber under a pressure of over 40 kg/cm2) penetrate through the piston ring barrier into the crankcase. These gases contain harmful impurities that contribute to the formation of viscous substances in the lubricant and negatively affect the durability of parts. In addition, the increased pressure in the crankcase created by escaping gases causes oil to leak through the seal. To remove the so-called crankcase gases and supply clean air to the engine crankcase, a ventilation system is used. The system used on the Zhiguli is distinguished by unusual design features. The gases in the crankcase are sucked off due to the vacuum in the intake manifold through hose 2 connected to air filter 8. An inertial centrifugal oil separator 1 is installed at the inlet of this hose. The oil mist contained in the gases is thrown onto the walls of the separator, condenses and flows down the drain tube 9 into the oil pan. In the place where hose 2 enters the exhaust ventilation manifold 4, manufactured integrally with the air filter housing 8, a flame arrester 3 is installed. In the event of a backfire in the carburetor, it prevents the flame from spreading through hose 2 into the crankcase. Manifold 4 is connected (pipe 6) to the primary mixing chamber of the carburetor, as well as (pipe 5) to the internal cavity of the air filter. Due to the vacuum created in them during engine operation, gases from the crankcase are sucked into the intake pipe. From there they enter the cylinders and are partly burned along with the combustible mixture, and partly are ejected along with the exhaust gases. The gases discharged through tube 6 enter the carburetor through spool 7, which changes the flow area of ​​the tube. This is necessary because the maximum vacuum in the mixing chamber is formed when the throttle valve is closed (position “A” in the figure). In this mode, the breakthrough of gases is small and a small flow area is sufficient to suck them out. When the throttle is opened, the vacuum in the mixing chamber decreases, but the spool mechanically connected to the throttle valve increases the flow area of ​​the tube (position “B”). With further opening of the throttle, the vacuum in tube 6 continues to fall and becomes negligible. At the same time, the vacuum in the area of ​​pipe 5 increases, through which the main air suction begins; The vacuum that occurs in the crankcase is compensated by fresh air supplied into it. For this purpose, a special hose is used (not visible in the figure) running from the air filter to the upper part of the chain casing, the cavity of which communicates with the crankcase. Thus, when the engine is running, circulation constantly occurs in its crankcase - crankcase gases give way to clean air.

Source

SVKG device in Lada Priora

In all brands of cars, the SVKG is built on a similar principle. Only small details differ. On the upper side of the crankcase there is an oil separator, which looks like a hollow plug. An oil deflector is placed under the plug, which is designed to clean the gases from the crankcase as much as possible from oil particles. The oil separator has an outlet for the crankcase ventilation hose.

In order for the gases to return to the cylinder chamber, a ventilation valve is placed along their path. The valve has three modes, which allows you to maintain a certain level of gas rarefaction in the crankcase.

While the engine is idling, gases move through a small circuit hose through a special passage hole in the throttle assembly. At this time, a high vacuum is created in the intake hose, which allows crankcase gases to be effectively sucked out of the throttle block. The passage hole in the throttle regulates the amount of gases that are sucked out.

This allows you to stabilize the engine in idle mode. When the car begins to move, the throttle valve opens, causing gases from the crankcase to enter the cylinder through a large circuit hose for combustion.

Symptoms of a Stuck PCV

• Engine misfires at idle
• Lean air-fuel mixture
• Presence of engine oil in PCV valve or hose
• Increased oil consumption
• Hard engine start
• Rough, unstable engine operation at idle

Additionally, a stuck PCV valve can cause a check engine light due to increased air flow. And the diagnostic computer may mistakenly show this error due to the mass air flow sensor or oxygen sensor, making it difficult for you to identify the real source of the problem.

Article: 2112-1014056, additional articles: 2112-1014056Р

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Today, in the next article in the series “Crystal VAZs or typical breakdowns of domestic cars,” we will talk about the latest developments of the Volzhsky Automobile Plant: Lada Grante and Lada Largus. Let's talk about the history of the creation of these models, as well as their characteristic malfunctions.

Engine crankcase ventilation

Crankcase ventilation is designed to remove crankcase gases resulting from the breakthrough of fuel combustion products through the gaps between the liner and piston rings and their interaction with oil vapor.

The gases contain sulfur compounds and water vapor that pollute the oil, which form sulfuric and sulfurous acids, which significantly deteriorate the quality of the oil. Water vapor causes the oil to foam and form an emulsion, which makes it difficult for oil to reach the rubbing surfaces. Gases escaping into the crankcase increase its pressure, which can cause oil leakage through the crankcase seals.

It is also unacceptable for gases to penetrate under the engine hood, and then into the body and cabin of the car, since the harmful substances contained in the gases are dangerous for passengers and the driver. Suction of crankcase gases reduces oil aging, and also, by creating a vacuum in the pan, prevents the possibility of oil leakage through the seals.

There are two types of crankcase ventilation used in automobile engines:

• open – with crankcase gases vented into the environment;
• closed - with gases being sucked into the engine intake system.

Open ventilation (Fig. 1) is carried out under the influence of vacuum that occurs in the exhaust pipe due to the relative movement of air when the car is moving. To prevent oil particles from being carried away along with crankcase gases, a special labyrinth-type breather is used, on the walls of which oil drops settle and flow into the pan.

The disadvantage of an open crankcase ventilation system is its low efficiency, as well as the poisoning of the environment with substances harmful to human health and wildlife.

In closed systems, gases may be vented into the air cleaner before the carburetor or directly into the intake manifold. Gas removal through the air cleaner does not create the required suction intensity at minimum crankshaft speeds and full load. In addition, the passage of crankcase gases through the carburetor causes tarring of its channels, jets and moving parts. Therefore, a system with gas suction directly into the engine intake manifold, in which there is always a vacuum, is more preferable.

The ventilation system shown in Fig. 2, works as follows: under the influence of vacuum in the intake pipe 10, crankcase gases rise upward and through the elbow 9 and hose 5 enter the oil separator housing, closed by a lid 1. Between the lid and the housing there is a rubber membrane 2, pressed by a spring 3 to the housing. Oil particles settling at the bottom of the oil separator housing are drained through tube 6 into the engine crankcase.

Using membrane 2, which is located on one side under atmospheric air pressure, and on the other under the pressure of crankcase gases and springs, excess pressure is maintained in the crankcase.

In Fig. Figure 3 shows a diagram of the crankcase ventilation of a carburetor engine of VAZ cars. Here, crankcase gases are sucked through the oil separator 7 and hose 6 into the exhaust manifold 4 of air filter 3. From the exhaust manifold at idle and at low engine loads (when the vacuum in the air filter is low), crankcase gases flow through hose 2 and spool 1 under the carburetor throttle valves .

In other engine operating modes, crankcase gases enter the carburetor through air filter 3. Oil is released in oil separator 7 and flows through outlet tube 8 into the oil pan. Flame arrestor 5 prevents flame from penetrating into the engine crankcase during possible flare-ups in the carburetor.

Source

Oil in pipe

Check the condition of the oil scraper rings. When the engine operates for a long time, especially under increased loads and slipping, soot accumulates on the rings. The use of various additives can also give this result. Compression rings burn out and stick in the grooves. The internal pressure increases, and oil leaks appear on the pipe inside and even outside. In this case, everything needs to be cleaned and the seals replaced.

Check for the presence of an oil trap in the corrugation. It looks like a set of thin plates or maybe a version of small meshes. In the off-season, the draft in the pipe worsens when you put the lid in the winter position in warm weather and vice versa. To eliminate this drawback, you can install an additional oil separator from Opel, the price of which is around 500 rubles and it works well on a VAZ.

Compression

A thin tube extends from the outlet pipe closer to the crankcase. It has an internal diameter of about a millimeter and clogs quickly. Clean it, then do not connect it, but put your finger on it at idle. You should feel how it is attracted by the rarefied air. If this does not happen, then you need to adjust the engine valve stroke.

The adjustment instructions are complex and require special tools and skills to carry out this work. It is difficult for an amateur to cope with such a task on his own. Therefore, it is better to remove oil in the VAZ 2112 air filter by adjusting the compression, preferably in a specialized workshop. You can find a related video, but it won't answer all your questions.

How often should cleaning be performed?

If the ventilation system is clogged and its filter is unable to clean the mixture passing through it, then not only unburned gases, but also oil particles and other pollutants will enter the engine. All this will ultimately have a negative impact on both the operation of the engine and its remaining service life.

The frequency with which the crankcase ventilation of the VAZ 2114 should be cleaned directly depends on the condition of the engine. So, if the car just recently came off the assembly line, and its engine has not clocked up 50,000 km, you shouldn’t even think about cleaning it, since the piston rings are still new, and there is practically no leakage of gases through them.

Valve cover of VAZ 2114 engine

The first cleaning (as recommended by AvtoVAZ itself) should be performed after the car has covered 60,000 km. And all subsequent cleanings should also be performed after every 60,000 km.

Oil in the Priora corrugation. Why is there oil in the air filter pleat?

Why is there oil in the air filter corrugation, VAZ 2112?. Oil in the Priora corrugation.

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27 comments on “Oil in the Priora corrugation. Why is there oil in the air filter pleat”

Because the crankcase gas hose is connected to this corrugation

Throw the hose down and hammer it in.

Throw the hose down, but the hole in the air corrugation needs to be plugged.

Oil to removable caps or rings. If the solution is simple, then you can run the hose down and drive.

Fuck all the internet smart guys

You just need to clean the crankcase ventilation and everything will be fine.

It's located in the valve cover

What if it doesn’t work?? What do you recommend next, smart guy?

Damask steel, breather mesh Krch

The breather mesh won't help. The rings are screwed up. In principle, there's nothing terrible about it.

Dinar, it’s not a big deal at all, it’s just that the oil will get on the mass air flow sensor and destroy it, and that’s nonsense.((

Operating principle of SVKG

Car engines have a ring gas exhaust system. The resulting gases as a result of the combustion of diesel fuel, gasoline or liquefied gas are not released into the environment, but are returned to the engine, where they are re-burned. The second end of the crankcase ventilation hose is attached to the intake manifold, with the help of which gases again enter the cylinder chamber for combustion. A significant part of the gases, when re-entered, ignite at the moment the fuel ignites, and the remaining ones are released into the atmosphere using the exhaust system. A small percentage of the gases are sent back into the cylinder chamber for re-combustion. This process is ongoing.