Priora engine: 8 and 16 valves, characteristics and service life of the internal combustion engine

Motor 126 and 127: working life, differences

These engines on Priora had a displacement of 1.6 liters (or 1596 cm3). Optimal for city sedans, the engine size of the Lada Priora gave a good combination of dynamics and consumption: along with very decent acceleration, fuel consumption does not exceed sky-high numbers. Both engines received good marks, because the car behaved perfectly in the city and on the highway.

127 motor - looks like this

In fact, the 126 Priora engine became the first sixteen-valve engine for this model, and the 127 is a modified version, “overclocked” by AvtoVAZ designers. In addition to the same engine displacement, they have other identical characteristics. The in-line type of arrangement of four cylinders provides a simplified design that can be repaired on your own.

The distributed multipoint injection system is involved in creating a good, rich fuel-air mixture (a lean mixture can lead to breakdowns). The cylinder diameter is 82 mm, the piston stroke is 75.6 mm, the compression ratio is 11. The “engines” fall under the Euro 4 standard, they are powered by gasoline with an octane rating of 95.

The 126 engine for the Priora received the following characteristics: 98 hp. (72 kW at 5600 rpm), acceleration to 100 km/h in 11.5 seconds (with manual transmission), city consumption 9.1 l - 100 km (manual transmission), maximum torque - 145 Nm.

The 127 engine for the Priora was upgraded to the following figures: 106 hp. (78 kW at 5800 rpm), acceleration to 100 km/h in 11.5 seconds (with manual transmission), city consumption 8.9 liters per 100 km (with manual transmission), maximum torque – 148 Nm.

The difference may not seem so noticeable, but this is a very small but strong step in design on the part of AvtoVAZ (this is where the change to sixteen-valve “engines” with a volume of 1.6 liters ended). For a car of the Lada Priora class, the engine power was sufficient.

In the same block it is necessary to say about the operating temperature. An absolutely normal operating temperature is considered to be between 90 and 95 degrees Celsius. Further, when the car is being pushed in a traffic jam, is basking in the sun, or for some other reason, but can still work - from 97 to 110 degrees. The engine is slow in places and wears out a lot, but you can still get to your destination. A temperature below 90 degrees is a direct sign indicating that the car has not yet warmed up, and it is better to wait in place until the arrow points to the coveted 80-90 mark.

Operating a car at temperatures above 110 degrees is dangerous because the service life of the engine is noticeably reduced - hot parts undergo very severe wear, overcoming the force of friction.

In general, the service life of the Lada Priora engine with a normal driving style and careful treatment is 200,000 km - after this mark the time comes when the “engine” requires major repairs. AvtoVAZ mentioned the timing belt separately as a recommendation, saying that it needs to be checked every 100,000 km (many car enthusiasts talk about the figure of 50,000 km).

All Lada engines have a problem, and it is related to the valves, which will be discussed further.

Performance characteristics

The Priora's 8-valve power plant has the following characteristics:

• the internal capacity of the cylinder working space is 1,597 l;
• the engine is capable of achieving power equal to 90 horses;
• inside a cylinder with a diameter of 82 mm a piston moves with a working stroke of 75.6 mm;
• the crankshaft rotates at a speed of 850 rpm;
• a car with such an engine consumes 8.5 liters of gasoline per 100 km when driving around the city. Driving on the open highway is characterized by a consumption of 5.7 liters;
• The power unit allows the car with an 8-valve engine to reach speeds of up to 167 km/h.

Dissatisfied with the result of their development, the manufacturers decided to improve the technical parameters of the engine for the Lada Priora. This is how a four-cylinder unit with 16 valves was created.

Recommendations for improvement

For the first time, they decided to increase the power of the new Priora 21126 engine at the factory in order to create a sports modification of it. Camshafts with increased lift, a lightweight connecting rod and piston group were installed, and the intake and exhaust tracts were modified. This is how the first domestic sports unit appeared, which was put into production, and they began to install it on the Lada Granta Sport model.

The technical characteristics of the engine are as follows: engine power from the Priora has increased to 118 hp. torque - up to 154 Nm at 4700 rpm, fuel consumption also increased to 7.8 liters per 100 km with a combined driving cycle. We will give a number of recommendations on how to independently increase the power of Priora engines:

1. The simplest and most affordable way is to install a zero-resistance exhaust tract. The essence of its work is to reduce the resistance of the path, as a result of which some of the power spent on overcoming this resistance will be released and become useful.
2. The same operating principle applies to the zero-resistance intake tract. Installing the receiver and throttle valve to 56 mm will allow the power unit to “breathe” more freely, and your Lada Priora will become several horsepower more powerful.
3. Deeper tuning - new camshafts with a sports configuration, allowing the intake and exhaust valves to open more. This will give a noticeable increase in the agility of the car, especially in city conditions.
4. Replacing the standard valves and connecting rod-piston group with a lightweight one will again release some of the useful energy of the unit and add it to the main power. Here you can kill two birds with one stone: install pistons with recesses, thereby eliminating the possibility of them “meeting” with the valves when the timing belt breaks.
5. We should not forget about CHIP tuning. After major changes in the engine configuration, its operating mode will definitely improve, and in order to optimize it and adjust fuel consumption, you need to do a flashing.

Recommendations are given taking into account that the power plant is in good technical condition. If this is not the case, when tuning it is worth replacing worn parts and oil in order to get the desired effect from the changes. As a result of the above measures, the Lada Priora will receive an additional 20-30 hp. without reducing the resource.

How many horses can Priora have in addition to this? Quite a lot, there are capabilities and components to increase the power ultimately to 400 hp. This is due to a radical modification of the power plant: boring the cylinders, grinding the cylinder head, replacing the injectors and fuel pump with more efficient ones, installing four throttle valves and a turbocharger.

We should not forget about modernizing the brake system. Such tuning will give excellent results in terms of power, but the engine life will be significantly reduced, and fuel consumption, on the contrary, will increase significantly.

16 valve engine design

In such 4-cylinder engines, each cylinder already has 2 pairs of intake and exhaust valves. To operate such a system, 2 camshafts are required. And for their coordinated work, a much more complex gas distribution mechanism is used. At the same time, 2 intake valves allow more fuel to be supplied to the cylinders per stroke - and hence a significant increase in power and efficiency. At the same time, fuel consumption is reduced thanks to the presence of 2 exhaust valves.

Hydraulic compensators are often used to press the valves against the shaft in such engines. Unlike 8-valve valves with mechanical pushrods, this system operates smoother and quieter. It also provides an additional increase in power and additional fuel economy.

Another specific feature of 16-valve engines, which becomes especially relevant against the backdrop of ever-tightening environmental requirements, such engines, due to more precise operation of the gas distribution mechanism, are safer for the environment.

For example, here is a diagram of the design of a 16 valve VAZ 2112 engine.

Engine test tables and graphs

As you can see from the table, the power of the 1.8-liter engine has a positive effect on its dynamics and even consumption. It would seem that it is fuel consumption that should increase, but test results prove the opposite.

Engine power

In this graph, the favorite is immediately visible; there are practically no equal to the 1.8-liter engine.

Performance characteristics

The Priora's 8-valve power plant has the following characteristics:

• the internal capacity of the cylinder working space is 1,597 l;
• the engine is capable of achieving power equal to 90 horses;
• inside a cylinder with a diameter of 82 mm a piston moves with a working stroke of 75.6 mm;
• the crankshaft rotates at a speed of 850 rpm;
• a car with such an engine consumes 8.5 liters of gasoline per 100 km when driving around the city. Driving on the open highway is characterized by a consumption of 5.7 liters;
• The power unit allows the car with an 8-valve engine to reach speeds of up to 167 km/h.

Dissatisfied with the result of their development, the manufacturers decided to improve the technical parameters of the engine for the Lada Priora. This is how a four-cylinder unit with 16 valves was created.

General characteristics

Initially, the car was equipped with an 8-valve engine from the VAZ 2114, about which car enthusiasts in practice know all the characteristics, in particular, what kind of service life it has in different modes. Therefore, the first “Priors” did not receive rave reviews from customers.

Subsequently, the car was equipped with its own 16-valve unit modification 21126 with a displacement of 1.6 liters and a power of 98 horsepower, which made the VAZ 2170 truly competitive. Dynamic performance has been improved, emissions into the environment and fuel consumption have been reduced. Relatively recently, an updated version of the 21127 engine with a power of 106 hp appeared. which has been installed on Priora since 2013. Comparative characteristics of all three units are given in Table 1.

Table 1

8 valve engine design

Such engines are used mainly on models in the entry-level price segment. Here there are 2 valves per cylinder: 1 for intake and 1 for exhaust.

Another important feature of such power plants is that only 1 camshaft is needed, which controls the gasoline injection and exhaust gas exhaust system. To operate it, a simple belt or chain mechanism is sufficient. Such a system is much easier to maintain and repair compared to complex timing belts of more expensive cars. And such an elementary design significantly affects the final cost of the car.

As an example, we give a diagram of the design of an 8-valve VAZ-2114 engine.

Updates and shortcomings

The table clearly shows how many horses the Priora had with the old power plant and how the power and torque changed as the update progressed. Here is a description of how the design features of the new units changed compared to the old ones:

1. The number of valves has increased, there are 4 of them for each cylinder. It's no secret what a positive impact this factor has on engine performance. The filling of the cylinder with the combustible mixture improves, the chamber is qualitatively emptied of combustion products (exhaust gases), the operation of the unit becomes more stable, power increases while fuel consumption decreases.
2. The compression ratio is increased by increasing the piston stroke. The new engine 21126 and 21127 now uses gasoline with a higher octane number, but at the same time the efficiency of fuel combustion increases, which has a positive effect on power. It’s impossible not to notice how the working volume of the Priora’s engine has increased thanks to the increased piston stroke.
3. In modification 21127, compared to 21126, the intake manifold was modified. How this affected the engine performance of the Priora can be seen in the table. Power increased by 8 hp. in addition, performance at low and medium speeds has improved.
4. The new engines on the Priora have better environmental performance and lower fuel consumption. This was achieved through such improvements as modernizing the crankcase ventilation system and reducing the weight of the piston group. Now crankcase gases are burned more intensively in the cylinders and the emission of harmful substances into the atmosphere has decreased.
5. Over the many years of operation of VAZ vehicles, a definite opinion has developed that the power units of Zhiguli cars do not last 150 thousand km until they are overhauled. Now, due to the use of new, higher quality components, the engine life has increased to at least 200 thousand km.

Despite the fact that the updated Priora engine is almost the most advanced domestic unit, it has its drawbacks. For example, when a timing belt breaks, the valves inevitably collide with the pistons and bend - this is its most serious drawback. How to eliminate it without waiting for trouble? It is necessary to replace the standard pistons with new ones, with special selections for the valves.

The remaining shortcomings are not so significant and they are usually associated with some kind of defect that can still be found on domestic cars. This could be increased noise from the operation of hydraulic compensators (often found on VAZ cars), an unexpectedly burnt gasket under the cylinder head, or floating idle speed. Or some unit of the attached equipment fails:

• a drop in fuel pressure in the system leads to difficulty starting the Priora engine and loss of its power;
• sensor malfunctions;
• air leaks in the fuel tract through the pipes;
• problems with the injector throttle valve.

pros

"Lada Priora", without a doubt, captivated many with its characteristics and price. However, its engine has a number of pros and cons, knowing which you can avoid many problems. Among the advantages are the following:

• Reliability. Yes, the Lada engine is far from the BMW, but it copes with the assigned tasks with a bang. Simple and good-quality, it can last up to 200 thousand kilometers, and after major repairs it can last the same amount.
• Cheap consumables. Engine parts can hardly be called cheap by definition, but repairs from Priora will cost much less than cars from foreign manufacturers.
• The power for a lightweight Lada 2170 is quite sufficient to accelerate at a sufficient speed. The 21126 engine with 16 valves can produce power up to 100 horsepower and reach speeds of up to 180 km/h.
• Environmentally friendly. The Priora engine fully complies with European quality standards and emits less exhaust gases into the atmosphere than its predecessors.
• Good traction at both high and low speeds appeared after modification of the exhaust manifold.
• The efficiency of the 16-valve engine is significantly greater than that of previous generations of Lada due to its design. Because of this, the car consumes less fuel.

As you can see, there are many advantages. It is not difficult to understand why the Lada Priora became so popular in Russia. The Russian-made car was created for our roads, and its design took into account all the pitfalls. But not a single thing can be ideal, so disadvantages can also be found in the VAZ-2170.

How much does engine 126 and 127 cost?

Engine 126 has catalog number 21126100026030, sells for about 107,000 rubles, engine 127, respectively, has catalog number 21127100026030, its price is slightly higher by 3-5 thousand rubles. The price on the secondary market will be significantly lower (up to 20-25 thousand rubles), but the savings will not pay off - a used “engine” can last no more than 1000 km, this is a real lottery.

How to find out what engine is in a Priora

You can find out by looking at the plate on the left glass of the rack, where the engine number is written on the edge. From it you can understand the 8-valve unit, or 16. You can also recognize the modification 21126 or 21127.

List of car models in which it was installed

Engines from VAZ on Priora were installed on the following modifications of cars of the domestic manufacturer:

• Lada Priora Hatchback restyling from 2013, three-door;
• Lada Priora Hatchback restyling from 2013, five-door;
• Lada Priora Station Wagon;
• Priora Hatchback restyling from 2010;
• Priora Station Wagon 2008;
• Priora sedan 2007.

Despite many positive reviews about the modified VAZ engines, they have drawbacks. We'll look at which ones in the next block. We will only touch on engine 21126.

Signs of the need for internal combustion engine repair

The reasons why the operation of the engine is disrupted are arranged in a small list, starting with refusal to start and ending with floating idle speed (this problem was removed on the 127 “engine”). Not all breakdowns end in capital damage - sometimes it’s enough to add oil, sometimes it’s enough to adjust the ECU settings.

Compression reduction

A decrease in cylinder compression below 16 atmospheres is a bad sign. Such a high limit corresponds to a compression ratio of 11.

If the compression decreases (or vice versa increases), then the “engine” will have to be rebuilt.

Knocks in the engine

Engine knocks can come from several points. These could be hydraulic compressors, timing belt rollers or pins. The knocking noise could also be caused by low oil level. The answer to the question will be given by a thorough detailed inspection of all parts of the unit and checking the oil level.

Blue smoke from the exhaust pipe

The blue smoke that comes from the exhaust pipe appears when oil enters the combustion chamber. It can leak either from the valves or from under the piston. The result is the same: the oil is eaten up and blue smoke pours out of the chimney. Once the leak is located, half the problem will already be solved.

Troit motor

Sometimes in the cold the engine may stall - don’t be alarmed by this, because it may simply be one of the spark plugs that fails. In this case, we advise you to simply restart the engine and it will stop running.

Engine

Lada Priora has undergone changes several times, both externally and technically. The appearance, power plant and transmission changed.

Below is an example of engines that were installed on the VAZ 2170-72.

Engine 21116 (8 valves)

This engine was installed on the VAZ 2114 and Lada Kalina, and was later inherited by the Priora. The power of this internal combustion engine is 80 hp. with a volume of 1.6 liters, which is very small. Such an engine does not have good dynamics, and it is difficult for it to “drag” the body of the Priora.

Pros:

• Does not bend valves;
• Easy to maintain;
• Cheaper spare parts;

Minuses:

• Low power;
• Noisiness;

The installation of such an engine continued until 2022.

Engine 21126 (16 valves)

16 valve engine with more power and torque compared to 116. It is a modified model of the 124 engine. Its power is 98 hp. with a volume of 1.6 liters.

Pros:

• Great power;
• No noisy operation;

Minuses:

• Bend valves when the belt breaks;
• Expensive spare parts;

Engine 21127 (16 valves)

The modified 126 engine received the index 21127; the intake in this engine was changed, thereby increasing the power to 106 hp. with the same volume of 1.6 liters. They began to install a new cable gearbox for this engine.

Pros:

• High power;
• No noisy operation;

Minuses:

• Bend valves;
• Expensive spare parts;

Engine 21128 (16 valves)

This engine was specially designed for more powerful Lada cars with the “Super Auto” nameplate. The power of this engine has increased, as has its volume. The number of horsepower in the super car engine increased to 123, and the volume to 1.8 liters, which radically affected the dynamics of the car.

Pros:

• Good dynamics and high power;

Minuses:

• Bend valves;
• More expensive spare parts;

What is the difference between an 8 valve engine and a 16 valve engine?

The most common gasoline engine option, found in the vast majority of entry-level and middle-class passenger cars, is a 4-cylinder engine. Such units combine relatively high power, efficiency and an affordable price. However, between “fours”, even those installed on the same model, there may be significant differences in performance and technical characteristics. One of the main reasons for this difference is the different number of intake and exhaust valves per cylinder. And here the debate continues to this day - some zealously defend 8-valve 4-cylinder engines, others are convinced that a 16-valve engine is better in all respects. Let's try to figure out what exactly is the difference between them and which engine is better - with 8 or 16 valves?

Where is the engine identification number on the Priora?

The engine code is found using these three means:

• lighting device;
• car passport;
• vehicle operating instructions.

The Vin code of a car from the VAZ manufacturer can be located in several standard places, regardless of the modification of the car or the number of valves:

• on the cylinder on both sides or on one;
• near the hole where the amount of engine lubrication is checked;
• where the engine is connected to the automatic or manual transmission;
• at the base of the corrector.

Sometimes the motor coding may be located in a different place. But this rarely happens.

Engine number on 16 valve

The engine number of 16 valves on a Priora can be viewed by first removing the air filter housing. Disconnect the corrugation. Using a mirror, the car owner will see two rows of numbers. Since the coding is located on the cylinder block below the thermostat housing.

To read the numbers and compare with the documentation, you will need to use a rag and WD 40 to clean the metal. The numbers tend to get dirty with dust.

Engine number on 8 mi valve

On an eight-valve Lada Priora engine, the engine coding is in the same place as on a 16-valve engine. The numbers are located on the end of the cylinder block, above the clutch housing. But there are also exceptions.

For example, on new models, the manufacturer may change the location of the motor code. In this case, he usually indicates the location of the VIN code in the technical passport for the car.

Lada Priora is the most stolen car among other domestic vehicles. Therefore, a car owner should always have an idea where the engine coding is located in order to refuse to buy a stolen car. Therefore, next we will talk about exceptions to the location of plates with vehicle data.

Powertrain Maintenance

The frequency of maintenance of the Priora engine by the manufacturer is 15 thousand km. It is recommended to carry out the first maintenance after 3 thousand km. The main attention should be paid to checking all attachment points for attachments. During this same service, the first oil and oil filter change is carried out. If the engine is 8-valve, it is worth checking the valve clearances. For a 16-valve engine, this measure is not necessary, since hydraulic compensators are installed on this power unit. Similar work is carried out after 15 thousand kilometers of the Priora.

After the odometer reaches a value of 30 thousand km, in addition to changing the oil and oil filter, the spark plugs and power system filters require replacement. Often, at this mileage value, the timing tension pulley gradually begins to fail. If the Priora has an 8-valve engine, it will not be superfluous to replace the valve cover gasket.

Design Features

All internal combustion engines on Priora operate at a temperature of 95 degrees. They are able to withstand such high degrees thanks to a special alloy of the cylinder head, which does not deform when heated to high temperatures.

However, if it’s hot outside, the engine quickly heats up and in traffic jams it starts to push and stall. Operating a power device at temperatures above 110 degrees is dangerous for it. The lifespan is reduced, rubbing parts wear out quickly.

Crank mechanism

The engine pistons are made of an alloy of aluminum and silicon. This ensures their high wear resistance and temperature resistance. The head of each piston is cylindrical with a flat bottom. The skirt is oval in cross section and barrel-shaped in longitudinal section.

To improve and speed up the running-in of the mechanism, the entire surface of the piston is coated with tin. And compression rings are cast from cast iron. The outer surface of the upper ring, which is adjacent to the cylinder, is coated with chrome plating. This increases the lifespan of the ring.

The height of the compression rings is 2 mm, and the height of the oil scraper ring is 4.9 mm. The piston pins are made of low alloy steel. They are selected for the pistons with minimal clearance. This is necessary to prevent your fingers from knocking while working.

timing belt

The timing belt of the Priora car is made of a durable belt. Many car owners say that it is the gas distribution mechanism that is the problem with Priora engines. At 100 thousand kilometers you may find cracks on the timing belt or light chips in the rubber. This means that he is living his last kilometers. When replacing a belt, it is best to change the entire gas distribution mechanism. Namely, sprockets, a crankshaft toothed pulley with a washer, sometimes replace the generator belt.

The belts that are installed in engines on Lada Priora have 137 teeth. If one wears out, slippage begins, and sometimes the belt can hit the valves. As a result of the break, it hits the valves with 100% accuracy and bends them.

Therefore, experienced mechanics recommend putting the car in for preventive maintenance every 12 months or 100,000 kilometers. Thus, the car owner will avoid major engine repairs or complete replacement.

Systems

The closed liquid cooling system on the Priora allows the engine to cool better on hot days or when idling in traffic jams. It effectively removes heat and prevents the Priora from overheating even at temperatures of plus fifty Celsius.

The power supply system on the car is injection. Carburetor systems are already a thing of the past. Now the fuel is injected into the combustion chamber at a certain angle, oil and air are supplied and then everything is mixed. Such innovations ensured stable operation of the motor.

Similar article Technical characteristics and maintenance of the 603 Mercedes engine

The upgraded crankcase ventilation system does not allow large amounts of exhaust gases to be released into the atmosphere. The reduction and modernization of the connecting rod and piston group reduced the amount of gasoline consumed by the Priora engine.

Let's look at the list of cars on which these engines were installed.

What is the danger of a broken timing belt on an 8-valve Priora?

When purchasing a new car, prudent owners, first of all, are interested in which engines bend valves and which do not. Nobody wants to put their car in for major repairs after a short period of use.

Lightening the connecting rod and piston group as a result of improved design led to the fact that the space for the valve recesses turned out to be very limited. Therefore, malfunctions in the timing system are fraught with unpleasant consequences. If the belt breaks unexpectedly, the valves bend.

It should be noted that there is some advantage of the 8-valve engine over the 16-valve engine. Since the pressure on the gas distribution mechanism is lower than that of the VAZ 21126, the problem is not so pressing. The likelihood that the VAZ 21116 power plant has bent valves is significantly reduced.

If you examine the possible causes of damage to the timing belt, one of the first things you can point out is the discrepancy between the energy transmitted from the wheels to the power unit and the force produced by the starter. This happens when trying to push start the car. In this case, the belt misses several teeth due to excessive load. The car won't start.

Regular inspection and timely replacement of the belt ensures that if it is unexpectedly damaged, the piston will bend the valve.

The only engine model for the Lada Priora that did not suffer from timing belt damage was 21114. Unfortunately, this reliable unit was completely supplanted by the 116 version from Granta.

Recommendations for improvement

For the first time, it was decided to increase the power of the new Priora 21126 engine at the factory in order to create a sports modification of it. Camshafts with increased lift, a lightweight connecting rod and piston group were installed, and the intake and exhaust tracts were modified. This is how the first domestic sports unit appeared, which was put into production, and they began to install it on the Lada Granta Sport model.

The technical characteristics of the engine are as follows: engine power from the Priora has increased to 118 hp. torque - up to 154 Nm at 4700 rpm, fuel consumption also increased to 7.8 liters per 100 km with a combined driving cycle. We will give a number of recommendations on how to independently increase the power of Priora engines:

1. The simplest and most affordable way is to install a zero-resistance exhaust tract. The essence of its work is to reduce the resistance of the path, as a result of which some of the power spent on overcoming this resistance will be released and become useful.
2. The same operating principle applies to the zero-resistance intake tract. Installing the receiver and throttle body to 56 mm will allow the power unit to “breathe” more freely, and your Lada Priora will become several horsepower more powerful.
3. Deeper tuning - new camshafts with a sports configuration, allowing the intake and exhaust valves to open more. This will give a noticeable increase in the agility of the car, especially in city conditions.
4. Replacing the standard valves and connecting rod-piston group with a lightweight one will again release some of the useful energy of the unit and add it to the main power. Here you can kill two birds with one stone: install pistons with recesses, thereby eliminating the possibility of them “meeting” with the valves when the timing belt breaks.
5. We should not forget about CHIP tuning. After major changes in the engine configuration, its operating mode will definitely improve, and in order to optimize it and adjust fuel consumption, you need to do a flashing.

Recommendations are given taking into account that the power plant is in good technical condition. If this is not the case, when tuning it is worth replacing worn parts and oil in order to get the desired effect from the changes. As a result of the above measures, the Lada Priora will receive an additional 20-30 hp. without reducing the resource.

How many horses can Priora have in addition to this? Quite a lot, there are capabilities and components to increase the power ultimately to 400 hp. This is due to a radical modification of the power plant: boring the cylinders, grinding the cylinder head, replacing the injectors and fuel pump with more efficient ones, installing four throttle valves and a turbocharger.

We should not forget about modernizing the brake system. Such tuning will give excellent results in terms of power, but the engine life will be significantly reduced, and fuel consumption, on the contrary, will increase significantly.

Pros and cons of an 8 valve engine

This engine design, despite its venerable age, has many advantages:

• simplicity of design - an 8-valve engine has significantly fewer wearing parts, and accordingly, its repair will be easier and cheaper;
• lack of hydraulic compensators - motors of this type simply do not need them, so the design is further simplified and cheaper;
• less demanding on oil characteristics - 8-valve engines allow the use of lower quality lubricant, which is noticeably cheaper;
• less sensitivity to the quality of gasoline - most of the 8-valve valves used today were developed at a time when there was no better fuel than 92;
• small size - one camshaft takes up much less space, so such engines are more compact than their 16-valve counterparts, and this makes access to attachments easier.

However, there are also many significant disadvantages:

• less power - intake and exhaust through 2 valves significantly limits the amount of fuel supplied to the cylinders and the total engine power;
• slightly higher fuel consumption - the reduced throughput of 1 pair of valves forces the engine to put more effort into pushing exhaust gases into the manifold, and accordingly more energy is spent on this;
• noise at high speeds - the pushers wear out during engine operation, gaps form, which is why the engine begins to make noticeable noise;
• the need for more frequent valve adjustments - if this is ignored, engine performance will drop, and fuel consumption, on the contrary, will increase.

Rules for long-term use

Surely every Priora owner wants to operate his car without unnecessary unexpected costs and is thinking about how to increase the car’s service life. To do this you need to follow a few simple rules:

1. The power unit of the VAZ 2170, even without various improvements, has sufficient potential for “spirited” driving. But in order to save it and extend its life, such driving should be avoided. Smooth acceleration and maintaining a stable speed not only on the highway, but also in the city will help extend the life of the engine and save fuel and your own money. The maximum permissible speed on the highway should be no higher than 120 km/h, the optimal speed is 100-110 km/h, and it is important to maintain stability.
2. It is important to timely replace consumables, that is, oils in units, filters, spark plugs, high voltage wires, generator and timing belts, and coolant. The interval between engine oil changes depends on its quality and chemical base. Mineral-based oils should be changed more often, synthetic oils less often. You should never determine the quality of motor oil by its color. If it has acquired a black tint, this does not mean that the oil is bad - it means that an excessive amount of combustion product deposits is formed in the engine. First of all, you need to find the source of the carbon deposits and eliminate it, and then change the oil.

• The new engine must be properly broken in, and then the oil must be changed, following the manufacturer's instructions. When running in, avoid increased loads, sudden movements of the accelerator pedal, and do not exceed the speed specified in the instructions.
• Always monitor the engine coolant temperature, check the operation of the electric cooling fan, thermostat and temperature sensor. Overheating is the main enemy of the piston group; every time the temperature is exceeded, it wears out intensely, and the life of the unit is sharply reduced.

“Lada Priora” is a modern high-speed domestic car that will bring its owner a lot of positive impressions and driving pleasure, provided that the engine is cared for and properly modified and operated.

What to do if the number is interrupted

If it turns out that the car owner purchased a stolen car, but the code was broken, then the traffic police will no longer return the documents for the vehicle. In the best case, you will have to buy a new engine, in the worst case, you will have to sell the Lada Priora for spare parts.

It is no longer possible to register or deregister Priora. Riding on it will also be prohibited. That's why it's so important to pay close attention to the VIN code when buying a car.

Engines Lada Priora 8 valves

VAZ 21114 – 80 hp
120 Nm This power unit was inherited from the Lada Priora from the previous VAZ 2110 model and was installed only on sedans or hatchbacks in the simplest Standard configuration. Such an engine is rare, since already in 2011 it gave way to the 21116 engine.

VAZ 21116 – 87 hp 140 Nm

There were relatively many design changes in the updated 8-valve unit: a lightweight piston from Federal Mogul, an intake manifold with an electronic throttle, a particularly durable Gates belt with a service life of 200,000 km and an automatic tensioner. The downside is that there are no recesses in the pistons and now the valve bends when the belt breaks.

Sedan 2007 – 2015 1.6 l 21114 manual gearbox51.6 l 21116 manual gearbox5

Main differences between 16 and 8 valve engines

We have figured out the features of these types of engines, now we will specify the differences between them.

8-valve engines are much simpler in design, which has a positive effect on the price of the entire car, its maintenance and repairs. However, they are significantly inferior in power to 16-valve analogues with the same displacement - on average, the difference in power here is 15-25 hp. Because of this, engine response, acceleration dynamics, and maximum speed suffer.

At the same time, 4-cylinder engines with 8 valves are much simpler and more affordable to repair. There are significantly fewer elements that can break, and if something does break down, the breakdown can be repaired with less effort. And spare parts for such engines are usually cheaper.

With efficiency, everything is not so clear. Yes, 8-valve engines consume more fuel - but at the same time, they can be filled with lower quality, inexpensive gasoline. Oil may not be the most expensive either. Another controversial point is the use of hydraulic compensators. They are installed on 16-valve engines and eliminate the need for systematic valve adjustment. At the same time, they sometimes fail, and replacing them will cost a pretty penny.

One more important point should also be noted: in 16-valve engines, the piston and valves can jam together - and this inevitably leads to costly repairs, and sometimes to a complete replacement of the engine. In principle, 8-valve patients do not have such a disease. However, such jamming occurs, as a rule, on Russian and Chinese cars, which by default are inferior to the Western and Japanese automobile industry.

Lada Priora engines 16 valves

VAZ 21126 – 98 hp
145 Nm In the Norma and Lux ​​trim levels, a 16-valve internal combustion engine was installed, and it was immediately a modernized series with a lightweight piston from Federal Mogul and a durable belt from Gates Rubber Company. Another advantage is hydraulic compensators, which save you from adjusting the valves. This is the most popular Priora unit; it was installed from the very beginning until almost the end of production.

VAZ 21127 – 106 hp 148 Nm

The 2013 update brought a new engine with a variable-length intake manifold. It was with this engine that completely new gearboxes appeared: the manual VAZ 2180 with a cable drive, as well as the VAZ 2182 robot, created on its basis.

Station wagon 2009 – 2015 1.6 l 21126 manual gearbox51.6 l 21127 manual gearbox5

Which is better 16 valves or 8

So, let's try to determine which option and in which situation will still be preferable. New cars with 4-cylinder engines offered in showrooms are almost always equipped exclusively with 16-valve engines; such engines have already displaced the outdated 8-valve design from the market. However, some manufacturers, usually from the lower price segment, still have such simplified options. Their main advantage is just a more affordable price.

But, if you have the opportunity to pay extra, the car is chosen for personal, not commercial use, and you are not going to service it yourself, then it would be more reasonable to buy a car with a 16-valve engine. It will delight you with higher power and dynamics, as well as efficiency and reduced noise.

In a situation where the car is taken from hand, 8-valve options may be preferable. The fact is that they are structurally simpler and more unpretentious in the choice of fuel and oil, respectively, here the chance of getting a car with a “live” and peppy engine will be higher than in the case of more sensitive 16-valve engines.

It is impossible to say unequivocally which option is better. It is necessary, first of all, to take into account your own goals and objectives, financial capabilities, and the conditions in which the car will be operated. If your primary requirements are reliability and unpretentiousness, then it makes sense to take a closer look at the 8-valve modifications. If speed and power are important to you, then it is better to choose 16-valve engines.

Lada Priora engine problems

The main malfunctions of all 1.6-liter engines are similar and we have summarized them in one table:

— weak electrics: unreliable sensors, electronic throttle glitches, and so on

— a thermostat that often sticks, which results in overheating and gasket breakdown

- oil leaks, with it getting into the spark plug wells, onto the timing belt and other places

— timing belt break due to wear, roller wedge or pump, which is fatal for the internal combustion engine

Why we love and don’t love the 126 Priora engine

The most common problems of internal combustion engines 21126

Priora engine malfunctions are largely similar to each other. All of them have been noted by car owners to have weak electrical systems. The sensors are unreliable and begin to fail when they are slightly exposed to moisture or overheated. In winter, glitches are especially pronounced.

Car owners who have overheated or ruptured the cylinder head gasket often seek engine repairs. The culprit is a sticky thermostat at times. It displays temperature data incorrectly for a long time. If the car owner forgets to change the oil and filters, antifreeze or coolant, then overheating is inevitable.

Oil is leaking. At times, through overheated seals and packings. Lubricant gets on the belt, reducing its life. Once in the spark plug wells, the engine stops working. And again, car owners come to our service center for repairs.

A wedged oil pump roller or a broken timing belt becomes fatal to the engine. In this case, only a major overhaul or a swap to another Priora power unit helps.

Factors affecting the service life of the VAZ 2170

According to the manufacturer, the ICE 21126 with sixteen valves has a stable operation duration of 200 thousand kilometers. After a certain mileage it is necessary to carry out major repairs. Taking good care of the VAZ 2170, proper maintenance (MOT) and timely replacement of damaged components and parts will lead to a long service life of the vehicle.

Reasons affecting the service life of the power unit:

1. Engine overheating. Elevated temperatures of a running engine negatively affect the overall service life of the motor. Maintaining the operating temperature of the power unit elements at a constant level significantly extends its operating time.
2. Fuel. The vehicle's owner's manual contains detailed information about the recommended brand of gasoline. Filling the 16-valve Priora engine with fuel must be of proven quality.
3. Machine oils. Which oil is best to fill, its brand and how much lubricant is needed is indicated in the accompanying documentation for the car. The 126 sixteen valve engine accepts semi-synthetic and synthetic motor oils most well. A complete oil change should be carried out annually or after a mileage of 15 thousand kilometers.

Sources

• https://priorik.ru/126-i-127-dvigatel-na-prioru-16-klapanov-resurs-priznaki-polomki/
• https://VmyatynNet.ru/na-zametku/priora-dvigatel.html
• https://medwegonok.ru/dvigatel-vaz-priora-16-klapanov-tehnicheskie-harakteristiki/
• https://1ladapriora.ru/tyuning/dvigatel-harakteristiki.html
• https://enginehack.ru/dvigatelya-priory/
• https://dvsoff.ru/tip/8-i-16-klapannye-dvigateli-priory
• https://otoba.ru/auto/lada/priora-dvigateli.html

What is the danger of a broken timing belt on an 8-valve Priora?

When purchasing a new car, prudent owners, first of all, are interested in which engines bend valves and which do not. Nobody wants to put their car in for major repairs after a short period of use.

Lightening the connecting rod and piston group as a result of improved design led to the fact that the space for the valve recesses turned out to be very limited. Therefore, malfunctions in the timing system are fraught with unpleasant consequences. If the belt breaks unexpectedly, the valves bend.

It should be noted that there is some advantage of the 8-valve engine over the 16-valve engine. Since the pressure on the gas distribution mechanism is lower than that of the VAZ 21126, the problem is not so pressing. The likelihood that the VAZ 21116 power plant has bent valves is significantly reduced.

If you examine the possible causes of damage to the timing belt, one of the first things you can point out is the discrepancy between the energy transmitted from the wheels to the power unit and the force produced by the starter. This happens when trying to push start the car. In this case, the belt misses several teeth due to excessive load. The car won't start.

Regular inspection and timely replacement of the belt ensures that if it is unexpectedly damaged, the piston will bend the valve.

The only engine model for the Lada Priora that did not suffer from timing belt damage was 21114. Unfortunately, this reliable unit was completely supplanted by the 116 version from Granta.

Source