Which spark plugs are better for Priora 16 cl.: review, types and recommendations

Spark plugs are found in any gasoline engine, since they generate the necessary spark that ignites the mixture of air and gasoline, which then enters the cylinders through the valve and sets the car in motion.

Due to the harsh conditions to which they are exposed, high temperatures, pressure, vibration, products quickly wear out, especially contacts, which are key elements of the device. The more powerful and faster the spark generated, the more efficient the start, minimizing wear on other components of the electrical network and battery.

In our review, we will provide recommendations: what to look for so as not to make a mistake when choosing a product, which brand model is best to buy. We will get acquainted with popular manufacturers, descriptions of ignition systems for Lada Granta, Priora and Kalina, and guide you on the average price.

How to choose the right spark plug

It is important to purchase high-quality spare parts for a car; in order to buy a good product, you need to pay attention to the following selection criteria:

1. It is necessary to order a product compatible with the machine's engine. Most of the best brands clearly indicate the vehicle models their product will be compatible with. Therefore, you need to carefully review the manufacturer's compliance list.

2. Apart from compatibility, you need to choose the design type as there are various options available. The most common:

• Copper-Nickel: The name may confuse you because these products are primarily made of nickel, with only the inner core being made of copper. It conducts current well, which is why most electrodes are made from it. The product is inexpensive, its disadvantage is that it has a short service life, even if used in a high-energy ignition system without a distributor. Many vehicles will benefit from this option; it is suitable for natural gas engines.
• The next type has a platinum center contact. It is expensive due to the rarity of this element, which is harder than nickel, so you can be sure that the product will not corrode. The platinum will prevent the tip gap from widening and wearing out, which directly affects the efficiency of the engine. There are models with one or more electrodes. This helps generate the spark in the best possible way. In terms of service life, it is twice that of standard nickel/copper construction.
• Iridium Product: If you want flawless, smooth motor performance, there is nothing better than an Iridium product. It has a longer service life than traditional models. The thin wire central contacts are designed to conduct current most efficiently. These are expensive products, but the price is offset by incredible performance.
• Silver candles are an option with the best thermal conductivity. The problem with this product is its durability. The precious metal cannot match the durability of platinum or iridium models.

3

It is important to decide: “What kind of ignition is needed, cold or hot?” To give a very simple but precise definition, we can say that candles that glow during operation are hot

And those that do not reach high temperatures are cold.

The metal shell of the structure operates at the same heat as the head. The elements are screwed to each other, forming a chamber in which heat is distributed evenly. Hot models have a long insulator tip with a large surface area, causing all parts to become hot. At the same time, cold ones have a small cap that helps quickly remove excess degrees from the combustion zone.

Russian-made models usually have a numerical heat rating. Their assessment is not always consistent because some brands give higher values ​​while others underestimate.

It becomes extremely difficult for buyers to choose the right product with so many options. It is best to order the design in accordance with the car's engine and year of manufacture.

4. If you do not want to suffer for a long time during replacement, it is better to choose a design that is easy to install. By applying the above selection criteria, a productive model can be easily determined.

Below is a table of compatibility of spark plugs for a Lada car:

Choice

The choice of candles today is quite extensive. But we’ll talk about which ones are used for the VAZ 2110 and what can currently be considered the best choice for your car.

Candles differ from each other mainly in the material from which the electrodes are made.

The service life may increase or decrease depending on the care, conditions of use of the vehicle, and the quality of the fuel being poured.

Platinum candle

How to replace spark plugs on a VAZ 2170-VAZ 2172?

Note! As we said earlier, in order to change a spark plug you will need a special spark plug wrench that is suitable for 16 valve cars, and a special one is needed only because it is equipped with a magnetic insert that will hold the spark plug when you unscrew it and remove it from the hole, respectively, without a magnetic one inserting a candle will be more difficult for you to get!

Removal: 1) At the very beginning of the operation, remove the screen from the engine so that it does not interfere with further work, since it covers most of the engine, and about how to remove it, read the article called: “Replacing a car engine screen.”

2) Then from each ignition module (There are four modules in total, each goes separately to each spark plug, the modules were also shown with arrows in the second photo from above) disconnect the wire blocks (For clarity, the photo below shows only one ignition module, and its block indicated by a red arrow) that are connected to them, these pads are held on clamps by bending them, the pad can be disconnected from the module, and after this operation, pick up the key and use it to unscrew all the nuts that secure the module to the car engine (One nut securing one module is indicated by a blue arrow).

Note! When the fastening nut is unscrewed, remove the module indicated by the blue arrow from the hole in which it is located and then put it aside and make sure that no water gets on it, otherwise it may quickly fail when connected!

3) Now that all the modules have been unscrewed and removed, pick up a special spark plug wrench and use it to unscrew all four spark plugs (the spark plugs are located deep in the holes from which you removed the modules).

Note! When you are about to remove the spark plug, and if suddenly you do not manage to do this, then pick up any ignition module and put it in its place (the module must go all the way into the spark plug itself and lock onto it), so that’s when the module will be fixed on the spark plug, pull it and thereby you will remove the spark plug from the car!

Something else you need to know, many of you have already heard, or maybe not, that any malfunction with the engine can be determined by the spark plug, so I suggest you read the article entitled: “Diagnostics of spark plugs”, everything is in detail in it scheduled!

4) Well, to finish the removal, let’s add a few words about the spark plug, namely, when you remove the spark plug and determine by its appearance that everything is in order with it and it does not need to be replaced, then clean the spark plug itself from dirt, using a special sandblaster for this a device with fine-grained abrasive material, I will note the fact that you are unlikely to have this device in your garage or at home, so travel to car services and find where such a device is used, or simply wrap the spark plug back without cleaning it with anything.

Note! By the way, you cannot clean the spark plug with sandpaper or a metal brush, because all the dust from it will fly onto the spark plug electrodes and if the dust gets on the central electrode, it can easily cause a spark to leak, thereby sometimes tuning up your engine!

Installation: 1. When installing a spark plug, remember the fact that it is installed in the reverse order of removal, but if you are installing the same spark plug again, then using a special probe, check what gap you have between the electrodes, it should be no less and not more than 1.00-1.15. (see photo 1)

Note! If suddenly the gap is different, then in this case take the same special feeler gauge and use it to adjust this gap, the gap is adjusted only by bending or straightening the side electrode of the spark plug, but take into account only the side electrode, the central electrode (It is indicated by a red arrow in photo 2, but it in the photo above it’s hard to see, so you understand, it goes into the spark plug itself, and the side electrode comes from the spark plug and it’s not located in it) you don’t need to touch it, because if you even accidentally get on it, it can lead to because the spark plug will fail, so be careful!

2. And one more thing you should know, namely that the spark plug must first be screwed in by hand and only then it must be tightened using a wrench; the tightening torque for the spark plugs is 30.7-39.0 (3.1-4.0 kg).

It will be useful: This is sva with 542 hp. f-pace from jaguar

Additional video clip: If you are interested in more detail about how to change spark plugs in cars, then check out the instructive video clip that is located just below and which gives a visual representation of how a spark plug on a car is replaced.

Classification

You need to approach your choice as responsibly as possible. It is worth deciding which type of spark plug is best suited for the car. So, these elements have their own classification according to:

• Number of electrodes: two- and multi-electrode. The first type consists of several elements. These are the side and central electrodes. These are installed standard on Priora. As for the second type, they have one central and three side electrodes. 14fr7du. What spark plugs are currently best for VAZ 16 cl.? As reviews note, these candles have a longer service life and are more reliable.
• Type of material. Often spark plugs are equipped with copper electrodes. What are the best spark plugs for Priora? Judging by the reviews, they have a short resource - up to 30 thousand kilometers. But recently more “tenacious” iridium analogues have appeared on the market. Their resource is about 60 thousand. By the way, such candles have a slightly smaller diameter of the central electrode. If on copper it is 2.5 millimeters, then on iridium it is 0.7 millimeters.
• Thread diameter. When purchasing, check with the seller for which engine you need spark plugs. Thus, 16-valve valves are equipped with elements with a smaller head size and thread diameter. Spark plugs from an 8-valve engine simply won’t work in a 16v Priora.
• Heat number. This parameter means the pressure at which it is easier to heat the candle. Candles for Priora 16 cl: which ones are better to install. There is a cold and a hot type. The glow number of these candles is 20 and higher for the first and 11-14 for the second. Which spark plugs are better for Priora 16 cl.? There is no clear answer to this question. According to Auto-VAZ recommendations, spark plugs for 16 valve Priora are which spark plugs are best for 16. But there are also universal options. In this case, the glow number is from 11 to 20. These are the spark plugs that many motorists use. They behave well both in summer and in cold weather.

Description of types and markings

When the need for replacement arises, you should decide which candles are best to install. The most popular brands are Brisk, NGK and Bosh. However, they have different markings adopted in Europe, so you need to know which imported candles correspond to the domestic markings. The interpretation of this marking, according to OST 37.003 081 - 98, is as follows:

1. The first letter A means the type, diameter and thread pitch - M 14 x 1.25.
2. If the letter U follows, it indicates the size of the hexagon for tightening the spark plug, 16 mm. In the absence of the second letter, the product has a size of 20.8 mm.
3. The number 17 shows the heat number. When the engine is running, the spark plug heats up to a certain optimal temperature, at which it self-cleanses. In the event of unfavorable operating conditions, overheating of the electrodes occurs, and the fuel in the cylinder can ignite spontaneously, without waiting for a spark to occur. This effect is called glow ignition, and the glow number of a candle is a parameter indicating the temperature regime of its proper operation. The higher this parameter, the less the product heats up (cold candle) and can work in much more difficult conditions than a candle with a low heat rating (hot). In engines with high power and high speeds, colder spark plugs are used, and for power units with lower loads, hot products are used.

Marking of imported spark plugs on Lada Priora

1. The letter D indicates the length of the thread (skirt) - 19 mm.
2. The letter B means that part of the insulator protrudes above the plane of the product body.
3. The letter P indicates that a resistor is built into the spark plug body to suppress interference from sparking.
4. The last letter M indicates that the central electrode is bimetallic with a copper core.

The question of how to choose imported spark plugs by size for a Priora is not difficult to solve. To do this, just unscrew the old spark plug and have it with you during purchase. How imported products are labeled is shown in Table 1.

As can be seen from the table, the markings of domestic and imported candles are different. In addition, there are other markings. To simplify the selection process, Table 2 shows the corresponding spark plugs from various manufacturers for installation on Priora.

Note: in Table 2, the markings in the numerator are for the 16-valve Priora engine, and in the denominator for the 8-valve engine.

It is better to purchase spark plugs from official dealers, whose representatives will be able to explain all the nuances on the spot and advise on the appropriate option, since there are high-tech products at a higher price. For example, platinum or iridium spark plugs, the central electrode of which is made of these metals.

Its diameter is only 0.4-0.7 mm, despite the fact that a standard copper electrode has a size of 2.5 mm. Such products last twice as long as regular ones, so their high cost is fully justified. Spark plugs with two, three and four side electrodes are also suitable for installation on Priora. It is believed that they create better conditions for fuel combustion and extend the life of the vehicle's power plant.

Iridium Power

Features and Benefits

HIGHER EFFICIENCY

Higher power with optimal combustion cycle

Iridium Power

> Significant improvement in combustion: Iridium Power has a low voltage requirement and high flammability, resulting in fewer misfires and lack of spark, resulting in significantly improved combustion

> Higher engine output: significantly improved combustion allows for increased engine performance

> Measurable results: Factory testing of motorcycle engines with Iridium Power shows a 0.5 hp (1.4%) increase in power at 110 km/h compared to conventional spark plugs

Factory motorcycle tests show improved combustion with lridium Power

Motorcycle: 250cc cm (2-stroke water-cooled, V2 cylinders)

Conditions: full throttle 90-110 km/h

Data: company comparison

HIGHER POWER

More power under different driving conditions

Iridium Power

> Unique power: the power produced by the 0.4 mm electrode is only achieved with these spark plugs

> Outperforms all other plug types: using an iridium center electrode with a thin center diameter of 0.4 mm, we obtain higher power than with plugs with diameters of 0.8 mm and 2.5 mm

Factory motorcycle testing shows increased power when using Iridium Power

Motorcycle: 250cc cm (2-stroke water-cooled, V2 cylinders)

Conditions: full throttle 100 km/h

HIGHER ACCELERATION

Improved dynamics and acceleration

Iridium Power

> High flammability: The world's only 0.4mm iridium center electrode and specially shaped side electrodes provide high flammability and low voltage requirements

> Improved ignition: Iridium electrodes provide better ignition at the required high voltage and provide reduced misfire in conditions where ignition is difficult

>Higher acceleration: acceleration is much higher than using conventional spark plugs

Factory motorcycle tests show better acceleration with Iridium Power

Motorcycle: 250cc cm (2-stroke water-cooled, V2 cylinders)

Conditions: 6th gear locked, full throttle 50 km/h using automatic guidance device

Data: company comparison

MORE RATIONAL FUEL CONSUMPTION

Better combustion, less fuel consumption, less noise

Iridium Power

> Higher engine efficiency: excellent ignition with the unique thin 0.4mm Iridium Power electrode ensures much more efficient engine operation

> More efficient fuel consumption: compared to conventional spark plugs (W20FS-U), Iridium Power (IWF22) in a 50cc 2-stroke engine. see, according to test results, fuel consumption is reduced by approximately 5%

Factory motorcycle testing has shown reduced fuel consumption when using Iridium Power iridium spark plugs

Motorcycle: Honda DIO (2-stroke, single cylinder, air-cooled, 50 cc)

Conditions: speed 30 km/h, total weight 120 kg, measurement time 10 minutes, air cooling speed 30 km/h

Data: company comparison

Replacement Guide

How to change the spark plugs yourself on a Lada Priora 16 valves and what is needed for this? We describe the replacement procedure below. To replace the SZ with Denso or any others, no specific tools are required. Prepare a spark plug wrench; if you don’t have one, a regular 16mm spark plug socket will do.

Please note that the spark plug wrench or socket must be equipped with a special rubber band or a magnet inside

This is important, since the magnet will be able to hold the dismantled SZ suspended

So let's get started:

Open the engine compartment and remove the plastic motor casing. When removing, be careful not to damage the fasteners. Disconnect the terminal from the ignition coil and unscrew the screw that secures it. Using a flat-tip screwdriver, pry up the spool and remove it. This is done for convenience. When removing the coil, be careful - damage to the device is not allowed, as additional financial costs will arise. The candle is located inside the spark plug well. It is impossible to get it without an extension cord, so use it for dismantling, but before removing it, you must disconnect all high-voltage wires. When removing, pay attention to the condition of the well - if there are malfunctions in the cylinder head, then there may be some motor fluid in the spark plug well. If there is oil, you need to replace the cylinder head gasket. It is impossible to carry out this procedure correctly at home, so it is better to contact a specialist. At this stage, if there is no oil in the well, it is recommended to blow it out with compressed air using a compressor - this will remove all dirt from it. If you are replacing the spark plug on a new car for the first time, you will need to apply force to dismantle the elements - a regular spark plug wrench may not be suitable here. Therefore, it is better to use a socket head with a wrench; if there is no wrench, then a powerful screwdriver will do. Be careful when unscrewing the spark plug. The key must be equipped with a magnet or an elastic band so that the SZ can be held suspended. This is important, otherwise you can break the insulator of the SZ, and if this happens, it will not be easy to remove the fragments. This will be especially problematic if by chance they get inside the cylinder. Carefully remove the spark plug from the block. If you can’t simply remove the spark plug, you can use the ignition coil that was removed earlier. The coil can be placed on the shank of the element - this will make it easier to get it out. The spent SZ was dismantled. You can diagnose it by the carbon deposits that have formed on it. The presence of a red or orange coating indicates the presence of ferrocene additives in the fuel - if this is the case, then the gas station needs to be changed. If the driver uses fuel additives, this may cause deposits. If the carbon deposits are black, this indicates that the air-fuel mixture is too rich, as well as increased gasoline consumption; white, on the contrary, indicates a lean mixture. Read more about the colors of soot and options for removing plaque in the article. As for the reasons for a lean or enriched air mixture, they can be different. But if you saw that the tip of the insulator is basically clean, and there is no carbon deposits, you don’t have to worry - everything is in order with the car engine. You can begin installing the new SZ. Place the spark plug in the cleaned spark plug well. At first, you need to tighten the element without a knob or much effort. This is important so that the candle fits tightly into the thread, and if you use a wrench when the NW does not fit into the thread, you will ruin not only the candle, but also the well

Therefore, this step must be performed carefully. After the SZ is twisted by hand and goes in all the way, you need to use a wrench to tighten it

But even in this case, you cannot overdo it, there is a risk of breaking the thread. Once the spark plug is installed, you can replace the coil. Tighten the fixing screw until it stops and install the connector in place. The installation of the remaining SZ is carried out in a similar manner.

In order to avoid problems associated with the operation of spark plugs, especially in winter, it is necessary to install only high-quality spark plugs on your car. Our market today is teeming with low-quality fakes, so it can be difficult for a motorist to avoid falling for a low-quality product when making a purchase.

This is especially true for car enthusiasts who choose SZ from well-known manufacturers. Such products are most often counterfeited. Be careful and buy auto parts and consumables from trusted suppliers.

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Installing new ones

To replace spark plugs, you must have at your disposal a special spark plug wrench with a rubber bushing and a cardan, which makes it possible to remove parts from wells of any depth. If you have a tool, all work is performed in a few simple steps:

• remove the terminals from the ignition coil and carefully remove this part;
• We insert a spark plug wrench into the well and first loosen the part, and then unscrew it from the thread. If nothing works on the first try, you can try to repeat the procedure on a hot engine;
• we check the gap between the electrodes and, using the same spark plug wrench, install a new product, tightening it until it stops;
• mount the ignition coil and connect the terminals to it.

To replace spark plugs on a Priora, you will also need to carefully dismantle and then reinstall the decorative panel covering the engine. After completing the work, it is recommended to start the power unit and make sure that it operates stably, without any extraneous sounds or failures. Only after this can you close the hood and go on a trip with new spark plugs.

If the gap is OK, put the spark plug on the tip of the ignition module and lower it into the shaft. Next, use a wrench to tighten it until it stops. There is no need to pull hard. The recommended tightening torque is 25 to 30 Nm. At the next stage, screw the coils and insert the terminals.

Replacing spark plugs on a Priora

Welcome! A spark plug is a very important, although small in size, thing that is needed to ignite the fuel-air mixture in a car engine cylinder; in simpler words, thanks to them, the car drives and if you unscrew them, you will no longer start it, because the mixture they ignite will not ignite and therefore the engine will not start.

Note! In order to replace spark plugs on a Priora (And they are located in completely different places, unlike 8 valve engines), you will need to stock up on: A set of wrenches, as well as the spark plug wrench itself, which comes specifically for the car and you will need all this the probe with which you will check the spark plugs for the gap that they have set, if the gap at the electrodes of the spark plug is too small (a defective spark plug, but it can be made normal using this very probe) then you will need to adjust it and thereby return it to the correct one clearance at which the engine will operate normally, confidently and not stall!

Where are the spark plugs located? The spark plug in 16 valve engines, in contrast to 8 valve engines, is in a radically different place; they still continue to be screwed into the cylinder head, but only in 16 valve vehicles they are screwed in from above, while on 8 valve engines they are clearly visible from the side, for clarity, a little Below you can look at the photo, in which the arrows indicate the four ignition modules under which the spark plugs are located.

Note! But you won’t see a picture like the one above on your car, since the engine of a 16-valve car is always closed from above with a so-called screen (Indicated by a red arrow), you will have to remove this screen and only after that you will be able to get to the ignition modules, and only after that modules, right down to the candles themselves! (You will learn how to remove this screen a little later as you read this article)

When should you change spark plugs? The spark plugs must be replaced if the car’s engine starts to stall, that is, when tripping, the engine will twitch, it will also have difficulty picking up speed and in general it will be noticeably worse to drive, in addition, if the spark plug is faulty, the engine will start even worse.

These are all signs, but what about the recommendations given by the manufacturer, you ask? Let's look at this in more detail! According to the factory's recommendations, if the spark plugs are the most common and their electrodes consist of copper or yttrium, then they need to be changed at intervals of 30,000 thousand km.

, because they burn out quickly, but if you use spark plugs whose electrodes are coated with platinum or iridium, then you will have to change such spark plugs much less every 60,000 thousand km.

, and all because platinum is more resistant to high temperatures and, in addition, it is resistant to corrosion of the spark plug electrodes, where it is used!

How to replace spark plugs on a VAZ 2170-VAZ 2172?

Note! As we said earlier, in order to change a spark plug you will need a special spark plug wrench that is suitable for 16 valve cars, and a special one is needed only because it is equipped with a magnetic insert that will hold the spark plug when you unscrew it and remove it from the hole, respectively, without a magnetic one inserting a candle will be more difficult for you to get!

Removal: 1) At the very beginning of the operation, remove the screen from the engine so that it does not interfere with further work, since it covers most of the engine, and about how to remove it, read the article called: “Replacing a car engine screen.”

2) Then from each ignition module (There are four modules in total, each goes separately to each spark plug, the modules were also shown with arrows in the second photo from above) disconnect the wire blocks (For clarity, the photo below shows only one ignition module, and its block indicated by a red arrow) that are connected to them, these pads are held on clamps by bending them, the pad can be disconnected from the module, and after this operation, pick up the key and use it to unscrew all the nuts that secure the module to the car engine (One nut securing one module is indicated by a blue arrow).

Note! When the fastening nut is unscrewed, remove the module indicated by the blue arrow from the hole in which it is located and then put it aside and make sure that no water gets on it, otherwise it may quickly fail when connected!

If carbon deposits appear

After 15 thousand kilometers, it is recommended to re-inspect the condition of the spark plugs. Sometimes brownish-yellow carbon deposits can be observed on the surface of the electrodes. This indicates the use of fuel with an octane rating that is not suitable for the vehicle. When the spark plug overheats, the carbon deposits will turn white. Erosion is also possible. The reason may be early ignition timing. Sometimes the candle is simply not screwed on tightly. Also, with early ignition, the electrode itself melts. This spark plug is for replacement only. Which spark plugs are better for Priora 16 cl., see above.

If the car is moving, you should check the part with a tester for functionality. Typically, a gun with a metal tip and cap is used for this. The tip is touched to the thread of the spark plug, and the cap is placed on the terminal for the armor wires. When you pull the trigger, a spark should occur between the electrodes. If it is not there, the element needs to be replaced.

When do you need to change spark plugs?

The replacement interval of 30 thousand km is very arbitrary. The AvtoVAZ company equips Priora engines with domestically produced single-electrode spark plugs marked A17DVRM for a 16-valve unit and AU17DVRM for an 8-valve unit. Practice shows that even on a new car, these spark plugs often fail long before the end of the service interval, causing unstable engine operation and increased fuel consumption. For this reason, many car enthusiasts prefer imported products.

Fault diagnosis

The best way to determine performance is to test the spark plug under pressure. The essence of this diagnostic method is to check sparking on the electrodes under conditions close to operating conditions. To do this, a candle is screwed into a special chamber equipped with an inspection window, and a discharge is passed through it, while air is pumped into the chamber with a compressor or manually.

At a certain moment, the discharge on the electrodes will begin to fade, and then completely disappear. Record the pressure gauge readings at this moment and compare them with the pressure in the cylinder, which was previously measured with a compression gauge. Plus 2 atm should be added to the compression meter readings. since the starter speed is much less than the engine operating speed. If the pressure in the cylinder is higher than the spark attenuation pressure at the electrode, the spark plug should be changed, because in operating mode it does not ensure complete combustion of fuel, and its excess begins to enter the engine oil sump.

The consequences of driving a Lada Priora for a long time with faulty spark plugs can be disastrous, because, in addition to loss of power, some of the unburned fuel dilutes the engine oil, which harms engine parts. Then, in the form of vapors through the crankcase ventilation system, it again enters the cylinders, supersaturates the combustible mixture, which again does not completely burn on faulty spark plugs and ends up in the oil.

Therefore, if unstable operation, jerking, or failure occurs, you should immediately unscrew and inspect the spark plugs. Thick black deposits on the electrodes plus black exhaust from the pipe when the engine is running indicate an over-enrichment of the combustible mixture or an unsatisfactory condition of the spark plug itself.

If the coating on the electrodes is white and fluffy, and bluish smoke comes out of the exhaust pipe, then this is a problem with engine oil getting into the cylinders, so the oil caps or piston rings should be changed. All these additional loads on the spark plugs have a negative impact on them, and in any case they need to be checked for functionality and, if necessary, replaced ahead of schedule.

Expert recommendations

What experts advise:

1. Always follow the spark plug replacement schedule. Conventional spark plugs last 20-30 thousand, and iridium ones - up to 100 thousand. If the spark plugs have already exhausted their service life, this will lead to unstable operation of the engine in general and the impossibility of starting it in particular.
2. Periodically check the condition of the safety devices, especially if the first signs of their inoperability appear. At the initial stage, problems are always easier to solve. If during a visual inspection you see that carbon deposits have formed on the electrode of the spark plug, then you need to clean the spark plug using special means or traditional methods. To clean the candles, you can heat them on the burner of a household stove, and then clean them with sandpaper. You can also use vinegar or Coca-Cola.
3. If there are cracks or signs of damage on the SZ, then take into account the need to replace the devices in the near future.
4. Don't buy cheap candles. The saying “the miser pays twice” is very relevant here.
5. Sometimes the reasons for the failure of the SZ are associated with incorrect operation of the ignition coils or high-voltage wires. Over time, the wires wear out and cracks may appear on them, which lead to current leakage. Accordingly, this may affect the performance of the internal combustion engine.

Price issue

The cost of candles varies depending on the manufacturer, as well as the store where they are purchased. The price for one spark plug AU17 DVRM for Lada Priora is about 60-80 rubles per piece. The cost of one NGK BCPR6ES candle is approximately 150 rubles per piece. SZ Denso Q20PR-U11 will cost the buyer approximately 110 rubles per unit.

Basic faults

The time has come to explain why it is worth carrying a certain supply of candles with you for the Priora. Don’t even store them in the garage or at home, but put them under the trunk lid so you don’t have to worry about anything when a critical situation occurs. When the “spark” doesn’t go after a hard day at work, you definitely won’t be eager to walk to the nearest auto parts store.

You can determine the malfunction of the Priora spark plugs by the following signs:

• Starting the engine is difficult (that is, the starter rotates, the fuel-air mixture is supplied inside the chamber, but there is still no spark; the engine will start if you turn the starter for a long time).
• Fuel consumption has increased (there may be several reasons for this phenomenon, but if at least one more reason from the list appears, it is worth inspecting the ignition unit).
• The proportion of carbon monoxide coming out of the exhaust system has increased.
• The engine power has decreased (this is especially noticeable during acceleration - there is no usual “traction” and good acceleration).
• The engine is misfiring, which means one of the cylinders is not working - simply because “its” spark plug did not give a spark, the mixture did not ignite.
• Usually the spark plug is changed every 15,000 km (for many this is one year of driving with their favorite car), but they can be “flooded”. This is a more serious problem that will take a little longer to deal with.

Let's get started

So, first, open the hood and remove the decorative engine cover.

Note! When removing the high-voltage cord, do not hold the cord - it may be damaged. You only need to grab the rubber tip. If the element is damaged, misfire may occur. The engine will start to stall, and the car itself will begin to consume a lot of fuel (since it needs more energy to push the idle piston in the cylinder).

Now let's move on to the candles themselves. We lower a specialized key into the shaft and begin to unscrew the spark plug counterclockwise using the handle.

Helpful advice: if you don’t have a key with a magnet, you can use the ignition module itself - install it on the end of the spark plug and pull it back out. This way we can remove the old element carefully and without damage.

What spark plugs does AvtoVAZ recommend for the Lada Priora?

The manufacturer recommends installing spark plugs Brisk “SUPER” DR15YC-1, Brisk DR17YC-1, Bosch FR7DCU, as well as AU17DVRM or AU15DVRM. These spark plugs are the most popular and are recommended by the factory. Their resource is designed for 30 thousand km, after which it is better to replace the spark plugs.

Spark plugs recommended by AvtoVAZ for 8 cl engines

• JSC ZAZS, Russia A17DVRM
• BERU, Germany 14R-7DU
• CHAMPION, England RN9YC
• NGK, Japan BPR6ES
• DENSO Denso, Japan W20EPR
• BRISK, Czech Republic LR15YC
• BOSCH Bosch, Germany WR7DC

Recommended spark plugs for 16 cl engines

• JSC ZAZS, Russia AU17DVRM
• BERU, Germany 14FR-7DU
• CHAMPION, England RC9YC
• NGK, Japan BCPR6ES
• DENSO, Japan Q20PR-U11
• BRISK, Czech Republic DR15YC
• BOSCH, Germany FR7DCU

The advantage of iridium or platinum spark plugs is their service life, which is longer than conventional spark plugs. If conventional spark plugs require replacement after 30 thousand km, iridium spark plugs can last up to 60-70 thousand km.

After purchasing spark plugs, we recommend checking them. You can do this yourself, if you or someone you know has the device, or in a car service center at a special stand.

Why iridium?

Such a wide selection of candles pampers car enthusiasts only for 20-25 years. Before this, the choice was much poorer.

Platinum candles were already on sale, but one could only dream of decent quality or reliability.

The best manufacturers in the world did everything possible to improve the quality of the product and achieve their goals, namely ensuring maximum reliability, long service life and reducing energy consumption.

In 1994, NGK specialists finally managed to create high-quality spark plugs using a special material - iridium.

What are its advantages? — It has a maximum melting point (in this indicator, iridium surpasses even platinum), excellent anti-corrosion properties and high quality.

The developers managed to make the thickness of the electrode minimal. Moreover, it was the tip that was made of rare metal.

In terms of its hardness, iridium occupies one of the leading positions. Many believe that the metal is based on the material of a meteorite that arrived on our planet many millions of years ago. Hence its hardness indicators.

Another advantage of iridium is its ability to withstand high temperatures. Metal can only be melted when heated to 2,500 degrees Celsius.

Iridium has been actively used in the industrial sector (since the 20s of the last century). But in practice it is not used in its pure form, but in the form of a special alloy.

This is not surprising, because without the addition of metals, iridium is extremely fragile and useless in production. That is why in practice only alloys are used.