Novice car owners often want to know whether the 21126 Priora engine really bends the valves? Because there are rumors that the Priora engine bends valves due to the fact that manufacturers have forgotten about reliability in the pursuit of efficiency and increased power.
Let's see if this is as experienced car owners describe.
Work resource
The working life of the VAZ engine is 200 thousand km. Next, the car owner has to put the engine in for major repairs. The timing belt needs to be checked every 50 thousand kilometers. According to experienced car owners, it is because of a broken circuit that the valves bend.
The engine does not like overheating, which means it does not like the lack of oil. Car owners should carefully monitor the presence of lubricant inside the engine. Without oil, the VAZ21126 will overheat greatly, which means the engine’s already short lifespan will become even shorter.
The working life of the chain may be less than the life of the motor itself. But a broken timing belt takes valves and pistons with it. This disease was not present on VAZ 21124 engines. But such engines were installed only on Standard class Priors, that is, cheap modifications of domestically produced cars.
Similar article Installation of ignition and distributor drive on a 402 UAZ ZMZ engine
Other reasons that affect the life resource:
- fuel quality. The operating book indicates the brand of fuel that the engine requires. Do not underestimate the figure under any circumstances;
- quantity and quality of oil. Experienced mechanics do not recommend pouring or adding lubricant if the car owner changes the oil himself. Do everything strictly according to the level. Such engines love semi-synthetic or fully synthetic lubricants.
Following the rules described above, the motor can last the stated 200 thousand kilometers.
Attention! Pour new oil strictly into the filler neck. You can use a funnel for the procedure.
Valve clearance adjustment interval
Some readers in the discussion of the article cited the Kia Rio and Hyundai Solaris as examples, arguing that they require valve adjustment every 30 thousand kilometers. Like, more often than with a VAZ engine. This is also not entirely true: the manual of Korean bestsellers says that a check is required once every 90,000 km. Usually it shows that you can drive up to 150,000 km. But VAZ eight-valve engines need adjustment much more often. According to the regulations - once every 45,000 km. And the experience of operating editorial cars confirms these figures. This procedure can be done less frequently only using high-quality oils and subject to regular replacement every 7,500 km.
How to find out what engine is in a Priora
You can recognize the modification of the Lada Priora internal combustion engine by looking at the metal plate. The engine number is stamped on this plate, and the car owner can also understand whether the engine has 16 valves or not. There is a metal plate on the left glass of the counter.
On which engines do the priors bend the valves?
Only on one Lada Priora engine does the timing chain fail to bend the valve. This is a VAZ 21114. On all the others, the valves bend after a breakdown. Even a small crack missed by the car owner during inspection can be the beginning of a major repair. Or maybe even a complete replacement of the engine in the Lada Priora.
There is one explanation for this. The manufacturer strives to lighten the engine. Increase fuel economy. An increase in power with a decrease in weight leads to the fact that the reliability and reliability of the timing belt is impaired.
Moreover, not only a breakdown can bend the valves on the VAZ21126 engine. Even just jumping the chain from one tooth to three leads to bending of all intake valves.
You can see how the valves are bent in action in this video.
On which engines the valves do not bend when the timing belt breaks?
The only internal combustion engine on which the valve does not bend is 21114. On all other engines 126 or 127 (127 is an improved 126), as well as on some others that are installed on the Lada Priora, the valve bends after the timing chain of the car breaks.
Similar article Technical characteristics of engine 21128
VAZ 2110 injector 8 valves, characteristics, timing device photo
An injector with 8 valves with a volume of 1.5 liters received the engine index VAZ-2111, a more powerful unit with a volume of 1.6 liters (8-liter) received the index VAZ-21114. Recently, modifications of the 21114 engine have been produced; they are installed on almost all today’s Lada models, albeit under a different index.
Today we will talk about the design of the 8-valve injector of the VAZ-2110 as well as the characteristics of this power unit. In our photo at the beginning of the article you can see how the injection engine of the “ten” looks under the hood of the car.
So, how does the VAZ 2110 8-valve injector work? Firstly, the main difference between the carburetor version of the engine and the injector is the supply of fuel to the combustion chamber. If in a carburetor engine the combustible mixture is sucked into the cylinders under the influence of vacuum created by the pistons, then in an injection unit the fuel is injected under pressure. It is because of this that the entire design of the injector and carburetor “ten” fuel systems is different.
It all starts in the gas tank, where an electric fuel pump is installed, whose task is to create the necessary pressure in the rail. From the ramp, fuel under pressure is injected into the combustion chamber through nozzles. The entire injection process is controlled electronically, which opens and closes (via a return spring) the injector solenoid valves, injecting fuel into the engine. But the electronics in the VAZ 2110 8-valve injector do not work on their own, but are guided by signals from pressure sensors in the fuel system, air sensors and throttle position. There is none of this in the carburetor “ten”.
In this regard, let's talk about the pros and cons of the VAZ 2110 8-valve injector. On the positive side, it can be noted that the operation of the injector is more stable, the engine produces more power and torque, while fuel consumption is less than in the carburetor version. But if a carburetor VAZ 2110 can be repaired with almost bare hands, then the injection version requires diagnostic equipment, without which it can be extremely difficult to identify the problem. After all, if one of the sensors turns out to be faulty, then your injection engine may not start or work intermittently.
Below are detailed characteristics of the VAZ 2110 injector 8 valves with a working volume of 1.5 and 1.6 liters.
Engine VAZ 2111 1.5 l. 8-valve injector
- Working volume – 1499 cm3
- Number of cylinders – 4
- Number of valves – 8
- Cylinder diameter – 82 mm
- Piston stroke – 71 mm
- Power – 76 hp (56 kW) at 5600 rpm
- Torque – 115 Nm at 3800 rpm
- Compression ratio – 9.9
- Power system - distributed injection
- Acceleration to 100 km/h – 14 seconds
- Maximum speed – 167 kilometers per hour
- Average fuel consumption – 7.2 liters
Engine VAZ 21114 1.6 l. 8-valve injector
- Working volume – 1596 cm3
- Number of cylinders – 4
- Number of valves – 8
- Cylinder diameter – 82 mm
- Piston stroke – 75.6 mm
- Power – 81.6 hp (60 kW) at 5600 rpm
- Torque – 115 Nm at 3800 rpm
- Compression ratio – 9.6
- Power system - distributed injection
- Acceleration to 100 km/h – 13.5 seconds
- Maximum speed – 170 kilometers per hour
- Average fuel consumption – 7.6 liters
Timing device VAZ 2110 injector 8 valves
Many people are concerned about the question: Do the valves on the VAZ 2110 injection engine bend? No, it doesn’t bend, the 8-valve injector does not suffer from this defect. But this does not mean that you should not monitor the timing belt. Since loosening and subsequent jumping of the belt by a certain number of teeth will lead to inevitable problems
It is worth paying special attention if engine oil gets on the belt; an oiled belt will not last long. Below is a detailed image of the timing diagram of the 8-valve injection engine “tens”
See the photo below.
When replacing the timing belt on a VAZ-2110, it is necessary to clearly align the marks on the camshaft and crankshaft pulleys; without this, the engine will not operate normally. Another important point is that when the tension roller moves to its original state, the marks shift as the belt tension changes. Therefore, carefully check whether the timing marks are clearly aligned before putting on the cover covering the timing belt.
Is it possible to tune the Priora 126 engine?
Tuning the 126 engine from Lada Priora is possible. But again, an increase in power will lead to a decrease in the life of the car. Before the car owner gets ready to do tuning, let him ask himself this question.
What do they do to increase the power of the 126 motor:
- install the receiver;
- change the injectors to type 440 cc;
- install lightweight valves;
- the throttle valve diameter is made equal to 54 mm;
- exhaust circuit 4 – 2 – 1.
Let's look at the video to see what other methods of tuning VAZ 126 and 124 engines are available.
Why does the belt break?
The valve bends when the timing drive breaks, so it is important to monitor its condition. On 11186 AvtoVAZ installs Gates belts art.
5670XS with automatic tensioner art. T43228. According to the manufacturer, the service life of the consumable is equal to the engine service life - 200,000 km. In reality, the belt runs about 50,000 km. Experts recommend checking the part during each maintenance, after 15,000 km.
In addition to the quality of the belt, how it is tensioned is also important. In engine model 11186, when there is play or jamming of the pump or tension roller, the belt cuts off the teeth and the pistons bend the valve
It cuts teeth instantly, so it is rarely possible to avoid breakage.
Quality of spare parts
Gates has been cooperating with AvtoVAZ since 2003. The company's products are not cheap. A set of timing belt and tension pulley will cost at least 3,000 rubles. Is it worth saving and buying a cheap Chinese equivalent if there is a danger that if the drive breaks, the engine bends the valve?
However, even if you want to buy an original product, you can run into a fake. Under the name Gates there are counterfeits made from cheap material at a dubious price. You need to buy spare parts from official distributors. Addresses can be found on the company website.
The original timing belt is made of hydrogenated heat-resistant rubber with high resistance to various chemicals. The part has a rounded toothed profile. There are 113 teeth, 17 mm wide. Length - 1.076 m.
Belt wear is determined by the quality of the material, the presence of cracks and delaminations. The surface of the part should be elastic, not too hard. It is not permissible to stretch or shift the belt relative to the required position, otherwise it will fly off and a situation will occur in which the valve bends.
Incorrect belt installation
On a Grant with engine 11186, the valves bend in case of any damage to the timing drive. Since the slightest loosening of the belt causes teeth to be cut off, the drive must be installed strictly according to the diagram, using a special key.
If you look at the drive tension, then on the right side from the camshaft to the crankshaft you get a long arm in a free state. The force is from 15 to 20 Nm. Next, the belt covers the crankshaft sprocket. It rises to the water pump, going around the gear on the left. It goes to the tension roller on the right and returns to the camshaft.
How much does engine 126 cost?
Let's see how much engine 21126 costs on a Lada Priora if yours is in a faulty condition. The price of a used engine starts from 70 thousand rubles.
Major repairs can cost 40 thousand rubles. Repairing 16 valves will cost 20 thousand rubles. While preventive inspection and repairs will cost 10,000 rubles. Therefore, it is better not to neglect preventive measures and bring the motor to a service center once a year for performance testing.
In our service center you can buy a new or used VAZ 21126 engine with a guarantee.
Do the valves on the Lada Granta 8 valve bend: 11186 (82 hp) and 21116 (87 hp), + video?
Options for 8-valve engines are well known to Lada Granta owners from previous AvtoVAZ models. These engines have indexes 11183 and (11186, 21116), their power is 82 and 87 horsepower, respectively.
Main article: What engines are installed on Lada Granta cars.
Domestic consumers are very afraid of a broken timing belt. Therefore, this issue plays an important role when choosing a car modification.
In the event of such a situation, bending of the valves may occur, which has given rise to the popular saying “fist of friendship.” There is even slang that refers to motors that bend valves as “plug-in”, and motors that do not have this disadvantage as “plug-in”.
To prevent the belt from breaking, it is necessary to change the belt on time (read more about when it is necessary to change the timing belt according to the recommendation of the factory and the experience of Grantovodov here).
Modification 11183 (Standard package, 82 hp)
Engine 11183 (under the hood of Lada Kalina)
The very first modifications of the Grant car came with a non-lightweight connecting rod and piston group; on such engines the valves do not bend, it all depends on the speed at the moment the belt breaks. These engines were installed on cars in the “Standard” configuration and had the designation 11183. The advantage of this engine is its high-torque power; at the bottom it drives like a diesel engine!
In fact, this is a complete copy of the VAZ-2108 engine, only with an increased volume, and the owners of the nines boasted about stories about how the timing belt broke and nothing happened to the engine.
Engine 11186 (87 hp) - the valves bend!
Engine 11186 (under the hood)
11186 engine specially for CarFrance.ru from Grantovod Igor
When the timing belt breaks on engine 11186 of a Lada Granta, the valves bend; there have already been many cases that have confirmed this hypothesis. The most successful scenario for the development of events in the event of a timing belt break on this engine is the bending of the intake valves.
Engine 11186 (removed from the car)
Engine 21116 (87 hp) - the valves bend!
21116 engine bends valve
This engine is installed on the Lada Granta in the “Norma” configuration. And it also bends the valves, unfortunately.
Main article: Engine 21116: reviews, service life before major overhaul - a detailed review of the engine from Grantovodov!
Engine 21116 (87 hp) is one of the most common in Lada Granta cars.
In order to increase power, AvtoVAZ designers had to install a lightweight piston group in the 114 engine. This has led to the fact that the space for the recesses in the pistons is now completely absent, which means that the piston will 100% bend. Since the piston has become thinner, with a high degree of probability the piston, after “meeting the valves,” will also become unusable and fall apart.
The only difference between 21116 and 11186 is that the first is installed with an imported connecting rod and piston group, and the second with a domestic one.
Repair (cost, warranty)
Repair in the simplest situation will start at 15 thousand rubles, depending on the region and the qualifications of the technician. The saddest thing is that these situations also arise at short mileage, about 15,000 km. But in this case, you can still contact your official dealer for warranty. This type of work is guaranteed.
Since when the timing belt breaks, the valves also break on 16 valves, a heated discussion has developed on our website about which engine is better: 8 or 16 valves.
How to check the condition of the timing belt?
To visually check the timing belt, you must remove the timing cover. This is not difficult to do; with 8 valves there is a lot of space under the hood. Remove the cover and begin a visual inspection of the belt. It should be like new, without cracks or rips, without dirt or deposits, and dry.
If the condition of the belt causes concern, then it must be replaced, for more details, see the article: replacing the timing belt on an 8-valve Granta.
How to check the condition of the pump and tension pulley?
To check the condition of the pump, it is necessary to remove the lower half of the timing cover. Next, release the belt tension by loosening the tension roller. Check the functionality of the pump, spin it and see if there is any play. If there is play, then do not delay and change the pump, as it may jam in the near future.
The tension roller is checked for play in the same way.
You should also be alerted to extraneous noises when the engine is running. A sign of imminent failure of the pump and rollers is the sound of “rustling” of these elements.
There have been cases of timing belt breakage and valve bending as a result of a jammed pump and on a mileage of no more than 20,000 km.
carfrance.ru
Design features of the VAZ 21126 cylinder head
The BC 21126-1003011 head has 16 valves, two camshafts, but differs from its prototype 2112. The design of the new head provides more space for mounting a new timing belt tensioning mechanism. Also, the platform intended for the exhaust manifold flanges has become larger. The spark plug cups are not removable, as on the 2112, but have a one-piece design with a cylinder head. Other cylinder head parts remained from 2112, such as:
- valve;
- hydraulic pushers;
- camshafts;
- springs.
An undoubted advantage of the cylinder head is the hydraulic pushers; their installation eliminates the need to adjust the thermal clearances of the valves. They automatically compensate for the necessary clearances in the valve mechanism.
Technical data VAZ 21126
A four-stroke gasoline engine with an in-line arrangement of four cylinders. The engine is located transversely in the engine compartment. The engine body is made of particularly durable cast iron. The cylinders are drilled directly into the BC.
- The engine has an injection power system, as well as distributed fuel injection.
- The stroke of the new piston and the length of the cylinder diameter are 75.6 and 82 mm, respectively. The exact cylinder capacity is 1597 cc, cm.,
- The power of the Priora's internal combustion engine at 5.6 thousand rpm is 98 hp. The torque of the internal combustion engine at 4000 rpm is 145 Nm. Compression ratio 21126 - 11:1.
- Compliance with emissions of harmful substances Euro 3, Euro 4.
Are there options that don't bend?
Of course there are, but now they are very rare. Once again, I advise you to read the article about PRIORA, there are models of engines that “didn’t bend” before. However, unfortunately, there are practically no such people now. That’s why many people carry out such tuning of power units.
The point here is also banal and simple - instead of conventional pistons, they install options with “recesses” on top. Then, even if a break occurs, the valves will simply fall into these holes and nothing bad will happen. It will be necessary to install a new belt and synchronize the camshaft and crankshaft.
“Great,” you say. BUT why then aren’t such pistons installed on all models? After all, this is 100% protection.
Again, everything is simple - such pistons eat up part of the engine’s power, and quite a lot. There is still debate about “how much”. Some say about 5 - 7%, but excuse me, this is DEcent! The thing is that such a piston is heavier, and the compression is not as effective. That is why many abandoned this decision. Many - but not all!
Ways to solve the problem
Since the collision of pistons with valves has quite serious negative consequences, many car enthusiasts are interested in whether it is possible to influence this situation.
There are several methods that allow you to convert a valve-bending motor into a “plug-inless” one.
The simplest of them is installing pistons with grooves. By the way, on some VAZ engines this is how the problem with “sticking” is solved.
On the bottom of such pistons there are special recesses for valve plates. Due to this, the latter in the open position do not come into contact with the pistons installed at TDC.
But not all engines can be modernized in this way, for the reason that it is not always possible to find pistons with factory-made grooves to replace the “original” ones.
The second method is to independently make grooves on the piston. This method is suitable for those who have not found replacement “non-stick” pistons. But this method has a significant drawback - it is very difficult to make identical recesses on all pistons. As a result, an imbalance in the weight of the pistons may occur, which will affect the service life of the crankshaft. Also, grooves of different sizes can cause different compression in the cylinders, and this problem cannot be eliminated.
The third method is to increase the height of the combustion chamber. This is done by installing 2-3 gaskets under the head of the block. This method has a negative side - an increase in the volume of the combustion chamber, which entails a drop in compression, and as a result - a decrease in power and an increase in fuel consumption.
Source
Cars on which the valves will NOT bend when the timing belt breaks (list).
If a malfunction occurs in the timing system, you may encounter a phenomenon such as valve deformation. This happens due to the collision of pistons with valves moving at high speed. However, not all engines are susceptible to this problem. In some cases, bent valves, and therefore expensive repairs, can be avoided.
Damage to internal engine components is not always associated with a broken timing belt or chain. Even jumping an element by several teeth can lead to bending of the valves
. This often happens due to untimely vehicle maintenance. Low quality components and installation errors are another common cause of problems with the timing system.
Bent valves can be avoided if the engine pistons have special grooves. This avoids metal-to-metal collisions. The car owner just needs to change the timing belt or chain, after which the engine will work as before. If the valves are bent, there will be a need for serious repairs.
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Let's move on to our list and start with AvtoVAZ engines. The names are not distributed by model, so domestic power units of the same version were found on different cars.
It is worth noting that in 2022, AvtoVAZ returned “stickless” pistons to a number of models. I recommend searching for information on a specific engine version on the Internet.
On cars of the VAG group (Volkswagen, Audi, Skoda, etc.), “plug-in” engines are represented mainly by old models, which are almost never seen on our roads anymore:
The list of engines without the problem of bending valves on Opel looks like this:
For Toyota, the data differs greatly. Some car owners have bent valves, while others do not have this problem on a similar engine. Approximate data looks like this:
Source
Some innovations
Upgraded 16-valve engine
The recently released sedans and hatchbacks of the Priora family are equipped as standard with a modernized engine - a 90-horsepower engine with 8 valves and lightweight connecting rod and piston groups. This power unit was developed at the AvtoVAZ scientific and technical center. To master it, the manufacturer needed to modernize the production lines of main parts and engine assembly. Metallurgical production has undergone modernization of the cylinder block casting line.
To reduce the overall weight by 39% compared to the main version, it was necessary to optimize the cooling system of the cylinder head and block. The engine received a new camshaft drive, including an automatic tensioner, piston cooling nozzles, and a metal cylinder head gasket. Reducing mechanical losses made it possible to increase the motor power from 59.5 kW to 64 kW, that is, up to 90 hp. At the same time, the maximum torque increased from 120 Nm to 140 Nm. This resulted in reduced vibration and noise levels. Specific fuel consumption also decreased, which led to an increase in engine life to 200 thousand km. The environmental friendliness of the engine has also increased. Carbon dioxide emissions have been reduced from 175 g/km to 165 g/km.
AvtoVAZ produced more than 700 cars with new engines. The recommended retail price for the Lada Priora in the “Standard” sedan configuration is 8 thousand. e., and the hatchback - 8,500 thousand. e. The domestic manufacturer plans to soon use new engines on Lada Granta and Lada Kalina.
The engine is the basis of any car - without it there is no movement and Drive! The engine on the Priora comes in 2 modifications: 21126 and 21127, the second is essentially a modified 126 engine, which has been installed on Lada Priora since 2013. after restyling the Lada Priora car model.
126 engines (16 valves) are high-torque after 1000 rpm, and up to 4000 - this is the maximum torque, after 4 thousand the torque decays. The 127 engine, due to the distributed air intake, pulls well from below, damping out at about the same rate as its brother. If the running-in was carried out properly, then the engine life will be close to 200 thousand km. Overhaul of the engine of a Priora car, like the entire AvtoVAZ range, is subject to the garage - there is nothing supernatural about it. The price of spare parts is more expensive than tenths, but cheaper than foreign ones. Engine power of 98 and 106 hp allows you to feel confident on the road - well, certainly not a vegetable. I consider the main 2 disadvantages of the engine to be the unit: pump roller, timing belt. If one of these spare parts fails, the valve bends. 2 minus - camshaft plugs: when these rubber bands dry out at low temperatures, they are squeezed out along with the oil. If you don’t see this in time, there will be trouble! The fact that hydraulic compensators knock when cold is considered the norm - you can close your eyes to this, there will be no harm.
In the vast majority of cases, Lada Priora cars are equipped with a 16-valve engine (the 8-valve engine was “inherited” from the “ten” and was not warmly received by car enthusiasts).
The first 16 valve engine received number 126, the second – 127. The characteristics of the Priora engine No. 126 turned out to be so good and optimal that the car with this engine was sold most often. Repair of the Priora engine with 16 valves is not carried out so often, but you will have to look into it at least once every six months - in order to make sure with your own eyes that everything is in order with it. In addition, you need to keep an eye on the timing belt - if you miss this unit, you can get into big money. Read the article to the end, and we will tell you about these 2 units.
Modifications
The base of the power unit served as the basis for the creation of two popular and fairly well-known modifications. The first was the Sport version Sport 21126-77. One of the most important differences was the increase in power to 120 horsepower and torque to 154 Nm. At the same time, manufacturers managed to raise environmental standards to comply with the Euro 5 standard. The modification was put into production in 2013, and was placed under the hood of Lada Kalina Sport and Lada Granta Sport cars.
NFR 21126-81 is the second, even more powerful modification, which has a power of 136 horsepower and a torque of 148 Nm. To obtain such indicators, manufacturers had to rework the intake manifold and also use camshafts with new cams. In addition, the exhaust system was also redesigned, installing a catalytic collector there. The motor in this version powers the Lada Kalina Sport model.
Belt drive failures
- belt break. Can be caused by wear, as well as excessive tension and wear on the tension and parasitic rollers;
- belt slippage due to cutting of teeth or breakage of the tension roller spring (if it is provided for in the design). Cut teeth may not be immediately detectable;
- cutting off one of the gear keys or breaking the keyway;
- On some engines, the camshaft gears have a conical fit, that is, only the tightening torque of the bolt serves as insurance against gear rotation. (One master failed to get such a gear. To my question: “So what?” was the answer: “twelve out of sixteen.” This meant bent valves, of course.)
