How to choose the right spark plugs
An error in choosing spark plugs can “kill” the engine. Spark plugs can affect fuel consumption. There are “incompatible” spark plugs and high-voltage wires. In this article, we'll look at what you really need to know and consider if you service your car yourself. After all, this small device, which looks so simple, is in fact a complex and high-tech product with strictly adjusted dimensions, made from materials specially designed for candles.
Spark plug device
Device
The candle is assembled in a metal case, which has a threaded part (thread diameter from 8 to 18 mm) and a hexagon (from 13 to 25.4 mm). A ceramic insulator is installed in the housing, with an electrode running through the center. The lower part of the insulator forms a thermal cone, which is placed on a heat sink for better heat removal. Depending on the design, a resistor or glass sealant is placed between the central electrode and the contact rod. The assembled insulator is rolled into the housing. In the lower part, one or more side electrodes are welded to the end of the housing.
“Hot” and “cold” or what is the heat rating
The part of the spark plug that is inside the combustion chamber must have a strictly defined temperature when the engine is running at full power - from 500 to 600 degrees Celsius. Engines with different degrees of boost have different thermal load, based on which the size of the thermal cone and the contact area between it and the housing are selected.
If the temperature is lower, the candle will not “self-clean” and will become covered with soot. After some time, the electrodes will close and the spark plug will stop working. This happens when the installed spark plugs are too “cold” - they have too high a heat rating: for example, if instead of A17 you install A23, the engine “doesn’t like” such spark plugs, it will begin to have difficulty starting, often “triple”, and shake at idle. The engine loses power and gasoline consumption increases. This is, of course, bad.
It is much worse when spark plugs that are too “hot” are installed in the engine, that is, those with a lower heat rating. Due to the high temperature of the electrodes and the thermal cone of the insulator, the combustible mixture, entering the cylinder, is ignited not by a spark, but by the hot parts of the spark plug. This happens “spontaneously” - sometimes earlier, sometimes later, the engine suddenly loses power, runs after the ignition is turned off, and the valves and piston may “burn out.”
Highly accelerated, high-speed engines are usually equipped with “cold” spark plugs. They feel great under heavy loads, but long periods of idling or light loads will lead to the formation of a layer of carbon deposits.
Engines with an average degree of boost, for example VAZ engines, require spark plugs with an average heat value.
Low-speed, unboosted engines are equipped with spark plugs with low heat ratings – “hot”.
What you need to know about the marking of spark plugs and which ones to put on the VAZ-2107
According to domestic GOSTs, this is A17DVRM , where 17 is the heat number (candles are produced from 10 to 23 units). The remaining letters indicate design and dimensional features. Today we need the letter “P” to indicate that a noise suppression resistor is built into the spark plug.
Here is an example of NGK markings: BPR6ES11 . Here the number 6 is the heat number (on a scale from 2 to 13 units), the letter R indicates the presence of a resistor. Expensive brands of candles have the letter “Z” instead of “R” - this is an inductive resistor, it does not lead to loss of spark energy. The number “11” at the end of the mark indicates a gap of 1.1 mm. These spark plugs are suitable for injection “seven”.
For carburetor models, choose spark plugs without the letter “P” or “R” in the marking: A17DVM, BP6E . They do not have a built-in noise suppression resistor, which will weaken the already not very powerful spark.
Expensive spark plugs with platinum and iridium electrodes have good performance and last a very long time. But it is very difficult to find a model for carburetor engines among them - they all come with a built-in resistance. The solution is to select a model with an inductive resistor (Z in the marking).
Below you can see recommendations for candles from other manufacturers.
For classic VAZ models with contact ignition
For models with contactless protection
For injection engines
This list, of course, is not complete; there are a lot of manufacturing companies.
How to choose high-voltage wires
An error in the choice of wires can lead to poor engine starting, increased fuel consumption, unstable operation and “dullness” during acceleration. The thing is that the wires are now made of silicone, with a graphite central core and increased distributed resistance. This is done to reduce the level of electromagnetic interference that can interfere with the operation of numerous on-board electronics. Injector ignition systems have very high spark energy and these wires are ideal for them. But for carburetor cars, wires need to be selected with the least resistance. The best you can find is from 2 to 4 kilo-ohms per wire; “zero” wires with a copper core cannot be found on sale at all. How to choose? Take a multimeter with you and ask the seller for permission to “measure” several sets from different manufacturers. And sometimes the resistance value of the wires is marked on the packaging. In the distributor of carburetor cars, or rather in its “runner”, another noise suppression resistor is installed. This “relic of the past” needs to be replaced with a suitable piece of wire, because the function of this element is now performed by high-voltage wires.
DIY replacement instructions
Replacing spark plugs on VAZ 2114 and 2115 is not a complicated process. This work can be performed by any motorist, following the step-by-step instructions given below.
Tools and materials
To carry out the procedure you need to prepare:
- key for removing protection;
- a set of round probes;
- spark plug key;
- new set of SZ.
To avoid counterfeiting, you should purchase original products.
The process of dismantling and replacing SZ
Unscrewed from the SZ socket
The procedure for unscrewing and replacing spark plugs must be performed on a cooled engine to avoid burns.
The process itself consists of the following steps:
- First you need to open the hood. Then you need to remove the protection from the engine, if present.
- After removing the decorative trim, you need to remove the protective caps with high-voltage wires that are placed on the contacts. The caps should be removed carefully so as not to damage the wiring.
- The areas near the NW should be cleared of dirt so that they do not get into the engine cylinders.
- Now, using a spark plug wrench, you need to unscrew the S3 from the cylinder head. You can start twisting from any side. First you need to move it from the dead center, and then you can carefully unscrew the SZ from the socket.
- Having turned out the old SZ, you need to wipe the thread with a rag.
- Before screwing in new products, it is advisable to check the gap on each of them. For cars with an injector, it should be from 1 to 1.13 mm.
- Installing the SZ is the same simple procedure as unscrewing; it is carried out in the reverse order. New products are placed in the seats of old candles. You need to screw it in carefully so as not to damage the threads in the cylinder head or on the product.
- Next you need to put on the ends of the high-voltage wires. In this case, you need to make sure that the numbers of the wires that are printed on them match.
- At the final stage, the decorative overlay is returned to its place.
After replacing the SZ, it is necessary to observe how the engine operates. If it works intermittently, it is possible that one of the SZ has defects. To detect it, you need to sequentially disconnect each high-voltage wire. A faulty spark plug should be replaced.
Price issue
High-quality products always cost more. Domestic products are several times cheaper, but the quality leaves much to be desired. Therefore, it is worth buying imported candles that will last much longer than domestic ones. At the same time, the service life of the engine will be extended, and fuel will be consumed more economically.
1. Czech SZ Brisk (price per set from 275 rub.)
2. Set SZ Denso (price from 121 rub.)
3. SZ company NGK (price from 180 rub.)
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Applicability of spark plugs on VAZ cars: 8 comments
Hello. On VAZ 21093 with a contactless ignition system, A17DVR or their analogues from different manufacturers are installed. The resistance of the spark plug noise suppression resistor is 5 kOhm. The resistance of high-voltage wires for VAZ 21093 is 3.5 - 10 kOhm. The resistance in the wire may increase if its central core is damaged. For the engine 21083 of the VAZ 21093, it is best to install high-quality high-voltage wires that are intended specifically for it, not zero.
Hello. Question: VAZ-21093 carb. Which spark plugs are better to install A17DV with or without a resistor? And regarding high-voltage wires and spark plugs, there is also a question: what is the maximum allowable resistance of the resistor in the spark plug, since over time it can also increase the resistance of high-voltage wires. And does it make sense to install wires of zero resistance (as they used to be on cars, just a copper wire)?
This manufacturer believes that this is acceptable. IW20TT, W20TT, W20EPR-U - spark plugs that they offer for VAZ classics in addition to those indicated in the article. Here is their catalog page: https://www.denso-am.ru/elektronnyi-katalog/
Platinum's resistance to erosion and corrosion has enabled DENSO to create spark plugs that can operate reliably for up to 100,000 km.
because the BRISK L15Y spark plugs have a gap of 0.7, which is bad for 21083, but the NGK BP6E is just perfect for you!
I've been constantly installing NGK BP6E on my same VAZ 21083 lately. The similar BRISK L15Y is no worse and there is not much difference between them. But for some reason, BRISK candles are fake more often than NGK ones. At first they work well, then they begin to fail one by one. Therefore, when choosing candles, you have to rely on personal experience, the experience of friends and reviews on the Internet. There are practically no differences in the performance of spark plugs (power, efficiency) BRISK L15Y, L15YC, LR15Y. All of them are suitable for engine 21083.
So, what are the best candles to take? I have a VAZ 21083 carburetor engine with a contactless ignition system, I constantly use the BRISK brand, the article indicates 3 types L15Y, L15YC, LR15Y and which of these three should I take or select at random?
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Carburetor spark plugs on the injector, what are the dangers of this?
Spark plugs for an injection engine have internal resistance, unlike carburetor plugs. A plug that works normally under normal conditions has a predominant brown-yellow tint. Spark plugs for a carburetor engine must, among other things, have no internal resistance. If ours, then A17 DV-10. Spark plugs marked A17ДВРМ are not suitable for 21099 with a carburetor engine, and even more so for classics with simple battery ignition, where the spark is weak compared to modern ignition systems. With them there will be a failure when starting, etc. Verified. The letter P means the resistance in the spark plug is about 6-8 kohms. The resistance of the central electrode of the spark plug, which is composite in design (of 3 parts), is measured with a simple tester. In the working spark plug, a slight resistance is allowed (if dirty, smoked) (up to 2 ohms), at which there will be no disruption of sparking. . Only one thing can be said about the gap between the electrodes: the stronger the spark, the larger the gap between the electrodes is allowed. There is a simple battery ignition. There is a gap of 0.5-0.6 mm due to the fact that the coil can only produce 16-18 kilovolts. The kilovolts increased to 20-25 with transistor ignition, the gap became 0.7-0.9. When they began to use dry coils capable of delivering 25-30 and 35 kilovolts, the gap became 1-1.1 or more. Spark plugs with resistance began to be used on injection engines, but practice shows that spark plugs without resistance work better and are less dirty because the spark is more powerful there. As for radio interference when sparking candles, only the Almighty can evaluate this. . A17 DVM Spark plug A17DVM is designed to ignite the fuel-air mixture in the engine cylinders of VAZ 2101-2107 cars and their modifications before 1988. The A17DVM spark plug has a bimetallic central electrode - a copper core is pressed into a nichrome shell, which provides increased wear resistance of the electrode compared to materials used by other spark plug manufacturers. The bimetallic electrode used also improves the ability to remove heat and increases resistance to carbon formation. All this ensures optimal engine operation under various operating conditions and gasoline savings. Spark plug A17DVM is similar in characteristics and is interchangeable with spark plugs of the following brands: AC DELCO C42XLC BERU 14-7DU BOSCH W7DC CHAMPION N9YC FLASH-POINT FP2C EYQUEM C62LS NGK BP6ES
VAZ spark plugs - how to choose, the best
Tips on how to choose spark plugs for VAZ cars: 9 popular models of spark plugs, nuances of choice. Video about installing spark plugs.
When servicing cars with gasoline engines, special attention should be paid to the correct selection of spark plugs. If you buy an incompatible part, this can cause failure of the power plant, lead to increased fuel consumption and a number of other troubles. Let's consider the main criteria for choosing spark plugs when servicing a vehicle yourself. Despite the simple design, such a component is a high-tech development with precise geometric shapes and dimensions.
BRISK Classic L15Y
A characteristic feature of the Classic L15Y model is the ability to operate at reduced secondary voltage energy, which is suitable for older VAZ cars. A slightly lower heat rating and a small gap allow you to confidently start the engine at sub-zero temperatures; the spark plug warms up quickly and is not prone to sparking and carbon deposits.
However, because of this, the products may fail under loads and high temperatures, but for low-powered classic VAZ engines this will not be a discouraging factor. The service life is average in the class of budget candles based on copper and nickel.
The cost in the store is about 80 rubles per piece.
Basic tips for choosing spark plugs for VAZ
Representatives of the AvtoVAZ automaker advise choosing spark plugs taking into account the following features:
Using the tips listed above, you can choose a truly high-quality part, reducing the frequency of vehicle maintenance.
The list contains 9 modifications of spark plugs that are suitable for VAZ cars. The selected models are distinguished by good build quality and trouble-free operation. This is the best there is on the market.
The undisputed leader of the rating is the NGK B9Eg-3530 model, which is supplied to AvtoVAZ enterprises as a standard part for cars.
The product has nickel coating on the electrodes, which prevents the appearance of scale and is responsible for the correct firing of the spark. This saves fuel and prevents catalyst wear. The advantages of the NGK B9Eg-3530 spark plug include:
No deficiencies were identified during testing of NGK B9Eg-3530 spark plugs. The owners claim that the part copes with its tasks efficiently and lasts as long as possible.
Denso PK20PR-P8 for VAZ
The next line on the list is the Japanese product Denso PK20PR-P8. This kit is well assembled and has a long service life. The presence of plastic solders on the electrodes contributes to the correct spark penetration and the resistance of the part to corrosion or mechanical stress.
The model is in demand due to the optimal price-quality ratio, as well as its prevalence on the market. The negative aspects are associated with the difficulties of choosing the appropriate series due to the wide range in the company’s model range.
Good spark plugs Brisk Extra Dr15Tc-1
Owners of Lada Kalina cars and other relatively new AvtoVAZ models speak positively about Brisk Extra Dr15Tc-1 spark plugs. The release has a unique design of working elements, has 3 electrodes and guarantees the elimination of misfire problems even with old batteries or when using low-quality fuel.
However, the Brisk Extra Dr15Tc-1 spark plug is not suitable for all VAZ models.
Bosch Platinum WR7DP
The product of the German company Bosch has earned respect from car owners due to its compatibility with the latest car models from VAZ. The modification with platinum coating ensures correct operation of the system for 60 thousand km, which is a record figure in comparison with standard editions.
The presence of a thin core with a proper fit to the insulator contributes to the timely transfer of excess thermal energy and stabilization of engine behavior at peak speeds. Such features are highly valued by fans of high-speed driving or driving in poor terrain.
The advantages of this series of spark plugs boil down to excellent workmanship, unusual design and stability of operation. The only negative is the slightly overpriced.
Bosch WR7DPX
The top five spark plugs for VAZ include the BOSCH WR7DPX series, which is produced in China, but fully complies with European quality standards. The model is adapted for power plants in Lada X-ray cars. It has a thin electrode coated with a special alloy, which facilitates correct operation for a long time, even at a critical battery charge level.
The presence of a reinforced insulating layer ensures effective heat removal from the point where the arc occurs. Such characteristics contribute to high-quality performance, especially in high-load engines that operate under conditions of frequent overheating and high crankshaft speeds.
BOSCH WR7DPX is popular due to its stable operation, long service life and minimal number of counterfeits. However, such spark plugs are quite expensive and are not installed on simple engines.
NGK BPR6 ES-11
This series of spark plugs is well suited for Lada Granta cars. NGK BPR6 ES-11 is made at a French plant, which is a guarantee of high quality workmanship. At the same time, spark plugs are relatively cheap, so their appearance is far from ideal.
The model is optimally suited for both old and new engines. Its main disadvantage is the variety of fakes on sale.
BRISK LR15YCY-1
BRISK LR15YCY-1 – high-quality spark plugs with an increased offset of the working part. They are suitable for VAZ 2107 carburetor engines with an 8-valve configuration.
In terms of performance properties, this budget kit is not inferior to many expensive editions. Therefore, it can be used not only for VAZ cars, but also on some used foreign cars.
The product generates a spark even at a voltage of 6.2 V internally, which is much better than competing models. The only drawback of candles is the high price.
DENSO W20EPR-U11
The DENSO W20EPR-U11 kit is designed for injection engines, providing an optimal balance between price and quality. The model is relevant for old VAZ 2106 cars and more recent new products from the domestic automobile industry.
It implements a special technology that improves the stability of spark generation. Such innovations have had a positive impact on the service life of the part and reduced the frequency of car maintenance. This also reduced the voltage sag to 6.5 V.
EZ A17DVRM
The rating is completed by the spark plug ZZ A17 DVRM. The kit is widespread in the domestic market due to its stability and good workmanship. In the original box it is impossible to see a defective version or a model with a broken gap. Additional advantages include active operation even when the voltage drops to 6V in the on-board network. Such spark plugs are common on VAZ 2106 cars due to their low cost.
Conclusion
Choosing a spark plug for a VAZ is an important process that requires special attention from the car owner. Therefore, in order not to make a mistake in selecting a suitable model, you should take into account all the nuances and selection criteria.
Video about installing spark plugs:
Tips on how to choose spark plugs for VAZ cars: 9 popular models of spark plugs, nuances of choice. Video about installing spark plugs.
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Which spark plugs for VAZ are better to choose?
There are a large number of different modifications of the part, which complicates life for motorists. The problem is that each motor is designed for a specific type of spark plug. If you supply the wrong part, a number of negative consequences can arise.
Also, depending on the inconsistencies present, other malfunctions may “pop up” that reduce the comfort of using the car.
What to look for when choosing.
Specialists from the AvtoVAZ plant recommend selecting spark plugs according to a number of parameters.
By adhering to the specified parameters, a car enthusiast can buy a fairly high-quality product, while saving on the frequency of car servicing and repairs.
Checking the spark plugs
Checking spark plugs is quite simple; their condition can even be assessed visually. To do this, just unscrew the spark plugs and check their condition and compare them with the picture below.
Even if the spark plug is externally in excellent condition, this does not mean that it is working properly. To definitely ensure that the spark plug is working properly, you need to replace it with a new one or swap it with a spark plug from another cylinder. If this spark plug does not work on another cylinder, then there is a breakdown in it, and if the spark plug starts working, then most likely the problem is not in the spark plug.
LADA spark plugs: top 10 options
The rating contains 10 modifications of spark plugs, without division into specific car models.
10th place: ZZ A17 DVRM
The list of the best offers opens with an effective model that is in demand among a large number of buyers. Such prevalence is ensured by the stable quality of products. In the original packaging it is impossible to find a defective part or a spark plug with a broken gap. A significant advantage of the products is the ability to work actively even when the voltage drops to 6V in the on-board network. Similar spark plugs in the VAZ 2107 are often found due to their moderate cost.
The indicators are overshadowed by bad statistics - as of 2020, 35% of the kits on the market are fakes, which forces motorists to carefully select products in stores.
9th place: TZ 17 DVRM
The next representative of the rating implies the presence of as many as three electrodes on the working part of the device. A large number of motorists install such spark plugs on a VAZ carburetor or even an injection type. Thanks to the use of advanced developments in design, the manufacturer has increased the service life of the electrode.
Pirate copies also play a role here - there are a large number of them, which makes buyers cautious about purchasing products.
8th place: DENSO W20EPR-U11
If you want to buy VAZ injector spark plugs, you can turn to the eighth position of the rating. Candles represent a compromise between high quality and moderate cost. Thanks to this symbiosis, such spark plugs are perfect for the VAZ 2106. Also, this model will be relevant for more modern versions. It uses technology to increase spark stability. The development significantly increases the service life of the part, which helps save on vehicle servicing. This also made it possible to reduce the maximum voltage drop to 6.5 V, which is less than that of Russian analogues, but thanks to stability, the spark plugs win positions.
7th place: BRISK LR15YCY-1
The next contender for the title of best is distinguished by an increased overhang of the working part. The specified spark plugs for the VAZ 2107 carburetor are ideal. The standard eight-valve engine works great with the included model.
In terms of performance parameters, the model is a confident average and can be used even on used foreign cars with similar engines. The ability to work on a dead battery has also been developed. The product is capable of igniting the mixture even at 6.2 V within the network, which is significantly better than the performance of competitors’ analogues. Buyers consider the rather high cost to be the only serious disadvantage.
6th place: NGK BPR6 ES-11
The specified spark plugs for the Lada Granta are quite suitable. The model stands out among its competitors because it is manufactured in France. European quality did not suffer even with a fairly successful attempt to reduce the cost of products. The design and appearance of the part leaves much to be desired. Here you can find an unevenly soldered electrode or a damaged manufacturer’s logo.
On the other hand, the models work excellently for a long time and do not react significantly to piston wear - the spark plugs react normally even to oil getting on the working surface. A good and stable spark breaks through even on “smoky” electrodes.
5th place: BOSCH WR7DPX
The top five is topped by a model produced in China, but the quality has not suffered. The specified spark plugs and Lada X-ray are ideal for each other. The minimum thickness of the electrode, supplemented with high-quality metal, guarantees stable operation during critical battery drawdowns, and the reinforced insulator quickly removes excess heat from the site of arc formation. These parameters guarantee excellent performance in highly loaded engines operating at constant overheating and high crankshaft speeds.
4th place: Bosch Platinum WR7DP
The next representative of the German brand will be the correct answer to the question of which spark plugs are best for Lada of the latest generations. The plasma modification with platinum coating is capable of operating stably for up to 60,000 kilometers, which is unattainable when using standard varieties. The thin core is closely matched to the ceramic insulator, which allows you to quickly remove excess heat from the working area and stabilize the behavior of the engine at maximum speed. Such parameters are very much appreciated by fans of fast driving and heavy loads.
A significant advantage of candles is the excellent quality of production and a high degree of protection against counterfeiting.
3rd place: Brisk Extra Dr15Tc-1
Modern car enthusiasts often install these spark plugs on Lada Kalina and similar car models. The unique design of the working part, with three electrodes, ensures a complete absence of misfires even with a tired battery or when using second-grade fuel.
Another advantage of the design is the minimum number of counterfeits. Spark plugs are difficult to counterfeit due to the characteristics of their insulators and electrodes.
2nd place: Denso PK20PR-P8
The product produced at Japanese factories falls slightly short of the leading position. The factor guarantees excellent workmanship and an extended service life.
Platinum soldering on both electrodes ensures stable spark penetration and resistance to corrosion and mechanical wear.
1st place: NGK B9Eg-3530
The clear leader stands out because the brand's products are delivered to the factory's conveyor belt. Therefore, when asking which spark plugs are best for VAZ, it is recommended to pay attention to the brand’s products.
Nickel coating on the electrodes prevents scale formation and guarantees stable spark operation, which saves fuel and protects catalysts from premature wear.
This rating is based on the preferences of motorists and sales statistics of retail outlets. The list did not include many good modifications due to negative reviews or low distribution on the market.
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see also
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Spark plugs are used to ignite the air-fuel mixture in the combustion chamber of carburetor or injection gasoline engines. For each type of gasoline engine, “native” spark plugs are produced, recommended by the manufacturer, fully meeting its thermal and power characteristics. spark plug markings are applied to them.
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Spark plug markings
Each spark plug has a special marking that allows you to determine its type, design and purpose. Plugs are also divided into spark plugs for carburetor engines and spark plugs for injectors. Today there is no uniform marking of candles and for the same candle with similar parameters, each manufacturer uses its own designation for it.
Russian spark plugs
In Russia, there is a unified labeling of candles for all manufacturers that meets the requirements of the state standard - OST 37.003.081. The marking of Russian candles includes letters and numbers, for example, A11, A17, A23, A26DV, etc., where:
• The first letter is the spark plug thread size. In most cases, this is a standard thread size - M14x1.25, designated “A”. When the first letter is “M”, it will be a thread – M18x1.5 (similar candles were used before); • The number after the first letter indicates the heat value. The lower the number, the higher the temperature the spark occurs; Russian manufacturers produce candles with a heat value from 8 to 26. The most popular ones are candles with numbers - 11, 14, 17 and 23. Depending on the number, candles can be “cold” and “hot”.
Cold and hot candles
Cold spark plugs are designed for highly accelerated engines. For example, a spark plug for VAZ engines is A 17 DV: standard thread, heat rating -17, D - thread length 9 mm (the letter is missing when the thread is shorter), B - protruding cone of the spark plug insulator. The spark plug may also have the following marking – A17DVR, where the letter “P” indicates the presence of an interference suppression resistor in the central electrode. If there is an “M” at the end of the marking, then the shell of the central electrode is made of heat-resistant copper material. The spark plug is AU17DVRM, where “U” denotes the increased size of the hexagon for a spark plug wrench -16mm (usually 14mm), when the hexagon size is 19mm, then instead of “U” there will be the letter “M”, for example - AM17B.
