Oil pressure in a Priora engine 16 valves

No oil pressure in the engine(((( — Community “Lada Priora (Lada Priora Club)” on DRIVE2

Hello everyone again... I wrote here about 2 weeks ago about the oil pressure in the Priora... in general, I copied everything that I wrote earlier: Hello everyone. In general, this is the problem, I went through the engine 21126, the pistons on the stk were changed, the block was sharpened, the knee was not when starting off they said the new inserts were normal, the pump and oil receiver were new, Motul 10/40 oil, the head was not repaired except for replacing the caps and grinding in the valves. And after all this, when warmed up to 60 degrees. The oil pump starts flashing, everything is fine when it’s cold... I haven’t measured the pressure yet, but even without it I understand that when it’s hot it disappears. I don’t know what to do. Help. Something like this. Now I will tell you what happened and is happening now.

I went through the engine with a new one, everything was clean and purged, every channel, before assembly and before assembly, the sensor is new, the hydraulic compensators are new... practically a new engine, only with very large holes... now at 60 degrees the oil pan does not start blinking, it just lights up stupidly 60 degrees... The new hydraulic compensators do not pump and do not want to, there is no pressure... We measured it with a mechanical sensor, both cold and hot, under a load of 0.5, but there is a possibility that the sensor is sick... they will bring another sensor soon and we will measure... if so and if I stay, I don’t know what to do but burn everything down *(((((

Purpose of the sensor

The oil pressure sensor is designed to promptly and accurately inform the driver about low lubricant pressure inside the internal combustion engine. So, as soon as the rapid detection of such a malfunction will allow you to avoid unnecessary problems and even greater engine breakdowns in the shortest possible time. It's no secret that dry engine operation can cause very serious damage to the engine. But on the other hand, you shouldn’t immediately panic and draw conclusions; it’s enough to first check the sensor itself.

Mistakes in hasty conclusions

When the oil pressure light comes on, many car owners sound the alarm and begin to fix this problem in all but not the most important ways, and these include:

Oil change and fuel filter replacement.
It is washed.
The pressure is measured.

But after this, the result does not happen! Therefore, always check the oil pressure sensor first, as this is the most common and common cause.

Sensor check

It is necessary to check the functionality of the sensor in the following order:

We remove the wire from the sensor and lean it against ground, possibly on the motor housing.
Check to see if the light on the instrument panel lights up again.
If the lamp stops burning, then the wiring is working properly and you can move on to the next stage of dismantling the faulty sensor.
And if it continues to burn, then it is necessary to “ring” the wires at the entire stage from the sensor to the instrument panel to detect a breakdown or short circuit in the circuit.

How to check the pressure in the system?

A warning light that indicates an emergency condition of oil pressure is absolutely necessary.

However, like all electrical appliances, it can burn out, its contacts can become unusable, and there are also a number of cases when its signals can be false. Therefore, checking the oil pressure should be carried out periodically.

For diagnostics, we will need a special pressure gauge to monitor oil pressure; if you don’t have one, we recommend purchasing one, fortunately, it is inexpensive and can always come in handy.

We start the engine and wait for its temperature to rise to operating temperature, that is, 90°C.
Next, we turn it off, find the oil pressure sensor, unscrew it and screw the pressure gauge into the vacant space.

It's easy enough to rip off the nut and then just unscrew it by hand.

The pressure gauge readings are increasing.

Please note that if you have an on-board computer, it is possible to connect data coming from the fuel pressure sensor and then they will be accurately visible in digital form.

Engine oil operating pressure indicators

Any car operating manual indicates what operating oil pressure in the engine is required specifically for each engine. As for the 16-valve VAZ-2112 engine, the figures are equal:

At idle speed: 2 BAR.
At 5 thousand revolutions: from 4.5 to 6.5 BAR.

In what cases is it necessary to replace motor lubricant?

Why the oil pressure light on the VAZ 2114/2115 is on: reasons and solutions

The performance of the power unit and the operation of the vehicle itself will depend on the characteristics of the lubricant and its quality. The manufacturer installed several different engines on the Priora, ranging from 8-valve 21114 and 21116 to 21126–21128. They already have 16 valves and are capable of producing power up to 120 hp.

According to the recommendations provided by the manufacturer, oil changes must be carried out in strict accordance with the regulations. For new cars, as well as for those that have undergone major engine repairs, this should be done after 2.5 - 3 thousand kilometers. When should you change the lubricant afterwards? Everything is very simple here - during further operation you will have to replace it every 15 thousand kilometers or annually, without regard to mileage.

However, these are not all situations that affect oil consumption and the need to change it. Manufacturers say that the engine can consume up to 1 liter of lubricant literally for every 1000 kilometers traveled. This is a common occurrence, especially for domestic engines, but a more accurate consumption rate depends on the characteristics of the oil, for example, its viscosity, as well as operating conditions. When driving at high speeds, frequent accelerations, and also when the engine has not been run-in, the degree of consumption will be an order of magnitude higher.

Why did the oil pressure drop?

The constant burning of the red icon with an oil can, signaling the absence of the required oil pressure, can be caused by several reasons.

The most likely ones are:

significant drop in oil level. It can be caused by a leak or simply by the inattention of a car enthusiast who did not notice the level dropping to critical. This reason is the safest for the car; you just need to replenish the oil level and continue driving (while making sure that the warning light goes out);
wear of the bearings (connecting rod and main bearings). The wear of these parts does not occur instantly, but lasts for a long time, as a result of which the warning light will initially light up only while driving, and then will also light up at idle speed. To solve this problem, you will have to replace the liners with new ones, and in the worst case, bore the crankshaft and select liners;
oil filled out of season. If the oil pressure in the VAZ 2114 engine is lost in the cold, then this very reason may be the most likely. Summer oil thickens greatly during the cold season, as a result of which the oil pump simply stops pumping it. To fix this problem, you will have to drain all the oil and replace it with winter oil;
oil pump wear. During operation of the machine, the pump, like other units, experiences certain loads and may fail over time. The problem can only be solved by replacing the oil pump with a similar one;
Oil filter clogged. This situation is also not uncommon, but can be solved quite quickly by simply replacing the filter;
short circuit between the warning light and the oil level sensor. In this case, you can check the circuit using a conventional tester and, if a malfunction is detected (for example, a short circuit in the wires), eliminate it;
oil level sensor malfunction. It is quite difficult to check the functionality of the sensor under normal conditions, so you should replace it with a similar one. If after this the light goes out, then the problem lies in the sensor itself.

Checking oil pressure

The main reasons for the oil pressure warning light to come on

So, the warning light usually lights up after starting the engine or when it is idling. There may be several reasons for this phenomenon, but the main thing is to understand and accept for yourself that this should be a signal that there is some kind of malfunction. Therefore, you need to take appropriate measures so as not to worsen the situation. In any case, if the lamp blinks, it means that you need to identify the malfunction and do everything to eliminate it as soon as possible.

Among the main reasons for the indicator to light up are the following:

Reduced lubricant pressure in the system. This is one of the most common reasons, but even today there are owners who stubbornly do not notice signs of oil leakage or do not look into the engine compartment. Why does pressure drop, you ask? Because the oil gradually leaves the system

Therefore, you should pay attention to any stains on the engine or under the car where it is parked. Do not forget that by simply adding lubricant to the system, you do not solve the problem, but only forget about it for a while. Another reason for the warning light to blink is due to the use of low-quality oil filters. Some of the lubricant remains in them even when you stop the engine.

If the filter is of dubious quality, then it does not retain oil, but it directly flows into the crankcase. Thus, a periodic drop in pressure occurs.

Some of the lubricant remains in them even when you stop the engine. If the filter is of dubious quality, then it does not retain oil, but it directly flows into the crankcase. Thus, a periodic drop in pressure occurs.

Lack of lubrication may be associated with failure of the pressure relief valve. It should be in the closed position if the pressure level in the system is insufficient. However, when the valve fails or gets stuck, the pressure generated is not enough, which causes the warning light to light up.
Another reason is a faulty pressure sensor. It is directly related to the operation of the control indicator, since it is connected to it by the same wire. As soon as the pressure returns to normal, the contacts should open, as a result of which the indicator should go out. This will not happen if the sensor itself has become faulty.
The indicator also starts blinking if the oil pump screen is clogged. It acts as an obstacle to particles of dirt, metal, dust and any other unwanted elements that lead to wear on the pump. If the oil is not dirty, but of normal quality, then it freely penetrates through the mesh. When it is contaminated, the required pressure is not created in the system, which leads to the warning lamp coming on. Most often, this reason manifests itself on a cold engine, because as it warms up, the lubricant becomes more liquid and passes through the mesh much more easily.
The oil pump itself may also fail. It is this that creates an acceptable level of pressure in the entire system. If this does not happen, the sensor contacts close, which leads to the appearance of a signal indicator on the panel. Therefore, in this case, you will have to dismantle the oil pan and pump to eliminate the problem.

Electrical circuits of VAZ 2106 individual components

Below are the VAZ 2106 wiring diagrams in color photos and pictures. Each system is equipped with an electrical plan that allows you to connect wires and connect electrical appliances.

Generator connection diagram

Identification of generator assembly wiring components:

1 - battery;
2 — “six” generator set;
3 - regulatory device designed to control the operating voltage parameter;
4 - lock;
5 — plastic module with safety elements;
6 - control light indicator that determines the battery charge;
7 - relay that protects the power line of the battery charge indicator light.

Starter wiring diagram

The “six” wiring for starting the power unit is tied to the starter unit:

1 — car starter device;
2 - battery;
3 - generator set;
4 - ignition switch.

The symbol P1 indicates the pull-in winding of the relay, and the symbol P2 indicates the holding coil.

Electrical circuits of contact and non-contact ignition systems

Depending on the modification, the domestic “six” can be equipped with a contact or non-contact ignition system. Both options have certain differences, indicated in the given diagrams.

1 — spark plugs;
2 - distributor;
3 — ignition switch;
4 - coil;
5 - switch;
6 - generator;
7 - battery.

Scheme of contactless SZ on the “six”

1 - battery;
2 - generator;
3 — ignition switch;
4 - coil;
5 - switch;
6 — sensor-distributor;
7 - candles.

Electrical circuit for controlling the carburetor solenoid valve 21053-1107010

1 - limit switching device of the carburetor unit;
2 - the engine valve itself;
3 - module used to control the carburetor unit;
4 — ignition coil;
5 - switching device;
6 - ignition switch, is a lock.

Wiring diagram of direction indicators and hazard warning lights

1 — lighting devices for turning lights installed in the front optical devices;
2 - battery;
3 - car generator unit;
4 — side turning lights located on the front fenders;
5 — main mounting module with safety elements;
6 - auxiliary control unit with safety devices;
7 — ignition switch;
8 - device for turning off and activating the light signal, mounted in the car interior on the center console;
9 - switching device for activating and disabling turning lights;
10 - interrupting device used for blinking turning lights and light signals;
11 — speedometer, equipped with a control light indicator for activation of turning lights;
12 — light devices for direction indicators in the rear optics.

Sound signal switching circuit

Description of the main elements of this component of the electrical circuit:

1 - sound devices used to reproduce impulses;
2 - relay for activation of sound impulses, protects the electrical circuit from overvoltage;
3 — switch of sound pulses;
4 — mounting module with safety elements;
5 — generator set VAZ 2106;
6 - battery.

Heater motor connection diagram

Designation of elements of the heating unit electric motor activation system:

1 - electric motor of the heating system;
2 - additional resistor element;
3 - switching device for the electric motor of the stove in the car;
4 - safety module;
5 - lock;
6 — generator unit;
7 - battery.

Installation of an additional oil pressure indicator on a VAZ-2112

Judging by the comments on various VAZ-2112 forums, more and more owners of this car are installing additional sensors that record the oil pressure in the system. A regular sensor from the “classics” does this job very well.

The sensor is ready for installation.

If you decide to connect it, it can be easily mounted according to the following picture with the part numbers.

This scheme is completely working.

5.1.9 Oil pressure has dropped

There is an engine oil pressure indicator light on your car's dashboard. For reliable engine operation, it is necessary that sufficiently high pressure is constantly provided in the engine lubrication system.

If the oil pressure warning light comes on while the engine is running and remains on at increased speed, this is an alarming sign. You need to stop immediately, stop the engine and find out the cause. Continued operation of the engine with low oil pressure can lead to serious engine damage and large financial costs for repairs.

Checking the lubrication system

Lost oil pressure at idle. — Community “Lada Priora Club” on DRIVE2

Good day everyone, another problem has happened and we can’t solve it in any way. In general, they made the head, changed the guides, then ground in the valves and installed Reserve seals. We reassembled it and the engine began to emit blue smoke, but not always. Sometimes when heating up at idle there was a lot of smoke, it was decided to change the valve seals, we bought Victo Rains seals and immediately left the Prima rings. Since the old ones had gaps and oil leakage on the 2nd and 4th piston. After assembly there was no smoke at all, but when warming up the oil pressure lamp blinked, checked with a mechanical pressure gauge, it showed 0.5 kg at idle at a temperature of 95 degrees. And so it was made. We replaced the oil and filter, the oil receiver and removed the oil pump, measured the pump with a micrometer and it even looked to be in excellent condition. The main liners have not been replaced, but visually they are free of scuffs and scuffs. Next we measured the camshaft journals, the intake one near the oil seal was 23.92 mm and the rest up to 23.95 mm.

In general, I replaced both shafts, since there is nothing left to think about. As a result, the pressure did not improve. The pressure reducing valve holds, but not for very long; when warming up, the compensators begin to knock. That's all we can do... give us some more advice on what and how to check.

Today, purely for the sake of my own curiosity, I bought a set from a VAZ 2106 (pointer, sensor, etc., etc.) installed and connected, as a result, when warmed up at xx, it presses 3 (well, maybe 2.7), at 3000 rpm 4 with kopecks at 5000 about 5 s half

I can’t vouch for the accuracy of the measurements, what I see is what I’m writing, I think everyone has seen the pressure indicator in the wheel.

mileage 5000 km car for half a year oil shell helix hx7 10w-40 I'm going to switch to helix ultra

Or maybe just screw a threesome in there and that’s it? How reliable is this one from 2106? install a standard pressure switch and plug the other end. When should I insert a pressure gauge there? So as not to jerk back and forth.

The standard set is available almost everywhere, I bought it for 120 rubles (banjo, fitting, medical gasket). There was a plug on the banjo for a long time. This set is more convenient because... similar to a constructor - any combination of installation.

Here it is at a more attractive price https://www.aliexpress.com/item/New-Blue-Oil-Pressure-Adaptor-Temperature-Temp-Gauge-Filter-Sandwich-Plate-Sensor-1-8-NPT-Free/ 1052442796.html

The pictures are not saved, so I posted the link. The only thing I didn't like was the adapter nut. in the place where the adapter presses there is a very small pressing area according to the photo

Warm up engine oil Zic+10-40 at idle a little more than 1 At, 3000 - about 3 At

Found in the forum archives: The oil pressure in the area of the pressure sensor on the VAZ-21126 engine should be at least 1.2 (kgf/cm2).” Department for analyzing the quality of vehicles in operation. Leading process engineer. Nikolai Nikolaevich Gapchenko

Lada Priora Sedan ✔™ › Logbook › The oil pressure light is blinking Lada Priora [solved]

I began to notice that in the heat, as soon as the engine heats up to a temperature above 90 degrees, the oil pressure light begins to blink at idle, and if you slightly increase the speed, the lamp stops blinking.

Based on the results of an Internet search, we were able to find out the following most common reasons:
1. The oil pressure sensor is faulty
- the most basic reason and the least labor-intensive - it takes 5 minutes with a smoke break - buy a new sensor for 180 rubles, unscrew the old one and screw in a new one in its place (but I didn’t take the easy way, but skipped this point and started with the most difficult one)
2. Problems with the oil receiver
- either the sealing ring on the oil receiver is worn out, or the oil receiver is clogged and does not allow enough oil to pass through it.
It is necessary to drain the oil, remove the pan, unscrew the three bolts of the oil receiver, remove it, clean it and replace the O-ring. From a financial point of view, the option is also not expensive and is a little more labor-intensive than the first - 12 rubles for an o-ring and 100 rubles for a pan gasket. — the pan and oil receiver can be unscrewed and tightened without problems. 3. The camshaft support journals are worn out
- the most difficult, because...
you need to get the camshafts, i.e. you need to remove the intake receiver, timing belt (belt, rollers and gears), valve cover, camshaft bed. I didn’t want to do this, but... I’ve been planning to glue the valve cover and bed for almost two years now - so I decided to start with this, the most difficult path))) 4. The oil pump is faulty
- as they say - this is the least likely option, because they claim that the pump is almost eternal))) - so I decided to skip this point and move on to it only if the previous points do not help.

And having thus decided on the reasons, the list of work became clear: 1. Remove the camshaft bed, take out the camshafts and measure their support journals - whether they are within tolerance or not. 2. Remove the oil receiver - clean it and replace the O-ring 3. Replace the oil sensor if the first two points do not help (and in general this should be done first)

I decided on the materials and tools for repair and maintenance:
1. Anaerobic sealant
(for gluing the valve cover and camshaft bed) In the Murzilka they recommend Loctite 574, but I simply couldn’t find it anywhere - I took its analogue in a syringe for 200 rubles (someone says that this is not an analogue, namely Loctite 574 packaged in syringes, but I am inclined to believe that this is an analogue, not the original)

Check and replacement

During operation of the VAZ-2112, various malfunctions may occur. For example, the oil pressure sensor may fail. However, before drawing conclusions about the causes or presence of a possible breakdown, you should first check the functionality of the device.

The check is performed as follows:

First of all, check the circuit connecting the DDM and the control lamp. To do this, take the sensor wire and lean it against the surface of the engine. At the same time as this action, you should see if the light on the dashboard is on. If the lamp goes out, then the wiring is fine and the problem is really in the sensor.
The next step is to remove the device from the vehicle for a visual inspection. The first sign of a breakdown is the presence of moisture on the sensor.

If the DDM turns out to be dry and everything is in order with the wiring, it is recommended to look for the problem elsewhere. For example, the malfunction may be in the oil level or its quality. You can also replace the oil filter if necessary.

There is another way to check the functionality of the sensor in the VAZ-2112. It is considered more reliable and proven. In this case, you will need to use a pressure gauge, and the sequence of actions will look like this:

First of all, it is necessary to warm up the engine until it reaches operating temperature, and then turn it off.
Next, you need to unscrew the sensor from the car and screw in the pressure gauge in its place.

The ground wire of the pressure gauge will need to be connected to the ground of the vehicle.
After this, you need to connect the control LED to the battery.
The next action is to turn on the engine and press the gas pedal. In this case, it is necessary to take into account that the speed rises gradually.

When the action is completed, you should carefully monitor the pressure gauge and LED. If the device readings reach 1.2 and 1.6 bar, but the LED does not go out, then the sensor is faulty and needs to be replaced.

To carry out the replacement you will need:

Stock up on the necessary tools, as well as a new sensor.
Disconnect the wires from the old device.

Unscrew the sensor using a wrench.

Remove the unit. In this case, during the dismantling process, you should pay attention to the fact that the sealing ring should come out along with the sensor. It will also need to be replaced.

Install a new sensor.
Check the contacts and clean them if necessary, then connect the wires.

When all the steps are completed, you can start the engine again and check the serviceability of the sensor.

It is worth noting that during replacement a little oil may leak out of it. In this case, you should pay attention to what kind of sensor was installed before and conclude that it may have been defective.

Replacement instructions

You can do the work yourself, since in fact, changing the oil on Kalina is carried out without the need for special tools or professional skills. Even beginners can cope with this task.

Follow the instructions to avoid mistakes and save yourself money on car repair services.

It is more convenient to carry out work on an inspection pit or a lift. Apply the handbrake and warm up the engine to operating temperature. This will provide the oil with the necessary fluidity, which will allow it to leave the system as much as possible. Complete drainage of used oil guarantees efficient and long-lasting operation of fresh lubricant.
Move under the car. Place an empty container near the drain plug where the liquid will drain. If the engine crankcase is equipped with protection, remove it first.
Use a wrench, socket or hexagon to unscrew the drain plug. Let the oil drain completely. This will take about 20 minutes if the engine has been preheated to operating temperature. If the oil is cold, it will take a long time to drain, leaving a large amount of old lubricant in the system.
While the oil is draining, go under the hood. Use a puller or do it yourself to unscrew the oil filter. You will find it to the left of the power unit at the bottom. If you don’t have a filter puller and you can’t move it by hand, take a screwdriver. It is pierced through the filter housing and used as a lever, turning it counterclockwise.
After removing the filter, screw the drain plug back on. First look at the seal. If it is worn out, it is better to replace it to prevent possible oil leakage.
Lubricate the seal of the new filter with oil, fill the housing with fresh grease to approximately 50% of its volume, and then screw it into place. The filter should be installed without using tools, but only by hand, so as not to damage the element.
Now unscrew the plug to fill in new working fluid. Fill gradually, and not all 3 liters at once. Check the oil level periodically with a dipstick. You need to ensure that the dipstick shows the level exactly between o and “Max”. If you add too much liquid, you will have to drain some of it again.
When ready, close the filler neck, start the engine and let it run for a few minutes. You can drive 5 - 10 kilometers, after which conduct a visual inspection under the bottom of the Kalina. Make sure there are no signs of oil dripping from the filter or drain plug. Also check the level when the engine has cooled down. This will allow you to obtain an objective assessment of the condition of the fluid in the crankcase.

If you change the consumables on your Kalina correctly and on time, including engine oil, the car will be able to serve for many years without causing any problems and requiring money only for scheduled maintenance.

And in Soviet times there was an oil pressure gauge

Oil pressure indicator for VAZ-2106

Even on old Soviet cars there was a mechanical meter, and with just one glance it was possible to personally diagnose the condition of the oil inside the engine both at idle and at high speeds. However, now that no modern cars, including the VAZ-2112, are equipped with such a sensor from the factory, it is very difficult for beginners to determine the true value of oil pressure. This issue is discussed quite often in most forums, and our article will help everyone understand this.

Purpose of the oil

Engine oil is the most important element for stable operation and functioning of the engine.

After all, it is only thanks to oil that all moving parts, elements and components work without creating unnecessary friction. Therefore, the pressure in this system must be optimal, delivering oil even to the most inaccessible places. Due to a drop in oil pressure in the system, the moving parts lose their lubricating properties, which may cause excessive heating and result in failure. Based on this, it can be understood that stable pressure in the system is the key to long-lasting and consistently smooth operation of the engine.

Nowadays, fewer and fewer cars are equipped with an engine oil pressure sensor, if you look at budget foreign cars - I don’t even remember which ones have it. However, now there are enough cars of previous generations on the market, but they had such a sensor. For example, on some VAZ, UAZ, VOLGA, etc. Many people ask the question - what oil pressure should be in the engine, that is, what is the normal value and what is not? It is not always possible to find information specifically about your model, so this article will be useful to everyone...

THE CONTENT OF THE ARTICLE

You know, now manufacturers are simplifying the dashboard of cars more and more, for example, on mine ( Chevrolet Aveo T300 ) there is no longer even an engine temperature sensor, I’m already silent about the oil pressure sensor. It turns out that the manufacturers want YOU to ruin your iron horse faster, because you cannot control all the necessary parameters, and accordingly, if you operate it incorrectly, you will quickly come running to them to repair it. All this can be attributed to a conspiracy by the manufacturers. Although now they say everywhere that cars have become more reliable, different materials are used, etc., but practice shows the opposite, three to five years and it’s better to change the car. Oh, there were times - there were cars, there was complete control over the engine.

What value should it be?

To begin with, it is worth noting that pressure is measured in bars (BAR), because we are measuring liquid. It’s unlikely that anyone will tell you the exact values now, because the structures of the engines are different, but there is a certain normal interval.

AT idle speed it is 2 BAR (or 0.2 MPa), for most cars

At 4000 - 5000 rpm - this is 4.5 - 6.5 BAR (0.45 - 0.65 MPa), also for most brands

If we take our VAZ 2112 16 valve version, then the pressure at idle is slightly higher, about 1.5 - 2.5 BAR. But at 4000 - 5000 rpm 0.4 - 0.6 BAR.

Actually, I’ll end here, I think the information was useful, read our AUTOBLOG.

( 4 votes, average: 2.75 out of 5)

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Why do you need oil at all?

I often hear that oil is the lifeblood of the engine. This is not entirely true, of course, the comparison is very rough, but still, the engine will not function without oil (or it will, but not for a very long time).

Modern motor oils lubricate and protect all rubbing parts, and these are pistons (with their rings), shafts, bearings, etc. Let's just say that good oil extends the life of the engine by many thousands of kilometers.

BUT oil must flow through the system, just like blood itself through human vessels, if the oil is simply poured in a pan and does not go to the rubbing parts - IT IS USELESS!

POSSIBLE REASONS FOR VAZ 2106, 2108, ZMZ 406, 405

But there are also reasons that may appear on specific cars, since there is another factor that influences the occurrence of the problem - the design features of the engine. For example, on carburetor engines of the same VAZ-2106 or 2108, fuel can penetrate into the sump through the fuel pump. This unit on such engines is mechanically driven by a timing belt.

And due to damage to the pump membranes, fuel will penetrate inside the engine and mix with the oil, diluting it and increasing the level. But on the ZMZ-406 engine, the cause of the pressure drop, in addition to those described, may be damage to the oil pump drive. Because of this, the unit simply will not function normally, which will affect the performance of the lubrication system.

Mechanical breakdowns inside the engine should not be discounted, as a result of which the operation of the lubrication system is affected. For example, a break in the timing chain tensioner shoe, for example, on the same VAZ-2106, will lead to the torn part starting to hit adjacent surfaces, knocking out small pieces of metal. The chips formed as a result of such a breakdown will enter the lubrication system, and then settle in the filter, leading to a drop in pressure in it. Or on the same ZMZ-405, the pump is driven through an intermediate shaft, which is driven by a timing chain. If the sprocket of this shaft breaks (it can rotate separately from it), the pump will stop working.

And there are enough such nuances. But in any case, without eliminating the cause of the malfunction, you should not use the car, so as not to end up with expensive repairs later.

Lost oil pressure? We look for and eliminate the cause. Repair VAZ 2101

Source

What builds up oil pressure in the system?

Everything is simple here - there is a special oil pump that takes oil from the engine sump and pumps it through the system. It is usually installed in the engine sump and driven by special gears that the engine turns during operation.

Oil through many channels begins to be supplied to the right places under pressure, as I already wrote, this is the crankshaft and its bearings, the camshaft and its “bed”, pistons, and much more.

It is the pump that is responsible for the pressure; if the pump stops, the pressure indicator will drop to zero. THIS CANNOT BE ALLOWED! Because the engine will not be lubricated at all, which will lead to instant breakdown, especially at high speeds.

BUT often the oil pump does not stop, but simply begins to pump worse, this indicates its wear, which is why you need to know the oil pressure in the engine! To respond in time to the nearest oil pump failure.

Diagnostics of DDM on Lada Priora

Controllers for Priora cannot be repaired, since the main failure of the part will be rupture of the membrane or oxidation of the contacts of the closing group. The cost of a spare part is in the range of 100–200 rubles, so it is more advisable to replace the part. Sensor diagnostics are carried out in two ways:

pressure gauge;
mechanically.

Checking with a pressure gauge is a more accurate method of diagnosis; you need to unscrew the sensor with a 21 head and install a pressure meter in its place. If the device readings are below 0.65 kg/cm², this means that the pressure in the lubrication system is insufficient, the indicator lamp should light up, the sensor is faulty.

The mechanical method is used if there is no pressure gauge at hand. It is necessary to remove the controller from the lubrication system, do not start the engine, and crank the starter several times. If oil appears from the socket, the sensor needs to be replaced.

Lada 2112 R12 › Logbook › Oil pressure sensor from 2106 to 2112

I came across an article on the Internet that they write that the oil pressure sensor (pressure signal) from a VAZ 2101-2106 easily fits into 2110-2112... In the fall of 2011 I encountered such a problem, it turns out how easy it is to screw it up =) I decided to try installing one from a VAZ 2106, actually and photo report)

No. 1 Fitting or adapter from the VAZ 2106 (in the VAZ 2106, 1 edge goes to the oil pressure, and the 2nd edge goes to the oil light bulb) No. 2 The oil pressure sensor itself, which gives a signal and screws into the engine (sold complete with adapter No. 2)

We unscrew this marked sensor from the VAZ 2110 engine (the oil light is something like this)

We screw the unscrewed sensor from the engine into adapter No. 2 (from the oil pressure sensor) and insert it (there is no thread there, just insert it and that’s it, the kit includes 2 washers, don’t forget to put them) into the fitting (adapter No. 1 of the oil pressure sensor)

We screw the oil pressure sensor itself into the fitting (which gives a signal) and screw this whole thing back into the engine (where the oil light sensor was unscrewed from) and hook up the wire from the oil sensor (which gives a signal) and pull it to the oil pressure sensor (arrow)

Let's go start the car and admire it) it shows 2 points when cold - which is good)

Issue price: 580 ₽

Diagnosis of malfunction of the oil pressure alarm system

The first step, if the warning light on the Priora instrument panel does not light up, is to look at the wire connection on the oil sensor on the engine.

You need to turn on the ignition.
Open the hood.
Remove the oil filler plug and protective cap.
Make sure the wire is connected to the oil pressure sensor.
Remove the wire and press it to ground (engine block or sensor housing).
The light should light up. If this is so, then the limit switch is faulty.
If the indicator does not light up, then you need to disassemble the panel and check the light bulb first. Well, then the wiring.

But the remaining points are a completely separate topic that should be considered from a different perspective.

Replacing the “limit switch”

And there is no difficulty here. Without turning on the ignition, you need to follow the procedure from step 2 to step 5. After that, wipe the area around the device with a rag or rag. This is necessary to ensure that no debris accidentally gets into the hole. Using a socket wrench, unscrew the sensor and insert a new one. Tighten well until the gasket ring fits tightly into place. Check as described in the verification chapter. After this, start the engine and wait until the lamp goes out. All this applies to the Priora equipped with a 16-valve engine.

In very small quantities, this model is produced with an 8-valve engine. There, this sensor is also located in the head, but only at the back. Directly under the manifold, on the interior side. Near the timing belt. Like on regular VAZ 2108 and so on. Otherwise, all actions are similar.

Important! The Priora engine has 16 valves and reacts very painfully to a drop in load in the lubrication system! The fact is that there are hydraulic compensators there, and if the pressure is insufficient, a sharp, metallic knock instantly appears. This allows the driver to react accordingly

That is, when a knocking sound appears from the hydraulic valve compensators, first of all you need to check the serviceability of the alarm system. Well, only then, you can check the pressure with a mechanical pressure gauge by inserting it into the standard socket instead of the sensor.

Very useful video in pictures. It shows the process of replacing this unit on a 2112 engine. This is an absolutely identical process with the Priora engine with 16 valves.

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Engine oil pressure. Which should it be? We will also analyze the 16 valve engine from the VAZ 2112

THE CONTENT OF THE ARTICLE

You know, now manufacturers are simplifying the dashboard of cars more and more, for example, on mine (Chevrolet Aveo T300) there is no longer even an engine temperature sensor, I’m already silent about the oil pressure sensor. It turns out that the manufacturers want YOU to ruin your iron horse faster, because you cannot control all the necessary parameters, and accordingly, if you operate it incorrectly, you will quickly come running to them to repair it. All this can be attributed to a conspiracy by the manufacturers. Although now they say everywhere that cars have become more reliable, different materials are used, etc., but practice shows the opposite, three to five years and it’s better to change the car. Oh, there were times - there were cars, there was complete control over the engine.

Why do you need oil at all?

BUT oil must flow through the system, just like blood itself through human vessels, if the oil is simply poured in a pan and does not go to the rubbing parts - IT IS USELESS!

What builds up oil pressure in the system?

Alarm indication

Of course, now in almost all cars there is an emergency indication for a complete lack of pressure, this is known to us all - a “burning oil can”. If it does not go out for some time after starting, for example 10 - 20 seconds is one thing, it is almost always the fault of the oil filter. But if the lamp is constantly on, then this is already an alarm bell. Perhaps the oil pressure sensor has simply failed, or perhaps the oil pump has failed.

In any case, the emergency indication is very important, and I do not advise you to joke with it; nevertheless, this is fraught with a major overhaul of the engine.

Remember this rule, if the lamp comes on, then turn off the car and preferably immediately to a service station, either a tow truck, or in tow.

How to check oil pressure?

The actual check is carried out using a special device - a pressure gauge. It is also worth noting that you need to warm up the engine to operating temperature, usually 90 degrees Celsius.

If you measure with a cold engine, especially in winter, the pressure can jump to high values, from 0.5 BAR or even higher, but measuring with a cold engine is WRONG!

In order to check the pressure, you need to find the emergency sensor, which is responsible for the indication on the dashboard. It is worth noting that it is not always located nearby and it is convenient to unscrew it. We unscrew it, and in its place we attach the test output connected to the pressure gauge.

The check can then be divided into two options:

AT “idle” it is usually from 900 to 1200 rpm.
Then at “higher” speeds, usually 4000 - 5000 engine speeds.

It is also worth noting that if you unscrew the emergency sensor, the “oil can” will light up on your instrument panel, this is normal.

Now a short video showing how measurements are taken.

What value should it be?

AT idle speed it is 2 BAR (or 0.2 MPa), for most cars

At 4000 - 5000 rpm - this is 4.5 - 6.5 BAR (0.45 - 0.65 MPa), also for most brands

If we take our VAZ 2112 16 valve version, then the pressure at idle is slightly higher, about 1.5 - 2.5 BAR. But at 4000 - 5000 rpm 0.4 - 0.6 BAR.

Actually, I’ll end here, I think the information was useful, read our AUTOBLOG.

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We check and change the oil pressure sensor on Priora without the help of a technician

You can monitor the condition and level of lubrication of the car by measuring the oil level using a dipstick. In modern cars, this is monitored by an electronic control unit; for this purpose, a Priora emergency oil pressure sensor is installed. What this device is, how to check it, what malfunctions exist and how to replace it yourself is described in this article.

The regulator in question is an important element of the lubrication system of the Lada Priora car, equipped with an electronic control unit (video author – SoftFelix).

Purpose and location

The indicator is designed to warn the driver of insufficient oil pressure. It is located on the engine cylinder head near the oil filter under the exhaust manifold. To carry out diagnostics, the device must be removed.

Location in the engine compartment

The operating principle of the device is simple. Under pressure, the membrane gasket bends and changes its shape. It acts on contacts that close or open.

Device operation diagram

Typical malfunctions and methods for their elimination

If the oil pressure warning light does not come on when the ignition key is in the “on” position, the following malfunctions are possible:

broken wiring;
the light bulb burned out;
the regulator is faulty;
bad contact.

A broken wire is looked for using a test light and repaired by replacing the damaged wire. The burnt out light bulb is replaced with a new one. To eliminate the cause of poor contact, you need to clean the connections and check the reliability of the wire connections. A faulty regulator should be replaced.

DDM on Lada Priora

Diagnostic features

Before replacing the old device, it must be removed and checked. The easiest way to check is to plug in a known-good device into the network.

Another way is to screw a pressure gauge in place of the sensor. If the tester shows a pressure of 0.65 kgf/cm2 or more, this indicates that the system has normal pressure and the cause is a faulty device.

If you don’t have a pressure gauge at hand, you can check the sensor in the following way:

unscrew the regulator;
crank the starter without starting the engine;
If oil flows from the socket, then the sensor is faulty and needs to be replaced.

Instructions for replacing DDM

For safety reasons, replacement work should be carried out with the engine cooled down and wearing cloth gloves. From the tools you should prepare a key for “21”.

The procedure consists of a sequence of steps:

First, the minus terminal from the battery is disconnected.
For convenience, remove the air filter.
The DDM and around it should be wiped with a rag to prevent dirt from getting inside.
By pressing the wire block, disconnect it from the regulator.
Using a key, loosen the sensor and unscrew it from the socket.
We install a new device. In this case, a metal O-ring should also be installed.
Assembly is performed in the reverse order of removal.

Photo gallery “Replacing DDM with Lada Priora”

The procedure for replacing the DDM sensor can be performed even by a novice car enthusiast, but at the same time you can save money on visiting a service station and gain experience in repair work.

This video shows the process of removing the DDM on a VAZ 2114 (the author of the video is Delay Avto).

Alarm indication

Of course, now in almost all cars there is an emergency indication for a complete lack of pressure, this is known to us all - a “burning oil can”. If it doesn’t go out for some time after starting, for example 10 – 20 seconds is one thing, it’s almost always the oil filter’s fault . But if the lamp is constantly on, then this is already an alarm bell. Perhaps the oil pressure sensor has simply failed, or perhaps the oil pump has failed.

In any case, the emergency indication is very important, and I do not advise you to joke with it; nevertheless, this is fraught with a major engine overhaul .

Remember this rule, if the lamp comes on, then turn off the car and preferably immediately to a service station, either a tow truck, or in tow.

What to do if the sensor lights up

While the VAZ-2112 is operating, the oil pressure light on the dashboard may light up periodically.

The main causes of the malfunction are:

decrease in engine oil level;
electrical circuit break;
sensor failure;
failure of the oil filter;
clogging of the oil receiver structure.

Since there are many possible reasons, you will need to check each of them. First of all, the car owner should inspect the engine oil level, since this reason is considered one of the most common.

To do this, you will need to turn off the engine and give it time to cool, after which you will need to inspect the pan for the amount of oil that has leaked out. If the level is OK, then you should start checking for another reason, and it is best to entrust the work to professionals at a service station.

Thus, the operation of a car, especially a domestic one, requires a responsible and attentive attitude on the part of the owner.

If you regularly inspect all elements, systems or various devices, which include the oil pressure sensor, you can avoid any serious breakdowns and, as a result, costly repair work.