Why squeezed out oil. Why oil flows from under the filter and engine

During the operation of the vehicle, many motorists notice an oil leak from under the oil filter. This problem can be relevant both for owners of fairly old cars with high mileage, and for relatively new ones.

In the first case, oil flows in the area of ​​\u200b\u200bthe oil filter due to the fact that it may not have a pressure reducing valve that does not allow excess pressure in the system. Most often, the problem manifests itself after a cold start in the winter, when the oil thickens in the crankcase of the power unit. Thick lubricant simply does not have time to pass through the filter, resulting in oil being squeezed out.

As for modern motors, leaks for this reason are normally not allowed, since the presence of an overpressure relief valve in the design of modern systems eliminates this possibility. For this reason, oil leakage from under the oil filter housing is a malfunction and becomes a reason for diagnosing the power unit.

In this article, we will talk about the reasons why oil flows from the oil filter, what to do if an oil leak is detected from under the oil filter cover or housing, and how to fix it.

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Why oil flows from under the oil filter

To begin with, the list of reasons why oil is squeezed out in the oil filter area is quite wide. Most often, the culprit is the owner himself, who has not changed the oil filter for a long time.

• Contamination of the oil filter under certain conditions can lead to the fact that the throughput is greatly reduced, the lubricant practically does not pass through the filter media. At the same time, to protect against oil starvation of the engine, the filter design usually has a special bypass valve (allows the oil to bypass the filter element), but it is impossible to exclude the possibility of failures during its operation.

In the event that the purity and "freshness" of the filter is beyond doubt, then errors could have been made during its installation. If a leak appeared immediately after replacing the filter, it is quite possible that the filter itself is not tightened enough or the housing is not twisted (in the case of a collapsible design). This indicates the need for tightening. This procedure is carried out by hand or using a special plastic key-puller.

A prerequisite can be considered the absence of force when twisting, since constriction leads to breaks in the sealing gum and deformation of the sealing ring. If this happens, the filter must be replaced with a new one or the problem solved by replacing the damaged seal.

We add that very often during installation, car owners and mechanics forget to lubricate the above rubber sealing ring on the oil filter housing with engine oil. This leads to the fact that after the filter is twisted, its loose fit is possible, the seal can be deformed or placed skewed.

In any case, the oil filter must be removed, the integrity of the seal checked, the rubber band lubricated and the filter element installed in place, taking into account the features of its installation. It should also be remembered that a defective oil filter may come across on sale. In such a situation, the housing itself may be defective, on which there are cracks, the seal may be made of low-quality rubber, the valve in the filter does not work, etc.

• High engine oil pressure is the second most common cause of oil leaks in the oil filter area. An increase in pressure in the lubrication system can occur for various reasons, ranging from significant thickening of the lubricant in conjunction with an excess oil level, to certain mechanical failures.

Let's start with the bypass valve. The specified valve is necessary to relieve oil pressure in case of exceeding the specified value. The valve can be located in the area of ​​the filter holder, as well as on the oil pump itself (depending on the design features). To check, you need to get to the valve and evaluate its performance.

Jamming in the closed position results in the element not working. In this case, the device must be cleaned and washed. For cleaning, gasoline, carburetor flush, kerosene, etc. are suitable. Note that, as practice shows, it is better to replace the wedged valve when possible, especially given its relatively affordable price.

• Another reason for leaks associated with the oil filter is the problem with the threads on the fitting where the filter is screwed on. If the threads are broken or damaged, then the filter housing cannot be properly tightened during installation, as a result, oil will be squeezed out. In such a situation, it is necessary to change the fitting or cut a new thread.

It is also worth highlighting that if, that is, it becomes too liquid or viscous, then leaks often occur in the area of ​​gaskets and seals. The oil filter is no exception. The lubricant should be selected in accordance with the requirements of the vehicle manufacturer, and also take into account the features and operating conditions.

Note that if the driver constantly uses the same type of oil, the filter is not dirty, there have been no significant changes in weather conditions, and there are no obvious engine malfunctions, then the fact of pouring fake engine oil into the engine may take place. It turns out that poor-quality grease simply does not have the declared properties, as a result of which leaks appear.

The way out in this situation is obvious - an immediate replacement of the filter and lubricant is necessary, and an additional one may also be needed. Finally, we add that the blockage of the pipes of the crankcase ventilation system leads to the fact that gases accumulate inside the internal combustion engine, pressure increases inside the engine and the oil is squeezed out through the gaskets and seals. The specified crankcase ventilation system must be checked during the diagnostic process, and also periodically cleaned for preventive purposes.

How to fix an oil filter leak

So, in most cases, it is enough to fill in high-quality oil, taking into account the manufacturer's recommendations and seasonality, to change or install the oil filter correctly.

With basic skills, it is quite possible to cope with cleaning the crankcase ventilation system. This means that in most cases, practically every driver in a garage can fix an oil leak with his own hands.

As for more complex malfunctions, these include a failed pressure reducing valve and a damaged thread on the fitting for fixing the oil filter. In practice, the problem with the valve is more common, so let's separately focus on checking it.

The main task is to check the valve spring, which is located under the plug. It is she who is responsible for the operation of the device, the overall performance will depend on the state of the spring. The specified spring must be removed from the socket for inspection. The presence of scuffs, creases, bends and other defects is not allowed. Also, the spring should be tight, not loose.

If the spring can be easily stretched by hand, this indicates a weakening of this element. Also, the overall length of the spring should not be increased, indicating stretch. A decrease in length is an indication that part of the spring has broken off. In such a situation, debris must also be removed from the valve seat. Finding any defects in the spring is a reason to replace it.

Summing up

A decrease in compression in the cylinders will indicate a possible breakthrough of gases from the combustion chamber and an increase in pressure in the crankcase. The readings of the liquid pressure gauge will help to quickly determine pressure deviations in the lubrication system, if any.

Finally, we add that if oil is squeezed out from under the oil filter during start-ups or the lubricant is constantly flowing, while the engine is working and the pressure in the lubrication system is normal, and the filter itself is correctly installed and securely fixed, then the reason may be the low quality of the filter itself. In this case, before an in-depth check of the internal combustion engine, it is better to first change the filter to a proven product from a well-known manufacturer.

Read also

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Why oil flows from under the gasket or valve cover housing: causes of lubricant leaks. How to remove oil leaks from under the valve cover.

During the operation of the car, car owners often encounter trouble in the form of a leak from under the oil filter. The resulting puddle under the car is an unpleasant situation and exciting for the driver. An oil leak in the filter area does not bode well, as it hides a number of adverse factors. This problem can occur both in a used car and in almost new ICEs.

Causes of high pressure in the filtration system

Some experienced drivers solve this issue by tightening the filter housing, as they believe that a similar problem occurs as a result of:

• valve malfunctions;
• inconsistencies in the viscosity of the lubricating fluid;
• low-quality polymer seal.

Also, the cause may be a weak fixation of the filtrate on the fitting or its contamination.

Conditions for the occurrence of such cases

The main mistake of drivers, as a result of which oil is squeezed out through the oil filter, is considered to be a cold start of the engine at high speeds. This is especially common with used cars. This is absolutely not necessary, since oil compositions, especially of mineral origin, thicken in the cold and become like jelly.

The pump generates high pressure at high speeds and can force lubricant through any leaks. In addition, in this mode, damage to the oil seals on the crankshaft is possible, and this is fraught with repairs and unplanned expenses.

If you often encounter frost, it is recommended to change the previous composition to oil with a viscosity of 0w20 and a filter with a spring mechanism.

Another well-known mistake, due to which oil is squeezed out from under the oil filter, is the use of fast-acting substances that can restore contact between rubbing parts in a short time. It is worth considering that the use of components is considered by the system as garbage and it will settle on the filtrate, interfering with the movement of the oil flow and, as a result, the lubricant is squeezed out through the seals.

There are several other important situations where a squeezing effect through the oil filtrate may occur:

1. During an oil change, it is not recommended to save on flushing materials and use the "old-fashioned" methods of flushing the lubrication system, namely mixing unsafe compounds in the form of kerosene with acetone or benzene. Such connections, or rather part of them, will forever remain in the system, and this causes deformation of the seals.
2. The usual topping up of the lubricant in the previous composition. This habit is detrimental to some drivers who ride on the same oil for a long time. As a result of this action, a huge amount of undesirable impurities accumulate in the lubricant mixture.
3. Poor quality consumables. The use of surrogates instead of conventional oil with poor quality characteristics.

Fake, and only

The fuel and lubricants market is already full of low-quality products. Therefore, falling for the bait of unscrupulous sellers is easy. There are several distinguishing features by which you can determine if the material is fake or not.

The first parameter of a low-quality oil filter is the packaging geometry. If the body is deformed, then this is one of the signs of falsification. You can also check the quality properties of the filtrate in another simple way, namely by blowing into the inlets. If the product is of high quality, then the petal should not open, but, in a fake, the opposite is true.

It is worth paying attention to the polymer sealing ring and monitoring the condition of the filter paper. If an accordion made of paper has irregularities or a difference in color, then this is a fake. As for the polymer ring, its height should not exceed 0.8 mm above the level of the cover.

The problem of squeezing out the oil filter is relevant for many owners of domestic vehicles. This leads to a lack of lubricating fluid in the engine and may affect its functionality as a whole. Why the oil filter squeezes out on the VAZ 2109 and what to do in such cases, we will describe below.

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Problem Diagnosis

To understand why the oil filter is squeezed out on the VAZ 2109, it is necessary to check the malfunction. Let's consider two diagnostic options.

You can learn about the features of measuring this parameter from the video published by Sandro's In Garage channel.

Measure compression in the engine

How to properly check the pressure in the cylinders of the power unit:

1. Before starting the engine and diagnosing the level of pressure in the cylinders, check the clearances in the valves. If necessary, adjust them.
2. Start the engine and warm it up to operating temperature.
3. Turn off the power unit, disconnect the high voltage wires and unscrew the spark plugs, for this you will need a special key. Be careful when unscrewing as the spark plugs will be hot. It is advisable to use gloves to perform the work.
4. Disconnect the fuel line fitting to prevent fuel from entering the system.
5. Disconnect the center wire connected to the ignition coil.
6. Directly to diagnose compression, you will need a compression gauge. Install the hose from the appliance into the spark plug socket. Compression diagnostics are performed separately for each cylinder. Start checking from the first one. You will need an assistant to complete the task. When you perform diagnostics, the assistant should turn the starter device while pressing the gas pedal. During the test, the instrument will display the results.
7. All values ​​obtained during the test are written to the sheet. With the correct operation of the power unit, the obtained indicators will be 10 kg / cm2. It is important that the obtained indicators in all cylinders differ from each other by no more than 1 kg / cm2. If the diagnostics showed that in one or more cylinders the pressure level is higher, the cause of the problem is the insufficient fit of the valves to the seats. The problem may be increased wear on the compression rings or a leak in the cylinder head gasket. It could wear out or be damaged during operation. If the pressure level is too low, an oil filter diagnosis or repair of the power unit is required. It is necessary to pay attention to the diagnosis of valves, perform their grinding, check the condition of the cylinder head gasket or change the piston rings.

Main causes and solutions

Next, we will talk about the reasons for squeezing out oil when the engine is running. If the motor lubricant in a VAZ 2109, 2110, 2114 car or in another model goes into frost or heat, the problem must be solved faster. To do this, you need to determine the reason.

Filter clogging

If the lubricant presses, the oil filter may have leaked. As a result of contamination of the device, its throughput drops significantly, due to which the consumable cannot pass through it. In this case, to prevent oil starvation of the power unit, the design of the filter element has a bypass valve. With it, motor fluid can bypass the device itself. However, it is still impossible to exclude the possibility of failures in its functioning.

Remedy

The first thing to do is to dismantle and clean the filter device. Since its contamination is usually associated with the presence of dirt in the engine fluid, the consumable itself should also be replaced. Be careful and wear gloves as the oil is very hot.

Brief instructions on how to drain and fill in new engine fluid:

1. Start the power unit and let it warm up to operating temperature.
2. Open the hood and unscrew the filler cap. This will reduce the pressure in the lubrication system. Get under the bottom of the vehicle and find the drain plug. Substitute a container under it into which you will drain the consumables. It can be an old bucket, a basin or a cut bottle.
3. Loosen the drain plug with a wrench of the appropriate size.
4. After draining the liquid, tighten the drain plug. Assess the quality of the motor fluid. If it contains traces of dirt and deposits, then perform. To do this, fill the engine with flushing fluid, start it and wait about ten minutes. Times may vary, so be sure to read label instructions before rinsing.
5. Fill the engine with new oil.

Errors during filter installation

If lubricant leaks after replacing the engine fluid, the reason may be that the rubber of the filter device has been squeezed out. This is often due to incorrect element installation.

Remedy

The troubleshooting option depends on the complexity of the problem. Sometimes it is necessary to dismantle and reinstall the filter. If the gum is badly damaged, then the filter must be replaced.

To do this, do the following:

1. Open the hood and find where the device is installed.
2. To eliminate leakage, unscrew the filter element. If the gum is stuck, then it may be difficult to dismantle. If it is impossible to unscrew the filter device with your own hands, pierce it with a screwdriver closer to the bottom (reverse thread).
3. Before installing a new filter, pour a little engine oil into the device, about 50-100 grams.
4. Install the element in place.

A detailed video on the replacement of lubricants, as well as filtering devices, is presented by the KBL TV channel.

Increased oil pressure

Sometimes fluid flows due to increased pressure in the cylinders of the power unit. This reason is considered one of the most common and it may be a strong thickening of the lubricating fluid or other mechanical malfunctions.

Remedy

Diagnose the bypass valve. This device is used to reduce the pressure of the consumable when this parameter is increased. Depending on the design features of the car, the valve can be mounted in the area of ​​​​the filter device holder or directly on the oil pump. To diagnose, you need to get to the part.

If the valve is stuck in the closed position, then it will not work. Then you need to clean the device; fuel or kerosene is suitable for this task. You can use a special tool for cleaning carburetors. In practice, the most effective option would be to replace the valve.

Broken or damaged thread on the fitting

Sometimes engine fluid leaks as a result of damage to the fitting. This is a leak from under the thread of the filter device. As a result, during installation it is not possible to tighten the filter, due to which the consumable is squeezed out.

Remedy

There are several troubleshooting options:

1. Replace the fitting directly.
2. Make a new thread, that is, cut it. Without the help of specialists in this matter, it will not work.

Information on how to replace the fitting is given in the video made public and filmed by the user Alexander Skripchenko.

Oil quality

One of the reasons why the oil filter squeezes out on the VAZ 2109 is the quality of the consumable used. Leakage may be due to incorrect selection of consumables. Because of this, during operation, the lubricant may become too viscous or greasy, which leads to extrusion of the substance in the area of ​​\u200b\u200bthe sealing components and gaskets. To prevent problems, the lubricant must be selected, taking into account the requirements of the automotive manufacturer. You can read more about this in the service manual.

With regular use of the same type of lubricant and the absence of dirt in the filter device, the problem may be due to the use of counterfeit lubricant. Provided that there are no malfunctions in the operation of the power unit. Poor-quality engine oil does not have the declared characteristics, which leads to lubricant leakage.

Remedy

The only option that will fix the problem is to replace the engine fluid and filter device. When changing the oil, the filter must be changed. It is also advisable to flush the power unit to remove deposits that have formed in the system. Due to poor-quality fluid, exhaust gases will begin to accumulate in the engine itself, which contributes to an increase in pressure in the system and extrusion of consumables through the sealing elements. When performing a check, it is necessary to diagnose and ventilation systems. Experts recommend cleaning it.

1. Unscrewing the drain plug 2. Draining the used fluid from the engine 3. Dismantling the filter device 4. Filling new fluid into the car engine

Cold start

If the lubricant runs out from under the filter at the time the power unit is started, this is due to the design of the oil pump. The device does not have a consumable pressure relief valve. If there is no external valve, this parameter is increased. Or is it due to a defective part.

Remedy

As the engine warms up, engine fluid will no longer be squeezed out from under the filter. But it will not be possible to solve the problem by heating up to operating temperature alone, since leakage will occur constantly. It is necessary to diagnose the pumping device, as well as valves.

What to do if squeezed out oil in the cold?

The flow of liquid in the car during frost is associated with the use of low-quality consumables. At low negative temperatures, the oil loses its properties and cannot fulfill its duties. You can solve the problem by replacing the consumable fluid with a new one. It is advisable to use a different oil. And you should choose a more viscous liquid.

Pressure reducing valve replacement

If the quality of the consumable is normal, and the filtering device is working, the reason must be sought in the performance of the pressure reducing valve.

You can carry out work on replacing parts yourself.

What will be needed?

For repairs, prepare a set of wrenches, as well as rags.

Stages

The replacement is done like this:

1. Remove the timing cover.
2. Find the bypass valve, you need to unscrew the plug from it. Use a wrench to unscrew.
3. Remove the spring from the access hole. It is used to control the operation of the device. If the spring is intact, then the excess pressure in the system is released. Examine the integrity of the device. If it is working, then it should not have scuff marks and other types of defects.
4. Pay attention to the coils. In a workable spring, they are tight. If it can be stretched with your fingers, then the metal is already weak.
5. Measure the height of the device. It is 44.72 mm. If the height is less, then part of the device is broken off. Remove the spring fragment from the mounting hole and replace the spring.

Sometimes some car owners are worried about one important problem: why oil squeezes out and flows from under the oil filter. We will not consider the situation with old, almost obsolete machines, on which there is an oil pump that is not equipped with a bypass valve.

They have such a leak - an ordinary situation when starting the engine in the winter months. The phenomenon is due to the fact that the lubricant thickens so much in the cold that it does not have time to pass through the oil filter.

However, the owners of such specimens are well aware of the details and do not worry about such a punching. Experienced drivers even have a saying: if oil does not flow from somewhere in the VAZ classic, then something is wrong with the car! On modern models, this phenomenon is in principle impossible due to new designs in the form of an overpressure relief valve. Therefore, a leak in the filter area is naturally perceived as a wake-up call.

Why squeezes and flows oil from under the oil filter, there can be many reasons. The main ones, as well as elimination methods, we will consider in our next article.

Causes of leaks and how to deal with them

The most common is an elementary dirty oil filter. It is so clogged that oil cannot seep through it. So before you go deeper, remember when you changed it. If you are sure that the filter is clean, look for a harmful factor among those listed below.

If the filter was changed recently and soon began to leak, most likely, the rubber seal was not lubricated during its installation. When the filter barrier was twisted, it warped, and maybe deformed. The part is removed; if the gum is still twisted, it changes, if it is simply skewed, it is lubricated, and the knot is assembled back.

A leak that appeared immediately after changing the filter indicates that it is not tight enough in place. It needs to be screwed in all the way. Attention! This is done manually, without the participation of any tools whatsoever. Otherwise, you will get a rupture of the seal and the resumption of leakage.

And do not forget about the oil according to the season and the manufacturer's recommendations. If you use the same one, and the leak appeared after changing the oil, it is likely that you slipped a fake.

pressure reducing valve

In most cases, if the oil is in order and there are no complaints against the filter, it is he who is the culprit. We considered this option in paragraph 5 (the bypass and pressure reducing valve are the same). If he turns out to be the culprit, then the visit to the service station can be postponed: checking and replacing it are available for independent execution. All you need is a set of keys and old rags.

• The timing belt cover is dismantled;
• A plug is screwed from the bypass valve;
• The spring comes out of the socket. It is responsible for the operation of the valve, and its integrity ensures the release of excess pressure;
• The spring is carefully studied. It should not have scuffs or other damage. Creases and kinks are also not allowed;
• The coils must be tight; if the spring is easily stretched by the fingers, metal fatigue is evident. The height of the element must be strictly equal to 44.72 mm. A lower indicator indicates that part of the spring is broken off for some reason. In this case, take the trouble to remove the chip from the nest so that it does not spoil your picture in the future. If the spring is out of specification, it must be replaced.

In principle, there are no other reasons why oil squeezes out and flows from under the oil filter in nature. If the bypass valve is in order, the filter is installed correctly, the seal is lubricated and intact, and the oil continues to push through, consider changing the manufacturer of the filter element: this is most often the result of poor quality.

There can be several reasons why oil is escaping from under the filter. Most often this happens in older cars, which is due to the design of the oil pump. In older cars, the pump does not have a bypass valve, which is why the lubricant leaks.

In older cars, oil usually flows when the engine is started in a cold state. Because when the engine is cold, the engine oil acquires a high density and the appropriate consistency, which is why the filter simply does not have time to pass the required amount.

But it is worth noting that in modern car brands that provide for a bypass valve, there are no problems due to the thicker consistency of the oil, so there may be other reasons.

Among the main reasons why oil is driven from under the filter are the following:

• Deformation of the oil barrier gum;
• Under-rotated filter;
• The filter is over tightened;
• Damage to the barrier surface;
• Increased oil pressure in the engine;
• Cold motor;
• Filter contamination;
• Damage to the reduction autovalve;

Troubleshooting

1. Elastic band deformation

Sometimes, when installing the oil filter rubber, he forgets to lubricate it separately, which causes it to deform during installation, and, for example, it can warp. If this happens, then the filter barrier should be removed, and lubricants should be applied to the gum. After that, you need to re-install it in place.
If the deformation of the gasket cannot be corrected, then it is better to replace it.

2. Under-rotated filter

During the next lubricant change, when installing the oil filter, it may not be tightened, which is why oil also sometimes flows. To fix this and remove the leak, you need to use your hands, without using any other means, so as not to damage it, just screw the filter all the way.

3. Filter overstretched

This problem occurs if the filter is tightened too tightly during the next relubrication. In such cases, it is advised to remove the filter in order to assess the condition of the gasket - if the gum is damaged, it must be replaced with another one. After that, the filter is installed in place, as in the previous case, without much effort - they are twisted by hand until it stops.

4. Damage to the barrier surface

Oil also drives under the rubber bands of the filter in the event that the mating surface of the barrier itself on the motor was damaged, the ebb, which is directly adjacent to the rubber band, must have a flat surface, otherwise it should be replaced.

5. Increased oil pressure in the engine

Oil pressure can be excessive for a variety of reasons. As a rule, then you have to replace the lubricant with a better one or look for another barrier. In the first case, this may be caused by poor-quality additives, due to which a large amount of gases from the burnout of the lubricating fluid accumulate in the system, and ventilation does not have time to remove them. In this case, you first need to find the cause of the increase in pressure, and then proceed with the repair.

6. Cold motor

When oil is driven due to a cold engine, then the problem is most likely in the internal structure of the car. This reason has already been discussed above. Since older cars most often do not have a valve for regulating the lubrication pressure, changing it (pressure) can lead to oil leakage. In this case, most likely, the car does not have an automatic valve installed on the outside, and if it does, then it may be worth checking for serviceability. In order to avoid further leaks, it is worth warming up the engine and inspecting the valves and oil filter.

7. Filter clogging

All you need to do in this case is just replace the filter. It is also worth calculating the force so as not to deform the rubber gasket - you should not use a key for this. It is enough to screw the filter tightly by hand.

8. Damage to the pressure reducing valve

Because of this, oil usually drives when the lubricant and filter element are in a satisfactory condition, and the leak continues. To eliminate the leak, first remove the valve without removing the pump, using rags and keys. Remove the timing belt cover, unscrew the valve plug, removing the spring. The valve is removed, inspecting for damage and scoring. Sometimes it is necessary to replace the spring if a kink is found or the nominal height (44.72 mm) differs from the actual one.