The oil pressure in the photon 1099 engine has disappeared. Why has the VAZ oil pressure disappeared? Fuel entering the lubrication system

Does the oil pressure light come on? Has the pressure dropped or the sensor is out of order? What is the threat of oil starvation? How to identify a malfunction while the engine has not yet failed? What other signs of low blood pressure, besides the light bulb, and what to do to keep the oil normal?

Causes

There are several reasons why the pressure has disappeared:

1. No oil level lower than the oil receiver and it does not enter the system
2. crack in the oil receiver - air enters the system through the crack, while the more viscous oil does not reach
3. poor pump performance due to wear or other breakdowns
4. losses in the lubrication system
5. oil dilution
6. non-working oil filter

Also, the light may be on if the oil pressure sensor is covered or the wire has jumped off it, but it is better to play it safe and check everything.

And now, in order with all these malfunctions

No oil - the level is lower than the oil receiver and oil does not enter the system

When the oil level is lower than the oil receiver, the oil cannot be sucked into the system by the oil pump, because there will be only one air at the inlet. As a rule, the oil receiver is located in the very bottom point engine, in a shallow recess so that it is always immersed in oil. But during operation, the oil may burn out and the level will drop, and then there will be nowhere to take the oil.

Long oil change intervals lead to the fact that the oil loses its detergent properties, and also stratifies - a liquid fraction and such a thick shoe polish are released, which settles on the surfaces of parts. Particularly thick as a dung, the fraction loves to stick to the oil receiver, thereby clogging its grid, not allowing the oil to pass through.

The way out of this situation is to monitor the oil level and replace it in a timely manner, draining all the nasty things from the system. Moreover, there are now a lot of fakes of oil, which thickens by five thousand kilometers. Do not drive on oil 15,000 is too much, especially if you operate a car in city mode. 7 - 10,000 is a perfectly acceptable replacement mileage.

Crack in the oil receiver tube

The principle of operation is as follows: the oil pump is at the top, the oil is at the bottom. Between them there is an oil receiver. The pump creates a vacuum in the receiver and oil is sucked into it from below. If a crack forms somewhere in the oil receiver tube, then air will enter the system instead of oil (try drinking a cocktail through a straw with a hole and everything will become clear).

The reason for this can be engine vibration, as a result of which a crack is formed, which subsequently increases, taking away less and less less oil from the pallet. There may also be a factory defect or incorrect installation of the part.

Defective oil pump

When the oil pump is worn out, it pumps oil with insufficient performance and reduced pressure, this is especially noticeable when starting the engine, when the oil has not yet really entered the pump housing and another example is when the oil is too liquid due to loss operational properties or fuel ingress into it - too large gaps in the oil pump do not make it possible to normally push the oil under normal pressure, because the oil flows out through these very worn out slots (these are no longer gaps, just slots).

The drive of the oil pump can also be such a breakdown, but this is a rarity, mainly on classic Zhiguli it happens, since on most passenger cars the oil pump is located on the crankshaft and is pressed by a pulley, there it is more likely that the pulley will fly off with the timing belt than the pump will stop turning. On the classic, the pump is driven by a gear that often wears out.

Losses in the lubrication system

To distribute oil throughout the system, it is not enough just a working pump that pumps oil, it is also necessary that the oil is distributed throughout the system without losses. Where can losses occur? There are such places!

• through the crankshaft liners
• through oil nozzles that do not close (not used on all motors)
• gaskets and a poorly twisted oil filter also pass well
• balancing shafts on some engines with a broken bushing

Oil will leak through any gap, reducing the pressure in the system. Most likely, a lot will not escape through the inserts, because if there are cracks there, there will be such a noise that it will be scary to drive.

Oil dilution

Liquid oil perfectly passes through the slots, so the oil pump cannot create normal pressure on such oil, because the oil passes through the gaps, like through a sieve. The oil reaches such an unsuitable condition due to the loss of operational properties, when the additives stop working, dung and a liquid fraction are formed, and can still be diluted with gasoline. Gasoline evaporates very quickly, so this is not the worst thing for oil.

Inoperative oil filter

The filter consists of a filter element and a valve system. When, during operation, the filter element is clogged with dirt and abrasive, it cannot pass oil through itself. Then the bypass valve comes to the rescue, which is normally closed, and when the filter element clogs, it opens and oil flows through it.

The filter element is an ordinary filter paper that retains small abrasive particles that form during operation. When the paper becomes clogged with these particles, it does not allow oil to pass through. So that there is no oil starvation in the oil filter there is a bypass valve - it opens, and all the debris that is not stuck in the paper is washed away.

If the valve hangs in the closed position, then that's it, there is nowhere to take oil, the filter is clogged, but there is no other way. This is where oil starvation begins. But if you change the oil on time, such a disaster will not happen.

How to determine?

Usually, the oil pressure light comes on first. Until it catches fire, most likely everything is in order.

If the earbuds knock - but as a rule, they knock connecting rod bearings, since they are located farther from the oil line, a characteristic very loud knocking of the engine appears, which is especially pronounced above 3000 rpm. This is the main sign of deterioration and starvation of connecting rod bearings.

What consequences?

If the liners knock, only under the measurement with the crankshaft grinding to the repair size, although sometimes you can do without grinding.

The parts of the cylinder head are most susceptible to oil starvation, especially if there are hydraulic lifters, they will have nowhere to take oil and the engine will troit. Then the camshaft will suffer, because it is the farthest in the lubrication system and the required amount of oil is unlikely to reach it.

With a short-term oil starvation, when the oil supply is lost, the connecting rod bearings first of all suffer - they need less than a minute to become a foil. The bearing shells may not be damaged in this case.

If the engines have oil nozzles that cool the pistons, then if they do not work properly, overheating and scuffing of the piston skirts may occur.

So keep an eye on the oil level and observe the drain interval, the consequences can be very costly.

It is well known that the engine internal combustion is a power unit in which there are a large number of loaded parts and assemblies. For normal operation, such parts need constant lubrication, which it provides. Working fluid the system contains engine oil.

In the lubrication system, oil is supplied through separate channels under a certain pressure, which makes it possible to effectively lubricate parts experiencing dynamic and other loads. At the same time, during the operation of the motor, you may encounter the fact that the oil pressure in the engine has disappeared. The driver may notice that the oil pressure lamp is blinking on a warm engine, the oil pressure is on idle engine falls, etc.

In this article, we intend to talk about what oil pressure should be in the engine, why there is no oil pressure in the engine, and also how to check the oil pressure in the engine on a gasoline or diesel internal combustion engine using available methods. In parallel, the question of what the additive gives to the engine to increase the oil pressure and how effective such a solution can be considered will be considered.

Read in this article

Low engine oil pressure: causes of malfunction

As already mentioned, a decrease in oil pressure is indicated by the illumination of the warning light on the instrument panel. Note that the indicated oil light does not have to be permanently lit. There are cases when the oil pressure light comes on when the engine heats up, while there is no such problem on a cold unit.

A similar situation occurs with idle. On, however, after increasing the speed to a certain value, it quickly goes out. In such cases, it is necessary to stop operating the car and find out why there is no oil pressure in the engine, the causes of the malfunction, and also decide on ways to eliminate them.

• First of all, it is necessary to inspect the internal combustion engine from above and below for obvious oil leaks, check. An insufficient amount lubricant will lead to the fact that the pressure drops and oil starvation occurs.

It is important to take into account that if there are no leaks, but the engine spun at high speeds for a long time before the light came on and experienced high loads, then it is quite possible to increase oil consumption for waste and reduce the level of lubrication for natural reasons.

• The next step is to check the condition of the oil itself. It is not allowed to use too "liquid" or viscous material that is not intended for of this type engine by the ICE manufacturer. It is the first case that often leads to the fact that low-viscosity oil is not able to create the required pressure.

We add that for this reason the oil pressure often drops on a warm engine (the gaps between the parts increase with heating, the grease is greatly diluted from the rising temperature). At the same time, while the engine and oil are cold, the viscosity of the lubricant is sufficient, that is, the light does not light up.

You can determine the problem by, as well as by the presence. Also an indirect sign is a decrease in the level of coolant in expansion tank cooling system, and the oil level in the lubrication system will increase.

• It should also be noted that the properties of the oil can be strongly influenced by the fuel entering the crankcase. If the engine is faulty (for example, there are problems with the quality and ignition of the fuel mixture, injectors are poured, etc.), then fuel is supplied to the combustion chamber, but the charge is not burned.

In this case, gasoline or diesel fuel gets into the crankcase through leaks, diluting the engine oil. Under such conditions, the viscosity of the oil will gradually decrease, at some point there will be pressure problems. The problem can be determined by the operation of the engine and the condition of the lubricant.

If there is no combustion in the cylinders, then the engine is strong, works intermittently, smokes, and over-consumes fuel. An elevated oil level and a distinct smell of fuel in it, as well as light spots and severe liquefaction, will indicate the presence of fuel in the lubricant.

• Deserves special attention, which may turn out to be a fake or a marriage. If there is no shut-off valve or shut-off washer in the filter, then after stopping the motor, the grease from the channels and filter will drain into the crankcase.

Further start-up leads to the fact that the pressure in the system is insufficient for several seconds, since during this time the filter is filled with oil. Naturally, until the pressure rises, the oil light will be on, then it will go out. However, the problem will recur after each stop and then restart.

Severe contamination of the oil filter, as well as its untimely replacement, can lead to a similar effect. Shut-off or pressure reducing valve in the system can wedge from trapped debris, deposits, etc.

• Another oil pressure in diesel engine or gasoline unit may be low due to grease leaking from the oil pressure sensor. In this case, the pressure in the area of ​​the sensor will not be enough. The emergency lamp can light up intermittently or constantly, on Idling, in motion at low or high revs.

Also, the likelihood of problems with the lubrication system itself and individual elements should not be ruled out. The pressure drop is often caused by oil pump malfunctions. Although manufacturers provide a margin for performance, sooner or later the clearances between the gears of the pump and its casing increase so much that the device does not create the required pressure.

During long-term operation or for other reasons, the oil receiver becomes heavily soiled. Its mesh is often clogged, as a result of which the lubricant is not supplied to the engine.

• Malfunctions of units and parts of the engine itself are also the cause low pressure... In this case, we can talk about serious wear or damage, which leads to the fact that desired resistance when feeding oil does not meet. It turns out that the pressure naturally drops.

Worn, wear and tear in the area, etc., can result in this pressure drop. Quite often, low lubrication pressure in such cases indicates the need for serious or even.

Oil pressure light comes on: emergency

So, if the oil pressure light is on or blinking, it means that the pressure in the lubrication system has dropped, the engine must be turned off as soon as possible.

• Even if no obvious smudges are visually visible (for example, valve lid dry, there are no traces of oil on the cylinder block), while the oil level is low, then you should carefully inspect the installation site of the oil filter and oil pressure sensor.

Also, increased attention should be paid to the junction of the engine sump. Many cars will require a detailed inspection from below, which is difficult to do without a pit or lift.

For this reason, when examining the engine compartment from above, pay attention to the lower part of the gearbox. Leaking crankshaft rear oil seal will cause grease to enter this area.

• In the event that a leak is found, you need to top up suitable oil(with intensive leakage, overflow is allowed slightly above the level). Then the engine can be started. If the light goes out, then you can drive to the service station on your own, without loading the motor.

And to do this strictly according to the regulations, since an increase in the service interval leads to severe contamination of the lubrication system. In this case, decay products and other deposits actively settle on the surfaces of parts and channel walls, clog filters and the oil receiver grid. The oil pump in such conditions may not provide the required pressure, oil starvation occurs and the wear of the motor increases significantly.

Every vehicle needs regular maintenance. This measure makes it possible to timely identify potential weak spots working installations and produce them renovation work... If you do not monitor the condition of the car and continue to operate it daily, then problems will not be long in coming. So, starting a vehicle one morning, the driver may find that the oil pressure in his engine has disappeared. What should be done in this case and why did such a situation arise at all? Let's figure out everything in order.

• How do you diagnose the problem?

  The main symptom of low oil in engine compartment- lighting up of a typical for this case light bulb on the car dashboard. Moreover, its behavior can change depending on the conditions vehicle... For example, the sensor can remind of itself only when the engine has warmed up to the required temperature, while on a cold power plant there may be no such symptoms. A similar problem can manifest itself at idle speed: if you do not press the gas pedal, the light will light up and blink, but if you increase the engine speed, the sensor will turn off. If such a situation arises, it is necessary to turn off the car, determine what is the reason for the pressure drop and fix the problem on its own or with the help of service center specialists.
  

  Causes of malfunctions and how to fix them

  Low oil pressure can form due to many design defects in the engine of the vehicle and due to the peculiarities oil liquid, therefore, we will consider the main causes of such a problem and find ways to solve it.

  Reason 1: Leakage of technical fluid

  Inspect the main components of the propulsion system: there may be an elementary oil leak. When there is too little of it, the pumping unit cannot provide the proper level of circulation of the protective material inside the working area, because of this, the oil pressure inside the structure drops.

  Elimination

  The oil pressure will not rise until the problem part is repaired or replaced. Fluid may leak out of the system due to wear. oil scraper rings and caps, violation of the integrity of the cylinder block walls, drying out of rubber bands and oil seals. It is also possible to increase the oil pressure by simply adding liquid, but the effect will not be long-lasting.

  In order for the oil to be consumed as usual, it is necessary to calculate which part contributes to the leak and replace it. By the way, if you regularly carry out maintenance of the vehicle and monitor the condition of the sealing elements, the engine will be able to maintain the oil pressure throughout the entire interchange period.

  If visual inspection did not allow to identify problem place, but the liquid continues to leave motor installation, it's time to change your driving style.

  Aggressive starts and sudden braking temporarily create increased pressure inside the engine, which is why the oil film is squeezed out abundantly. After most of it leaves the working area, the pressure inside the system will drop to a minimum, which will cause a deterioration in its power characteristics and the oil pressure sensor igniting. Try to smoothly press the accelerator pedal, do not operate the car at high revs unnecessarily and warm it up for 5-7 minutes with a cold start.

  Reason 2: Inappropriate composition and properties of the products used

  Have you checked the markings technical fluid with the recommendations of the car manufacturer before maintenance car? In the event of a discrepancy between these indicators, the car engine will cease to function in the usual mode: the pressure inside the working area disappears due to the increased fluidity of the protective lubricant, which, under the influence high temperatures begins to lose its consumer properties and leave the structure through the increasing clearances of the installation.
  

  Elimination

  How to increase the pressure of the technical fluid in this case? It's very simple: just pour oil under the hood with the parameters required by the automaker. You can get acquainted with them from the official representatives of the brand of your vehicle or in the manual for its operation. It is not recommended to select oil based only on the opinions of “knowledgeable” friends or shop assistants.

  Reason 3: Unaccounted climatic conditions when choosing engine oil

  When choosing a liquid according to the parameters of an automaker, you should also pay attention to its temperature features. For example, if the weather conditions in your area involve extremely hot summer days, then the motor lubricant should be able to withstand severe overheating. The lack of such "skill" can also cause insufficient pressure within the system.

  Elimination

  

  Average oil performance ranges

  If pressure drops due to climatic changes, select motor fluid, based on the temperature features. SAE classification can help with this. It allows you to understand the limits of permissible operating temperatures motor lubricant... For example, 0w30 liquids function from -40 to +30 degrees Celsius, 10w40 - from -25 to +40, etc.

  Reason 4: Mixing oil with other automotive fluids

  Leakage violation power unit can cause liquid from the cooling system to enter it. Antifreeze, or antifreeze, mixing with the poured oil, neutralizes its properties and causes abundant foaming. Capturing foam instead of oil, the pump cannot create the required circulation of the working mixture inside the installation, as a result of which the engine performance decreases. A thick white exhaust smoke, increased coolant consumption and the formation of a white emulsion on the engine dipstick and the inner surface of the oil filler cap.

  The presence of gasoline or diesel in the crankcase of the car indicates serious malfunctions.

  In addition to antifreeze, low oil pressure can cause oil mixing with unburned fuel. Diagnosing oil dilution is quite simple: to do this, disconnect the crankcase ventilation pipe and carefully smell the exhaust. If the bad pressure is caused by mixing oil with fuel, the smell will be dominated by the gasoline odor.

  Elimination

  

  To eliminate oil-gasoline mixing, it is necessary to figure out exactly where the fuel and lubricants are leaking out: through cracks in the diaphragm (typical for systems with a mechanical gasoline pump) or through the cylinders of the combustion chambers. If the working diaphragm of the fuel pump has worn out in the engine, it is no longer worth operating the car. Replace the deformed part with a new one. Such a measure will raise the pressure inside power plant and will increase its power characteristics.

  Things are much more serious when fuel mixture enters the working area through the cylinders. First, the mixing of fuels and lubricants causes a decrease in operational capabilities oil, secondly, the protective layer is washed off from the cylinder walls, which in turn leads to rapid wear and overheating piston group... This situation occurs when low-quality spark plugs are installed in the motor. At idle, they cope with the work without problems, but with an increase in speed, they cease to ignite the mixture in a timely manner. As a result, part of the fuel that has not been burnt in the chamber flows down and enters the working area.

  How to raise the pressure in this case? Of course, the first step is to replace the spark plugs and then fill with new engine fluid.
  

  Reason 5: defective oil filter

  When installing a new oil filter in the car, carefully inspect its components. If it does not have a check valve or a lock washer, it can help the protective grease to drain into the crankcase after the vehicle is stopped. Further start-up of the machine will be accompanied by a prolonged burning of the oil lamp. This happens because after stopping inside the filter, the pressure required for effective circulation of the oil fluid disappears. After the motor is started, the pressure will increase until it reaches the desired value, then the sensor will turn off.

  Elimination

  

  This situation will be repeated after each turning off-turning on of the motor until a new oil filter with a shut-off valve is installed. Buying spare parts and expendable materials for your car, do not seek to save. Even a small defect in the oil filter can destroy the entire propulsion system and leave the driver without a vehicle.

  And finally

  If the indicator lights up on the dashboard every now and then engine oil, you should not ignore the problem. The causes of pressure drop listed above are most common in vehicles that are operated on a daily basis under heavy overload conditions. Having figured out why there is no engine oil pressure in the car engine, you can solve this problem yourself. You can also contact a specialized service center and entrust the work to professionals. The main thing is not to close your eyes to the problem!

Situations often arise when the oil pressure in the engine drops on the go. In such cases, it is imperative to turn off the engine, stop and try to determine the reasons for the problem.

Fault identification and troubleshooting

Before you figure out why the pressure in the engine has dropped, you can try to change the oil.

This solution will be effective only if the fill new fluid has not been performed for a long time. It will be equally useless to try to increase pressure by changing the oil in an old worn out motor. In situations like this, only one action should be effective - overhaul engine. Low oil pressure can most often be caused by the poor condition of the car.

If a fluid and filter change has been performed beforehand and the indicator light continues to flash, the pressure can be checked using an alternative method, which is used for de-listing. possible malfunctions sweetheart and contacts. How to check the oil pressure in the engine correctly? To do this, you need to do the following:

Required tools for measuring oil pressure

• You will need a pressure gauge, an air hose, and an iron fitting with a thread that matches the oil gauge.
• The pressure gauge and the fitting are connected to each other using a hose and special clamps;
• The pressure sensor is slightly loosened and then unscrewed;
• In place of the sensor, a fitting with a special gasket is installed to seal the connection;
• The engine is started for a short period of time, during which it is necessary to fix the oil pressure in the engine.

A pressure gauge reading between 0 and 1 bar indicates normal operation of the sensor and the need to identify the problem elsewhere. Any pressure above 1 bar indicates the need to check the quality of the installed wiring or a specific sensor, since the panel displays false readings.

Situations when there is no oil pressure in the engine due to damaged oil pumps, as well as crankshafts, occur much more often. The design features of most brands of cars allow you to get to these devices. In such situations, it is better to drain the liquid and wait a little so that it completely drains out of the motor.

After that, the protection is removed, as well as the crater pan to check for any clogging. Then the procedure for dismantling the oil pump itself is carried out. In some cases, it is necessary to raise the engine by first unscrewing each mount on the pillows or to dismantle other components that restrict access.

After that, a check is performed by placing the pump in a container with diesel fuel. At the same time, it is necessary to perform rotary movements of the drive shaft. If diesel fuel is not being pumped, the pump will have to be disassembled and repaired. After that, the device is fixed in place and a new gasket is additionally installed. After installation, it is imperative to make sure that the device is operational and that all installation rules are followed. After that, you just need to collect all the components in reverse order and enjoy driving, since the pressure in the motor can certainly be increased in this way.

Why is there a decrease in pressure?

Many do not know how to raise the oil pressure in the engine because they have not figured out the causes of this malfunction, which can be very numerous. As mentioned earlier, the problem may lie in the sensor itself, which outputs to dashboard inaccurate information about the state of the mechanics of the car. Therefore, consider all possible options a malfunction occurs:
It is necessary to replace the lubricating fluid in the motor. For various reasons, engine oil can lose its viscosity and other necessary performance characteristics... In some cases, the problem may be a clogged oil filter. Sometimes there are difficulties in working with the oil pump. Possible malfunction of the pressure reducing valve. Sometimes there are crankshaft-mounted bearing clearances that exceed normal dimensions. The distance between the camshaft bed and its journal increases. The pressure sensor as well as the wiring may not work well.

If the fluid is not changed in a timely manner, a moment may come when its viscosity index will be reduced to an unacceptable limit. This can not only cause a decrease in pressure in the motor, but also damage to its components. Clogging in oil filters are not the main cause of pressure drop in engines. This can be due to severe wear on the metal components.

The oil is diluted with gasoline

Few have had to deal with such questions. From time to time, small amounts of fuel still penetrate the crater. The oil is gradually diluted with gasoline, its viscosity decreases and, as a result, the pressure decreases. It is not difficult to detect foreign impurities in lubricants. To do this, simply pull out the dipstick and sniff it. If it smells like gasoline, then there is a leak. It is recommended that you try to smell the exhaust from an open crater so that you can smell it more clearly.

To eliminate such a malfunction, you need to understand how it can arise:

• Diaphragm cracks can leak fuel in power-driven systems.
• Fuel enters the crater from the combustion chambers through the cylinders.

If fuel penetrates through the cylinders, in addition to mixing with oil, the problem of removing the protective film from the walls is added. Routine driving with poor quality spark plugs can cause these problems. In this case, the air-fuel mixture is not completely ignited and settles down. The process of engine oil dilution and cylinder damage gradually proceeds.

And a little about the secrets of the Author

My life is not only connected with cars, but also with repair and maintenance. But I also have a hobby like all men. My hobby is fishing.

I started a personal blog where I share my experience. I try a lot of things, various methods and ways to increase the catch. If interested, you can read it. Nothing more, just my personal experience.

Attention, only TODAY!

If the oil pressure in the engine disappears right on the move, then you must immediately stop, turn off the engine and find out the cause of this phenomenon.

When a red lamp is on, indicating a critically low oil pressure, it is unacceptable to start the engine.

With a red lamp burning, indicating a critically low oil pressure, it is unacceptable even to start the engine, let alone drive. It is just as important to deal with the problem when the lamp flashes periodically or the arrow of the device is practically at zero. Otherwise, the consequences can be very sad.

Why is this happening?

Oddly enough, there are many reasons why the device shows low oil pressure or the red indicator lights up. We are talking specifically about the control sensor, whose readings are displayed on the driver's panel in the form of readings or signals. Indeed, in fact, everything may be in order with the engine, therefore all should be considered possible reasons... Here they are:

1. It's time to change your lubricant. Due to various circumstances, it became too liquid and lost all the necessary properties.
2. The filter is clogged.
3. Oil pump problems.
4. Reducing valve defective.
5. The clearances in the crankshaft plain bearings (liners) have exceeded the maximum permissible values.
6. Large gaps between the necks camshaft and his bed.
7. Faulty pressure sensor or wiring.

If you do not change the lubricant in time, then there will come a time when its viscosity drops to the limit. A gear pump designed for pumping a viscous medium will not be able to create the required pressure in the system, which will be signaled by the sensor. The oil should be changed at least once a year or every 8000-15000 km, depending on its base (mineral or synthetic).

A clogged filter is not a common cause of low oil pressure in combustion engines. Nevertheless, this happens due to the processes of intense wear of metal parts that occur in the motor.

For example, the flying off shoe of the chain damper on classic VAZ models causes its beating against the cylinder head housing. If you do not attach importance to the noise that has appeared, then pretty soon the chain will gnaw a decent groove on the edge of the aluminum case. Naturally, all the chips will settle in the filter.

The oil receiver mesh can also become clogged. But similar troubles occur with those cars whose owners are not concerned with the care and maintenance of their iron horses. All other reasons, such as wear of pump gears, increased clearances and valve malfunctions, are difficult to eliminate and entail disassembly of the unit.

But first you need to make sure that the sensor itself and its wiring are in order, for this you need to perform an additional check of the oil pressure in the engine.

As a minimum, it can turn the bushings, and at the maximum, it can jam the shaft due to overheating.

Back to the table of contents

Identifying and Troubleshooting

If the oil pressure in the engine has disappeared, then it must be replaced.

The first thing to do when the pressure drops is to try to change the oil. Unless, of course, this was done a week ago, then the replacement will definitely give nothing. Also, there will be no special changes when pouring new grease into an old, worn out motor to the limit. Only major repairs will help here. But after a long interval, when the owner of the car has not been involved in its maintenance for a long time, the effect will definitely manifest itself.

Have you changed the oil with the filter, and the lamp still burns? It is necessary to check the pressure in an alternative way to exclude from the list the causes of the sensor and wiring malfunction. For this purpose it is necessary:

1. Find a pressure gauge with a 10 bar scale, an oxygen hose and a metal fitting. The latter must match the thread with the oil gauge.
2. Connect the fitting and the pressure gauge with a hose using clamps.
3. Loosen and unscrew the pressure sensor, having previously disconnected the connector.
4. Screw the fitting into its place, and do not forget the sealing gasket.
5. Run the engine at idle speed for a short time and read the pressure gauge.

A reading from 0 to 1 bar indicates that the sensor is good and the problem should be looked elsewhere. Any value over 1 bar indicates that additional verification of the wiring or the sensor itself is necessary, as it gives false readings to the panel. Although such malfunctions are very rare.

But the worn out oil pumps and crankshafts are much more common. You can think for a long time how to raise the oil pressure in the engine, but after all the above measures, do it with little blood will not succeed. Unless the unit is still new or has recently undergone a major overhaul, then there is still hope for a malfunction of the oil pumping pump.

The device of many car brands allows you to get to the pump without completely dismantling the power unit. In this situation, the grease will have to be drained again and wait a while for it to glass well. Then unscrew the protection and the oil pan, remove it and inspect the mesh for clogging. After that, the pump itself should be removed. You may need to raise the motor by unscrewing the mountings on the pillows, or remove other parts restricting access.

Next, you need to check by immersing the pump in a container with diesel fuel and rotating the drive shaft. If diesel fuel is not pumped, then the oil pump should be disassembled, thoroughly rinsed and a new pair of gears installed from the repair kit. Then assemble the assembly by installing a new gasket and make sure it works. Now all that remains is to assemble everything in the reverse order and enjoy the ride.

If, after removal, the oil pump immediately showed normal operation or the design of the machine does not allow getting to it at all, then the hopes of getting off with a slight fright did not come true. You will have to disassemble, or even completely remove the engine, otherwise it will not be possible to increase the pressure. And there is no need to take half measures, because if the gaps in the crankshaft bearings have become large, then all other parts are in a similar state and need to be replaced.