Squeezes oil from under the grant oil filter. Why is oil squeezing and flowing from under the oil filter? What to do in this situation

11.10.2019

Brake system

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.

The main reason why oil is squeezed out from under the filter, as a rule, is one, is the start of a cold engine. At this point, the consistency of the lubricant is so thick that it simply does not have time to pass through the oil filter.

This usually happens on older vehicles that have an oil pump that does not include a bypass valve. With new cars, this certainly cannot happen, well, perhaps, if it is not twisted well enough, and then it presses the oil from under the filter.

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The main causes and ways to eliminate them

There can be many reasons for oil leakage, there can be several main ones, and we will analyze them:

Malfunction	Remedy
During installation, they forgot to lubricate the rubber of the oil filter barrier and it warped or deformed during twisting	Remove the barrier, lubricate the rubber band and reinstall
Oil filter turned off after replacement	Tighten to the stop, but only by hand without the use of tools
Leaking due to the fact that the oil filter is pulled during the replacement	Remove the barrier, if the gum is deformed - replace it and install it with a new one, without applying undue force
Damage to the mating surface of the barrier (the surface of the ebb on the motor in contact with the rubber)	Replace barrier
High oil pressure in the motor	There are many reasons, oil change or barrier may need to be changed
Unheated car. On older models, oil pumps are installed in which there is no oil pressure relief valve, in case of excessive increase, and the external autovalve is either not installed or is faulty	Warm up the car, inspect the pump and valves
Dirty filter element	Replace barrier. When changing the filter, twist it only by hand. Just tighten it well. Because if you twist with a key, there is a risk of squeezing out the gum - and a leak will appear again.

If everything is in order with the lubricant and filter, but the oil is squeezed through again, then the pump itself, namely the pressure reducing valve, may be faulty.

We fix the problem

The valve can be removed without removing the pump itself.

What will be needed?

a set of keys;
rag.

Stages

Remove the timing belt cover.
We unscrew the plug of the autovalve.
We take out the spring.
We take out the valve and check it for scoring and mechanical damage.
Check the condition of the spring itself. It should not have any kinks, and the height should be 44.72 millimeters, otherwise replace it.

We have listed almost all possible reasons why grease is leaking, if after that the problem is not resolved, then you should seek help from professionals at a service station. It is possible that they will be able to find something else and fix the leak.

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.

Read in this article

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.

Signs and causes of a leak

To deal with the problem, you need to know about its causes and symptoms. By what signs to determine that oil is flowing from the engine? An engine fluid leak is sometimes caused by clutch slippage. If engine fluid gets on the intake manifold or exhaust pipe, you will smell bad odors or see blue smoke coming from under the hood.

After the night, pay attention to the place where your vehicle was parked. Oil stains under the motor may indicate that oil has leaked out of it and the problem needs to be addressed. The main symptom is the nature of the oil stain. It will be either yellow or dark, and in appearance it will be a slippery and greasy stain.

In addition, another sign that fluid is flowing from the engine is its insufficient level. If the oil is completely squeezed out on the go or it leaves the engine in the parking lot, then, of course, the level will be the lowest. Therefore, drivers are advised to check the engine fluid level before each operation of the vehicle. In addition, the instrument panel may indicate this problem. If the oil level is low and it has partially leaked out, you will see a characteristic engine fluid shortage icon on the dashboard.

As for the reasons, they are discussed below:

There was a breakdown of the intake manifold control system.
Lack of tightness of the engine fluid level sensor - if a leak is observed in the area of \u200b\u200bthe sensor.
Leakage of the filter element - if the liquid flows into the oil filter area.
Leaking motor seals.
The system is flooded with the wrong MM. Sometimes car owners do not take into account the recommendations of the auto manufacturer regarding the choice of consumables. Of course, this should not be ignored. The liquid should be filled only with the one indicated by the manufacturer, since this is very important. the performance of the consumable is affected by the additive package, chemical composition, and viscosity properties. Elements contained in the wrong oil can corrode the rubber components of the injection system, which can cause the MM to completely leak out of the machine.
Overflow of liquid. If you have poured too much consumable material into the engine, this may cause the MM working pressure to increase. As a result of increased pressure, the load level will also increase on the sealing elements along with the seals. Accordingly, this can lead to the destruction of the structure.
Transport has not been used for a long time. If within twenty days the engine of your car does not heat up, then the liquid may drain into the oil pan, and all the sealing elements along with the seals will begin to dry out due to downtime.
Insufficient crankcase ventilation. Every motorist knows that exhaust gases enter the crankcase through pistons. Piston ports will allow more gases to pass through if the engine is old enough. When these gases collect in the crankcase, excessive pressure is created in the system. The ventilation system should reduce this pressure, but if its channels are clogged, then there can be no talk of any pressure reduction. Accordingly, the pressure will squeeze out the consumable.
. This sealing element can be damaged anywhere, which will cause fluid to escape. However, if the gasket is broken, this does not mean that the liquid will come out exactly. It can also leak into the cooling system if the part located between the cylinders and the cooling system is broken. In this case, everything can be understood by the color of the antifreeze - it will be more cloudy. In addition, the machine will lose power, the coolant will constantly foam, and the engine will regularly overheat.

How to fix the problem?

We figured out why the fluid leaves the engine, now let's talk about how to solve this problem. Solutions to the most common problems will be discussed below. In all these cases, you will need a set of wrenches and a quality sealant.

If the valve cover is leaking

If the oil has leaked out for this reason, then the problem can be completely solved on your own. This problem is one of the most common. To solve it, you need:

Open the hood and remove the valve cover.
Rinse it with acetone or kerosene, thoroughly wash all traces of drips so that you can determine the result of the work.
Take the sealant and lubricate the cover gasket well so that it fits snugly against it.
After that, mount the cover in place and make a control trip. Check the result.

Leakage of consumables from under the valve cover

If it leaks from under the oil filter

Remove the filter element if oil has leaked out from behind it.
Assess visually its condition. It may have visible signs of mechanical damage or it may have been punctured, resulting in a consumable leak.
If the filter really looks bad, then you should change it to a new one.
If everything is in order with the filter, then dismantle it and lubricate the rubber part of the element with a drop of MM, then install it in place. Tighten it tight - usually after that the problem disappears.

If a leak from under the distributor

Open the hood and remove the distributor cover. Mark or remember the location of the slider so that you can set it correctly later.
Using a wrench, unscrew the fastening screws and dismantle the distributor itself.
Take the sealant and coat the installation site of the device.
Install the distributor to the installation site by setting the slider.

If there is a problem with the crankcase

Leaking car pan

Sometimes, if oil has leaked from the engine due to a crankcase leak, installing protection will help solve this problem. For this you will need:

Dismantle the pallet by unscrewing the screws securing it with a wrench.
If the pallet is visible due to mechanical damage, then they must be eliminated.
Take a new pan gasket and coat it with sealant just in case.
Install the tray in place by tightening all the fastening screws.

Video "What to do in case of leakage of consumables"

You can learn how to solve the problem of leakage of consumables in this video.

An article about oil leaks from a car engine - causes, consequences, ways to fix the problem. At the end of the article - a video on how to determine where the oil is flowing from.

Varieties of leakage

If the leak marks you find under the bottom of the car look greasy and dirty brown or yellow in color, then it's probably an oil leak from the engine. And with a pinkish or reddish tint to the flowing liquid, we can conclude that this is antifreeze leaving the automatic transmission.

Consequences of an oil leak

Oil lubrication for a car is like blood for a biological organism, because it is the lubrication that ensures the engine's performance. Based on this fact, in no case should you turn a blind eye to an oil leak, otherwise it will lead to engine blockages, failure and even fire.

Another dangerous consequence of oil leakage lies in the possible damage to the motor due to lack or lack of lubrication during operation. In addition, for the same reason, the clutch may slip.

Solving such problems on your own is often either difficult or impossible at all, and then it will be more reliable to contact a car service.

How to find a leak

A visual sign warning of a leak should be considered the appearance of a bluish haze from under the hood, as well as jerks on the oil indicator when the car is moving.

But in order to specifically identify the leakage of oil, you first need to check its level. Do this with a special probe. It must be removed, wiped dry with a clean rag to such an extent that you can see the mark. After that, dip to the end and then remove.

This way you can determine the level of lubrication. And, if it turns out to be less than normal, then oil should be added. And after adding, start monitoring its level every thirty minutes. If it falls very rapidly, it means that the oil pan is damaged.

The next way to find a leak is - use of fluorescent dye and ultraviolet light. To this end, dissolve the dye in the oil and pour the resulting mixture into the motor. Next, start the car. Wait for the engine to idle for about ten minutes, then turn off the engine and illuminate with ultraviolet light.

You will find an oil leak in the place that will be highlighted the brightest. If the oil line is damaged, when the engine is started, oil will begin to flow due to high pressure. Under this circumstance, the oil line must be replaced.

Another way - application of talc. Sprinkle potential leaks with as much talcum powder as possible. After that, start the engine and fix idling on it for 10-15 minutes.

The meaning of this technique lies in the fact that during the operation of the motor, the points of oil leakage will appear exactly where it is sprinkled with talcum powder. This is a fairly convenient and cheap method for detecting oil leaks. It is very important to find an oil leak in time and quickly fix this problem.

Causes of leakage and ways to solve the problem

It must be remembered that the problem is not where the oil goes, but where it comes from. In most cases, the grease leaves in the following places:

stuffing box;
oil filter;
distributor;
valve cover;
laying of the pallet crankcase;
belt or chain pulley;
crankshaft seals.

The earlier the year of manufacture of the motor, the greater the likelihood of a problem from aging of the seal or gasket. If used for a long time, these parts may lose their flexibility or be physically damaged. Of course, then they will have to be replaced.

It is much more unpleasant if the worn-out shaft became the cause of the oil level drop through the stuffing box. The fact is that sometimes, from regular friction against the stuffing box, a chip occurs on the shaft, through which the oil flows.

To eliminate this malfunction, it is necessary to replace the shaft, and this is a very expensive "pleasure". And the dismantling of the shaft itself is a rather laborious process, because you have to disassemble the entire engine.

The front seal wears out much faster than the rear. If you have to replace the crankshaft oil seals, then it will be useful to immediately change the camshaft oil seals.

The next possible cause of a leak is poor crankcase ventilation. The fact is that gases accumulate in the crankcase, due to which pressure arises. And the purpose of ventilation is to lower this pressure.

When the ventilation passages are clogged, the pressure in the crankcase begins to force the oil out, and as a result, a leak forms. Therefore, before eliminating any leakage, it is worth debugging proper ventilation.

Another reason for the leak excessive wear of the piston group of the motor. With such a malfunction, a leak is inevitable even with perfect crankcase ventilation. It simply cannot handle the large amount of gases entering the crankcase, and the result is high pressure. With this reason, there is only one way out - replacing the piston.

If you notice oil streams coming from under the oil filter, this problem can be fixed by yourself. To do this, just tighten the filter harder, and the oil will stop running.

If you find that grease is running out of the sump, remove the sump and inspect it. If the pallet is deformed, it is worth straightening, and then putting the pallet in place, sealing the connection points with sealant.

Leaks from the valve cover are eliminated as follows: the gasket must be removed, washed, and then, covered with sealant, put in place.

In addition, oil may begin to leak at the distributor fixing points. In order to solve this problem, you will have to unscrew the mounting bolts, dismantle the distributor, then cover the junction with sealant and, at the end of the procedure, put the distributor in its rightful place.

In conclusion, we say that in most cases the problem of oil loss in the engine can be solved independently. Of course, there are many such situations when it becomes necessary to send the car to a service station - and this must be done.
And most importantly, before each trip, inspect the car very carefully. This simple procedure will save you both time and money.