NGK spark plugs: selection by car

What are the features of Japanese NGK spark plugs, and how to select the right one for your car?

NGK spark plugs: selection by vehicle

Home » Spark plugs » What are the features of Japanese NGK spark plugs, and how to select the right one for your car?

The Japanese company NGK produces high-quality components for internal combustion engines and is one of the world leaders in this field.

It is constantly engaged in new developments, improving its products, increasing their technical and operational characteristics, as well as increasing the service life of NGK spark plugs. Products are produced in a wide range.

To choose the right NGK spark plugs, you need to know their main characteristics (author of the video - Tips for a car enthusiast).

Range

To improve the quality of products, the manufacturer NGK uses the latest high-quality materials using the latest technologies. The series consists of 7 types of candles with different parameters, each of them has its own characteristics. The series includes single-electrode products, modified by the company’s specialists.

Thanks to small changes, it was possible to achieve effective operation of the products. A notch in the shape of the letter V was applied to the central electrode. This made it possible to redistribute the potentials to the edges, where gasoline vapor is more concentrated. This ensures ignition.

When producing NGK multi-electrode spark plugs, the latest technologies are used, which ensure reliability through duplication. This guarantees the occurrence of a spark under any operating conditions.

The number of side electrodes can be from 2 to 4. They are located evenly in a circle around the central electrode.

Thanks to this design, the products are less clogged, and the service life of NGK spark plugs is also increased.

Soldering is done on the side electrodes from the inside. Iridium and platinum are used as soldering. This extends the life of the spark plugs.

Standard single electrodes are used on many vehicles. The V-shaped notch made it possible to redistribute potentials to the edges, where a large amount of fuel vapor collects. This guarantees 100% ignition of the fuel assembly.
Multi-electrode products use the principle of duplication, which allows for stable spark formation, even if low-quality fuel is poured.
Elements with an additional spark gap are used for operation in conditions with increased soot.
With a semi-sliding surface discharge, they guarantee a cold start even if there is a lot of soot on the insulator. In this case, the soot burns at a temperature below the temperature at which self-cleaning occurs.
Hybrid ones combine a semi-sliding surface discharge and a platinum tip.
The middle electrode has an iridium tip. This is the strongest material that is resistant to spark erosion. The service life of iridium spark plugs is twice as long as that of conventional spark plugs.
Platinum products have a platinum solder on the electrode, which ensures constant power throughout the entire service life.
Spark plugs for racing cars can withstand increased loads, vibrations, high pressure, and elevated temperatures. The side electrode in the form of a ring prevents the spark from slipping; it goes to the central electrode.
NGK LPG LaserLine products are specially manufactured for power units running on gas. Thanks to platinum inserts on the electrodes and an iridium tip, the products are resistant to high gas combustion temperatures. A special coating protects the housing and copper core on the central electrode from overheating.

Advantages and disadvantages of products

Reviews about the spark plug, as well as about the NGK ignition coil, are mostly good, since NGK products are distinguished, first of all, by their high quality.

But besides this, there are a number of advantages that spark plugs br6hs, bpr6es, bpr7hs, bpmr7a and other models have:

Platinum and iridium products have an alumina ceramic insulator. It is an excellent dielectric with good thermal conductivity, and also has high strength;
the corrugated tip eliminates spark overlap;
high thermal conductivity, provide heat removal, protecting the spark plugs from overheating;
due to its high strength, the insulator will protect the product from damage during strong heating or cooling;
the design of the candles is sealed;
a high heat rating and a long service life of NGK spark plugs are ensured by a copper core, which has high thermal conductivity and low resistance;
have good resistance to soot;
High-quality cold-rolled thread makes it easier to unscrew the spark plugs.

Compared to analogues, NGK spark plugs have a long service life, high spark generation efficiency, durability and quality.

Marking

NGK spark plugs are supplied in separate packaging. To facilitate selection by vehicle, markings are applied to the product body.

To choose the right candle correctly, you need to know the decoding.

Below we will consider the decoding using the example of spark plug bcpfr6a - 11:

BC - thread diameter and key size (A - 1.8 cm, C - 1 cm, D - 1.2 cm, E - 0.8 cm, AB - 1.8 cm, BC and VC - 1.4 cm, DC - 1.2 cm);
P – type of spark plug (D – with increased reliability, I – iridium, L – with extended thread, P – platinum, S – platinum with increased reliability, Z – with a spark ring protruding along the edge of the skirt). These designations can be indicated in various combinations;
F – body dimensions used for unscrewing;
R – is there an interference suppression resistor;
5 - heat number (the value ranges from 2 to 13, the lower the number, the “hotter” the candle);
A - special characteristics;
11 – interelectrode gap.

There are other characteristics that describe the feature of a particular spark plug: S – with a sealing washer, A – without a sealing washer, G – the presence of an additional side copper electrode, D – the body has an anti-corrosion coating and others.

The marking will simplify the selection of products for a specific car model from the NGK catalog (video author – StarsAutoCom).

Selection options

It is known that power units have different heating temperatures, so when selecting, you need to take into account the heat rating. For each vehicle it is indicated in the owner's manual. There are analogues that fully correspond to the originals installed at the manufacturing plant. The markings are on the body and packaging.

There are special programs for decrypting it. They help you select products for your car. To go to the page where you can select a product, you need to select the catalog of interest. It is possible to select spark plugs for a specific make and model of car. Even a novice user can figure it out.

Original vs fake: how to tell the difference?

Due to the popularity of NGK products, many counterfeits have appeared on the market, which increases the risk of buying a counterfeit. In order not to purchase fake NGK spark plugs, you need to know the main differences between the original and the counterfeit, what you should pay attention to when purchasing. There are several features that can be detected by visual inspection:

Fake spark plug

The original box has high-quality sizing, the applied paint adheres well, the slots are made neatly and evenly. The marking is applied clearly, evenly and does not wear off over time.
The original insulator uses high-quality ceramics; there may be residues of ceramic powder on the metal body.
The central electrode is precisely located in the center, its rod should be copper. The sparking end of the insulator must be free of contamination. The side electrode must be smooth.
On the original, the threads are knurled, not cut. It should not be jagged or uneven.
The nut on the terminal is tightly screwed in; it takes a lot of effort to loosen it.
On a fake, the logo may be applied incorrectly.
The original hexagon must have a code on it.

Price issue

When purchasing NGK car spark plugs, you should not save money by buying a cheaper option. Thus, you can run into fake candles that will not last long or will work ineffectively.

1. BPR6ES (price from 250 rub.)2. D-Power (price from 900 rub.)3. LPG Laser Line (price from 960 rub.)4. Iridium IX kit (price from RUB 3,390) Loading...

Video "Spark plugs"

This video describes spark plugs: design, heat rating, types, markings.

Do you have any questions? Specialists and readers of the AVTOKLEMA website will help you ask a question

Source: https://avtoklema.com/svechi/ngk-podbor-po-avtomobilyu-2948/

NGK spark plugs: technology, characteristics, markings

At the moment, the Japanese company NGK Spark Plug Co., Ltd. confidently holds the title of world leader in the production of spark plugs for almost all gasoline-powered equipment: from small-capacity lawnmower engines to multi-liter trucks.

NGK spark plugs are a “strong middle ground”; they are guaranteed to be able to withstand the specified parameters at the required mileage, without emphasizing any one parameter to the detriment of overall functionality. Therefore, NGK maintains its leadership in supplies directly to car factories. What is important to them is that “original” (i.e.

spark plugs purchased from a third-party supplier under their own brand) did not cause any problems during service runs throughout the entire warranty period.

ngk technologies

The classic design of a spark plug seems to have remained unchanged for at least half a century. However, in modern conditions, when environmental requirements are constantly growing, such candles are of little use.

The relatively large area of the electrodes on which the discharge occurs requires an increase in voltage; the spark itself, “floating” on the surface of the electrodes, does not guarantee strict maintenance of the torque and speed of propagation of the flame front.

The V-Line technology developed by the company has become a simple and effective solution to the problem for most internal combustion engines. The essence of the technology is to apply a V-shaped groove to the end of the central electrode, running parallel to the side electrode. Denso also uses essentially similar technology, but to circumvent NGK patents, they make a groove on the side electrode.

For spark plugs made using V-Line technology, while maintaining other parameters, the area of space in which sparking is possible is noticeably reduced.

With the same ignition system, the electrostatic field strength between the electrodes increases, that is, the power and stability of the spark increases in comparison with traditionally designed spark plugs.

In addition, the spark always jumps “from the edge”, where the spark gap is better ventilated - when operating on lean mixtures, this improves the stability of the engine, especially at idle.

NGK spark plugs with a semi-sliding surface discharge are interesting: unlike traditional multi-electrode designs, here the central electrode is completely recessed into the insulator.

The advantage of such products when working on rich mixtures or in worn-out engines: deposits of conductive carbon deposits here have little effect on the efficiency of the spark plug, and it becomes capable of working even with heavy contamination.

If we recall NGK or platinum iridium spark plugs, their advantages over classic ones are obvious: much more stable sparking due to the small diameter of the central electrode, and minimal erosion rates - and therefore the longest resource compared to other types. It is not for nothing that representatives of this line are installed in modern engines from the factory.

However, even here, NGK engineers found room for new experiments. The hybrid spark plugs they created have a central platinum electrode that works in tandem with a side electrode.

The side electrode has a platinum solder and two additional electrodes that work on the same principle as is used in spark plugs with a semi-sliding surface discharge.

When a spark plug becomes dirty, additional electrodes come into play, allowing the engine to operate stably until it warms up to the point where the carbon burns out.

Decoding the marking of ngk candles

The products of this company are coded with a formula like 123456-7.

installation thread diameter and hexagon size (A – 18/25.4 mm, B – 14/20.8 mm, C – 10/16 mm, D – 12/18 mm, E – 8/13 mm, AB – 18/ 20.8 mm, BC – 14/16 mm, BK – 14/16 mm, DC – 12/16 mm). That is, for the usual VAZ car spark plugs, the first symbol in the marking should be B, for example.
type of execution (P – protruding insulator, M – compact spark plug, U – with surface discharge).
type of noise suppression (R – resistor, Z – inductance). On spark plugs that do not have additional noise suppression, the third familiarity is skipped (for example, in BP6ES).
heat number. At NGK it is designated by numbers from 2 to 10, the direction of numbering is familiar to us according to the domestic standard (that is, “two” is the hottest, and “ten” is the coldest). The applicability of NGK in terms of heat rating and their compliance with the markings of other manufacturers can be described as follows:
length of fastening thread (E – 19 mm, EH – 19 mm with shank partially without thread, H – 12.7 mm, L – 11.2 mm). If NGK does not have an O-ring, but a conical fit, then the letter F is used, and the thread length is, depending on the first sign element, 10.9 mm (plugs A), 11.2 mm (plugs B), 17.5 mm (plugs B *EF). For example, on the NGK AR8F the marking indicates a thread length of 10.9 mm with a conical seal. For compact spark plugs, this familiarity is skipped, since their thread length is always 9.5 mm.
spark gap size. This familiar place is always separated by a hyphen, and if it is not in the marking, then a standard gap is set: for cars 0.8-0.9 mm, for motorcycles 0.7-0.8 mm. The gap is indicated in tenths of a millimeter as an integer, that is, 8 means a gap of 0.8 mm, and 15 means 1.5 mm.
design features of the candle. There are many options here:

B	Fixed contact nut
C.M.	Angled side electrode, compact design (insulator length 18.5 mm)
C.S.	Likewise
G,GV	Racing spark plugs
I	Iridium electrode
IX	Advanced Iridium Electrode
J	2 specially shaped side electrodes
K	2 side electrodes
-L	Intermediate heat number
-LM	Compact type (insulator length 14.5mm)
N	Special side electrode
P	Platinum electrode
Q	4 side electrodes
S	Standard type
T	3 side electrodes
U	Semi-surface discharge
VX	Platinum spark plug
Y	Center electrode with groove (V-Line series)
Z	Special design

Let's decipher the NGK BPR5ES-11 marking as an example. It has a 14 mm connecting thread for a “21st” spark plug wrench, a protruding insulator, a conventional noise suppression resistor, a heat rating of 6, a threaded shank 19 mm long, a standard design, a spark gap of 1.1 mm.

Let's carry out the reverse selection - let's say a single-electrode spark plug with a 10 mm thread for the “16th” spark plug has been removed from the car, the thread length is 19 mm, the heat number according to the table corresponds to the number 10 for NGK, the gap between the electrodes is 1 mm.

Based on the known parameters, we are looking in the NGK catalog with the marking CPR10ES-10 (a classic type candle that matches the parameters of the existing one) or one that is as close as possible in marking.

Choosing ngk spark plugs for a car

However, this method is not very convenient.

If we take into account the huge range of products produced by the company, then the best selection of NGK for a car is to use the company catalog, which is initially sorted by make, model, year of manufacture and engine size.

It is available on the company’s website both in printable form (in the “Files for downloading” section, and in an interactive version (section “Product Selection”). Finding suitable candles here is not difficult, even for an old Moskvich:

How to spot a fake

The downside of popularity is the huge amount of counterfeit products on the market.

To be convinced of this, you don’t even have to go to a car store: on Ebay or Aliexpress, type “spark plug” in the search, and it will immediately give you a huge number of candles in familiar packaging and, of course, from China.

Such volumes of counterfeit goods have already seriously damaged the company’s reputation - in many car repair shops to this day, in case of any problems with ignition, the first answer is “You first install normal spark plugs, not NGK ones.”

So, how can you spot a fake on a display? Let's start with the packaging. The slightest “jambs” in printing clearly indicate a cheap counterfeit; the boxes of original candles are always perfect.

The workmanship itself speaks for itself.

The contact tip of the original NGK seems to be made in one piece with the spark plug: it is impossible to unscrew it with your fingers. Markings on the insulator and metal skirt must be clear and even.

The threads on original products are rolled, so they are always smooth and even. The roughness of the carving and the marks of the chisel indicate a dubious origin.

Crooked electrodes, especially deviation of the side electrode from the central axis, is also a reason to refuse the purchase.

With counterfeit V-Line spark plugs, the direction of the groove in the central electrode is almost always disrupted - if at the factory, when soldering the side electrode, it is centered exactly along the groove, then with “basement” plugs their mutual orientation can be absolutely any. For candles with electrodes made of noble metals, since they are much more labor-intensive to manufacture, the differences from “singed” ones are even more striking, since it is unprofitable to fully maintain complex technology in the conditions of “left-handed” production.

Source: https://neauto.ru/osobennosti-svechej-zazhiganija-ngk/

Spark plug selection

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Spark plug selection

A spark plug is a small part without which a gasoline engine cannot operate, since it is the spark plug that ignites the air-fuel mixture.

It is necessary to select spark plugs based on the type of engine, as well as following the spark plug labeling instructions. However, spark plug manufacturers use a different designation system.

To select the correct spark plug, please refer to the spark plug marking table

Spark plug markings

The most important parameters of spark plugs are: connecting dimensions of the spark plug (length and diameter of the threaded part), heat rating, presence of a built-in resistor, position of the heat cone.

Which spark plugs to choose?

Selecting a spark plug based on the type of engine is important not only so as not to make a mistake with the size, but also to ensure that the spark plug works for a long time and efficiently.

Thus, units with turbocharging are much hotter than engines without it and, based on this, it is necessary to select spark plugs that can operate in harsh conditions.

This can be determined by studying such parameters as: heat rating, number of electrodes, electrode material, presence or absence of notches and other design solutions.

Spark plug heat number

The heat rating of spark plugs indicates the maximum permissible temperature when the spark plug is loaded. The higher the heat rating, the higher the maximum permissible temperature load.

The heating temperature range of the working surfaces of the spark plug, depending on the engine, ranges from 500 to 900°C.

If the selection of a spark plug was made without taking into account the heat rating, there is a high risk of glow ignition, that is, ignition not from a spark, but from a hot surface. The result of glow ignition is burnt-out valves, pistons, and a destroyed spark plug.

Low spark plug temperature is also bad because it causes soot particles to be deposited on the electrodes, causing the ignition voltage to leak through the soot layer and onto the vehicle's ground instead of producing a spark.

Number of electrodes

As you know, a spark occurs between the central and side electrodes, hence the question, what is the advantage of a large number of electrodes? The fact is that the discharge gradually damages the electrodes and if the number of electrodes is more than 1, then the discharge occurs where the electrical resistance is less than others. Thus, the spark “gnaws” the electrodes one by one, which significantly increases the life of the spark plug.

Selection of spark plug by electrode type

The main type of spark plugs is a nickel electrode with a diameter of 2–2.5 mm. The use of other metals - platinum, iridium - makes it possible to reduce the diameter of the central electrode, which significantly affects the quality of ignition of the mixture. Moreover, the thinnest electrode (up to 0.6 mm) is for iridium spark plugs.

A thinner electrode makes ignition more efficient, which increases power and, at the same time, ensures lower fuel consumption. Making spark plugs from iridium and precious metals also increases the life of the spark plug, since these materials are more wear-resistant.

The service life of a conventional spark plug with a nickel central electrode when operated on a fully serviceable and adjusted engine is about 10–15 thousand km. Increasing the number of electrodes and making the central electrode from other metals increases the service life of spark plugs to 100 thousand.

Design features of candles

Spark plugs differ not only in material and size, but also in all sorts of tricks that manufacturers use. The most common of these is M-shaped or V-shaped offset, when the point of spark generation is shifted, which increases the efficiency of ignition.

Some manufacturers, such as the Ukrainian company Plazmofor , produce a completely outlandish, at first glance, product - plasma pre-chamber candles. The innovation here is the pre-chamber, in which the central electrode is hidden. The spark goes from the central electrode to the inner circumference of the prechamber cone.

The spark plug prechamber communicates with the main combustion chamber through 4 holes (1 axial, 3 lateral). Tests show that these spark plugs are excellent at reducing exhaust emissions.

Spark plug markings

ParametersNGKBoschBriskRussian spark plugsThread length

Metal case size

Electrode material

Extra options

A – 18 mm B – 14 mm C – 10 mm D – 12 mm E – 8 mm G – PF 12 mm J – 12 mm AB – 18 mm BC – 14 mm BK – 14 mmDC – 12 mm	A – 12.7 mm, normal spark position; B – 12.7 mm, extended position; C – 19 mm, normal position; D – 19 mm, extended position; DT – 19 mm, extended spark position and three ground electrodes; L – 19 mm, far extended spark position.	A – 19 mm B – 19 mm D – 19 mm E – 26.5 mm F – 11.2 mm G – 17.5 mm H – 11.2 mm J – 9.5 mm K – 9.5 mm L – 19 mm N – 12.7 mm P – 9.5 mm R – 25 mm U – 7.8 mm NA – 12.7 mm T – 12.7 mm M – 26.5 mm S – 9.5 mm C – 26 .5 mm	No letters – 12 mmD – 19 mmH – 11 mm
F – 14×19 G – 14×19 J – 12×19 K – 12×19 M – 12x19T – 10×19	W – M14x1.25 F – M14x1.5 with flat sealing seat and SW16; M – M18 thread with a flat seal seat and SW25; N – M14x1.25 with a cone seal seat and SW16; D – M18x1.5 with a cone seal seat and SW21	A – M 10 x1 B – M 12x1.25 D – M14x1.25 E – M18x1.25 F – M18x1.5 G – M14x1.25 H – M14x1.25 J – M14x1.25 K – M14x1.25 L – M14x1.25 N – M14x1.25 P – M14x1.25 R – M14x1.25 U – M14x1.25 NA – M10x1 T – M10x1 M – M12x1.25 S – M10x1C – M10x1	A – M14x1.25
I – iridium central electrode P – platinum central electrode Z – increased gap PZ – platinum central electrode and increased gap IZ – iridium central electrode and increased gap V – gold-palladium central electrode W – tungsten central electrode VX – platinum central electrode and special side electrodeGV – Specially designed central electrode made of gold-palladium	C – nickel and copper alloy S – silver middle electrode P – platinum middle electrode O – standard spark plug with a reinforced middle electrode.	C – copper core E – central side electrode doped with yttrium with a copper core S – central electrode made of silver P – central electrode with platinum contact PP – central and side electrode made of platinum PY – central electrode with platinum contact, side doped with yttrium IR – iridium contact on the central electrode	Without letters – standard core M – copper core
R – with resistor C – Low angle ground electrode F – Cone seat G – Thin nickel alloy center electrode GV – Specially designed gold palladium center electrode J – 2 extended ground electrodes K – 2 ground electrodes M – 2 ground electrodes for Mazda rotary engine or insulator length 18.5 mm.T – 3 side electrodesQ – 4 side electrodesU – semi-surface dischargeX – Gap for increased performanceY – Center electrode with V-shaped notch	R - indicates that the spark plug has resistance to suppress radio interference.	R – protective resistance X – protective resistance against electrode burnout Y – remote insulator L – specially remote insulator D – remote insulator and 2 side electrodes T – remote insulator and 3 side electrodes G – not remote electrode and a solid electrode around the perimeter LG – a special remote insulator and a solid electrode around the perimeter Z – 2 auxiliary electrodes on the insulator and a solid electrode around the perimeterTX – 1 auxiliary electrode on the insulator and 3 side electrodes LT – a specially spaced insulator and 3 side electrodes.	K – conical supporting surface; B – thermal cone of the insulator protrudes from the housing into the combustion chamber.

Source: http://www.konsulavto.ru/selection_candle

Spark plugs, glow plugs

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Product code: 332408 2-stroke spark plug, analogue BP7HS for CN motorcycles Article: 4620753544116 Manufacturer IRBIS	70.00
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Product code: 476409 Spark plug 2 stroke. E7RTC, analogue of BPR7HB for NRG motorcycles Article: 4680329004833 Manufacturer NRG	80.00
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Product code: 353414 4-stroke spark plug, analogue of D8EA for CN motorcycles Article: 4627072924544 Manufacturer IRBIS	50.00
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Product code: 320941Spark plug AUDI 80(B3, B4), 100(44, 45), A6(C4), SEAT, SKODA Felicia, Octavia, VW Golf(2, 3), Passat(B3)Article: 101000036AA (BUR6ET) (NGK 3172/BUR6ET) Manufacturer VAG	525.00
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Product code: 476877Spark plug AUDI A1, A3, A4, A5, SKODA Octavia3, VW Golf7 OEM Article: 06K905611C (NGK 94833/PLFER7A8EG) Manufacturer VAG	810.00
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Product code: 383785Spark plug AUDI A3, A4(B7), A5, Q5 OEM Article: 06K905601B (NGK 94833/PLFER7A8EG) Manufacturer VAG	980.00
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Product code: 395831Spark plug AUDI A3, A4, A5, VW Sharan OEM Article: 06H905621 Manufacturer VAG	990.00
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Product code: 383786Spark plug AUDI A3, SEAT Leon4, SKODA Octavia3, VW Golf7, Jetta4 OEM Article: 04E905601 Manufacturer VAG	990.00
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Product code: 320942Spark plug AUDI A3, TT, VW Eos, Golf (4, 5), Multivan, Phaeton, Touareg, Transporter OEM Article: 101905606A (IZKR7B) Manufacturer VAG	680.00
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Back forward

Spark plugs perform an important function in the operation of a car engine. They are responsible for igniting the fuel-air mixture, and the operation of the entire machine and fuel consumption depend on how well the spark plugs are chosen.

To prevent the engine system from deteriorating, it is important to buy high-quality spark plugs and constantly monitor their serviceability.

Failure of at least one of them can lead to engine failure, so it is not recommended to skimp on these parts.

The replacement interval for these devices is usually written in the vehicle manual. Depending on the electrode material, spark plugs require replacement every 30–120 thousand kilometers.

However, if you notice a deterioration in power and interruptions in engine operation, you must immediately install new spark plugs. When replacing, pay attention to platinum series spark plugs.

Due to the platinum from which the electrode is made, it can be made thinner, which ensures a stable charge and increases the service life of the candle.

Source: http://www.xn--80aaasbafk1acftx0c6n.xn--p1ai/svechi-zazhiganiya

Selection of NGK spark plugs by car make

Every motorist knows well that the selection of spark plugs must be done according to the parameters recommended by the manufacturer. Today, the retail trade offers a huge selection of spark generators. In this article we will look at NGK spark plugs of which for the car will be described in detail.

Variety of NGK candles

About the manufacturer and products

History and modernity

The Japanese company NGK Spark Plug Co., Ltd is today one of the leading enterprises that offer consumers high-quality parts for internal combustion engines.

Like other Japanese-made products, NLC spark formers have earned the respect of motorists and remain in high demand.

They are reliable, have excellent performance and a long service life.

The company began its work as a small workshop in the 19th year of the last century, and today it is a large production with its enterprises in different countries of the world. The company has accumulated vast experience in the design and development of automotive parts. At the same time, great attention is always paid to improving manufactured products and increasing their operational parameters.

NGK spark plug range

The catalog of spark generators of this brand is very diverse - spark plugs of various types and designs are offered, having different characteristics .

And to make it easier for car owners to navigate, purchase spark plugs in full compliance with the stated requirements and not run into fakes (of which, by the way, there are quite a lot of them lately), we offer a brief overview of the products being manufactured.

This will help you make the best choice based on the car brand and ensure high-quality operation of your car’s engine.

NGK products (V-Line series) are designed for the correct operation of modern engines with very lean fuel. These spark generators contribute to reliable spark formation, and therefore combustion, in the engine cylinder block.

The main feature of products of this type is the highest reliability during operation under various modes, regardless of the quality of the fuel assembly.

NGK spark plugs

Main range of SZ NGK

To improve the quality of products, high-quality materials are used in production and innovative technologies are applied. The V-Line series includes 9 types of candles with different parameters. Each type has its own characteristics.

The series presents products that have one electrode , which are brought to perfection by the company's best developers.

Making minor changes allowed the spark plugs to function more efficiently. A notch in the shape of the letter V was applied to the electrode (central).

Because of this, the potentials are redistributed to the edges, at which the concentration of vapors of the working mixture is much higher. This creates a spark.

The production of SZ with several electrodes is based on duplication, which actually increases reliability. This ensures spark formation under various operating conditions.

The number of electrodes on the sides depends on the type of SZ and ranges from two to four. They are located around the electrode in the central part.

Spark plugs of this design are less clogged and have a longer working life.

Soldering is done on electrodes located on the side. For soldering, iridium or platinum is used - these metals increase the period of correct operation of spark generators.

Types of NGK spark plugs

As mentioned above, in the nomenclature list of manufactured products there are 9 types of spark plugs:

Standard ignition elements with one electrode. Great for cars of various makes and models. The notch in the shape of the letter V promotes the redistribution of potentials to the edges. This ensures uninterrupted combustion of the working mixture.
More complex multielectrode products are created using the duplication principle. This ensures stable sparking, even when refueling with insufficient quality fuel.
Spark generators that have an additional spark gap are designed for use in high soot environments.
Plugs with a semi-sliding surface discharge promote cold starting even if a large amount of soot has accumulated on the insulator.
The hybrid spark generator combines a semi-sliding surface discharge and a platinum tip.
NGK iridium spark plugs. Iridium is a very durable type of material that is highly resistant to erosion from spark formation. The working life of such ignition elements is 2 times greater than that of simpler modifications.
Elements with platinum soldering on the electrodes have constant power throughout the entire intended period of operation.
Special protective gear for sports/racing cars can withstand high loads, pressure and temperature. Thanks to the ring-shaped side electrodes, the spark does not break through, but is supplied to the main electrode.
SZ marked NGK LPG LaserLine are manufactured exclusively for engines that run on gas. The design feature of such products is the presence of platinum inserts on the electrodes, as well as an iridium tip. This makes the candle resistant to elevated temperatures when burning gas. The special coating protects the housing/copper core on the main electrode from overheating.

SZ marking and decoding

NGK elements are individually packaged and are identified by markings on the body. Knowing this makes it much easier to choose a car brand. Let's decipher the marking using a specific example as a basis:

PFR5A - 11

The letter (P) indicates the type of product: D - high reliability, I - spark plug with iridium, L - extended thread, P - platinum soldering, S - product with high reliability platinum, Z - spark plugs with a protruding spark ring located on the skirt. Letter designations are often combined in various combinations.
The letter symbol (F) is a characteristic of the thread and the key required for screwing in/unscrewing.
Symbol (R) – presence/absence of a resistor that suppresses interference.
The digital symbol, in this case 5, is the heat index (2-13, the “hotness” of the candles is determined from high to low - 2 indicates the highest indicator).
Letter symbol (A) - indicates design features;
Number (11) is the value of the gap between the electrodes (7 - 0.7mm, 9 - 0.9mm, 10 - 1.0mm, 11 - 1.1mm, 13 - 1.3mm, 14 -1.4mm, 15 -1.5mm).

NGK spark plug device

Additional parameters of certain features of the SZ can be added to the indicated symbols in the markings. For example: A - product without an o-ring; D – body with anti-corrosion treatment; G – product with additional side copper electrodes; H – special thread and others.

What is important to know about SZ NGK

The original or a fake?

Since products manufactured by NGK are in high demand, many counterfeits have recently appeared on the market . Let's look at how to recognize the original and distinguish it from fakes:

The packaging of the original products has high-quality sizing, the paint does not rub off, and the edges of the slots are neat and evenly cut. Clear markings are easy to read.
High quality ceramics are used as an insulator in original products.
The main electrode is located exactly in the center and has a copper rod. There is no contamination on the spark-producing insulator. The electrode is smooth on the side.
The original has a knurled rather than threaded thread. The presence of jags and irregularities on it indicates a fake.
The nut on the terminal is screwed on very tightly. You can loosen it by applying sufficient force.
The logo on a counterfeit product usually has errors.
A code is applied to the hexagon of the original product.

Original and fake

Service life and cost

The effective operation life of NGK ignition elements may vary and depend on the specific modification. For products in the “regular” version, it is approximately 20 thousand kilometers.

In turn, iridium products will easily ship 80 thousand. The service life is affected by the conditions in which the products are operated, the quality of the working mixture, climatic conditions, etc.

It is necessary to periodically check the condition of the SZ in order to replace them in a timely manner.

When buying NGK products, do not think about saving money, preferring cheaper options. So you can run into a fake that will not last long or with minimal efficiency.

Source: https://tolkavto.ru/remont-i-obsluzhivanie/elektrooborudovanie/kakie-avtomobilnye-svechi-zazhiganiya-luchshe-2.html