Denso spark plugs are Japanese quality. Selection of Denso spark plugs by brand What does the marking on denso spark plugs mean

Greetings friends! Tell me which of the motorists bothers when choosing spark plugs. For the sake of decency, we asked a couple of questions to the seller and took the first ones that came across, often cheaper. And this is a respected, extremely wrong approach! Today, I will explain to you why! More specifically, we are interested in Denso spark plugs, because they are the world leader in the production of such products. That is, as for the brand, it’s really not worth choosing for a long time, they took the most popular and it’s in the bag! But even in this case, it turns out that there are more than enough nuances in casting a glow plug ...

"Denso" - the best candles in the world!

In 1949, the Denso engineering company was founded on the Japanese islands, which today has its subsidiaries in many countries of the world, of course, there is also a Japanese branch in our country. The concern is the main player in the global auto parts market and I must say it is absolutely deserved! The plant produces not only candles, but brand new generators, scanners, sensors, starters and other components come out of its assembly line.

Of course, due to the high quality and reliability of the products, all the major auto giants of the planet buy parts from the Japanese manufacturer. Subaru, Opel, Toyota, Volvo, Citroen - these and many other corporations have been successfully cooperating with Denso for many years.

Range of spark plugs

Just think, the company's price list includes more than six thousand different positions, isn't it a little, right? This number of manufactured products is designed for 99% of the entire fleet of the Eurasian continent! As for candles, there is also plenty to choose from, let's look at some of the most popular series.

Candles standard

From the name itself it is clear that this is Denso's most popular spark plug. Such a model can be used on any gasoline engines all year round, and therefore is considered universal. The innovative technology of the U-groove, which is used in the production, can significantly reduce the saturation of exhaust gases with harmful impurities, ensure efficient fuel ignition and, most importantly, reduce consumption by as much as 5%!

Having adopted a huge number of reviews, I have identified several clear advantages of the Japanese candlestick over competitors:

• Significantly longer service life, up to 70 thousand km.
• Wide range of thermal coefficients.
• Efficient heat distribution.

In addition, due to the nickel coating, the standard candle has a high level of heat resistance. If you have a mid-range car, the best option would be something like the Denso k20tt! A spark plug of this type, even though it costs a little more than domestic counterparts, but excuse me and its resource is higher!

Platinum line

Denso was the first to cover the central and side electrodes with platinum, so the specialists wanted to increase the service life of the candles. And I must say they did not fail, not only did the declared resource of candles grow to 100 thousand kilometers, but also almost all competitors began to use the technology, is this not a sign of success!

Moreover, candles of this type (for example, here k20pr u11) are able to produce an effective spark even with a significant drop in battery voltage! What cars are they recommended for? According to statistics, Japanese and not only automakers prefer the Platinum line when producing premium cars. Logical, isn't it?

Iridium Power

Iridium is a metal whose characteristics are very similar to platinum. So, it has excellent resistance to corrosion even at critical temperatures (2000 Celsius is not the limit!), while the cost of iridium is an order of magnitude lower than platinum. The technology for coating electrodes with iridium was also developed at Denso. Candles of this group, such as ik20tt4, have a number of positive advantages:

• Wear resistance and therefore durability- no lower than the platinum models, and the price is lower!
• Powerful spark - allows the motor to instantly respond to the position of the accelerator.
• Ultra-thin central electrode with a diameter of only 0.4 mm(there are no analogues at the moment) - eliminates the possibility of interruptions in the operation of the engine.

In addition to those described above, you can find 4 more types of Denso candles on the shelves of a car dealership, and we will briefly consider them.

Iridium Tough

A combination of the previous two lines, equipped with a 0.7 mm needle-shaped ground electrode. Such a candle will reduce the emission of harmful substances from the exhaust, the fuel consumption of your car by 7%, while increasing its power!

Iridium Racing

Produced specifically for sports cars (karts, rally cars, etc.) using a special technology. Its uniqueness lies in the same electrode, this time the central one is made of an alloy of rhodium and iridium, and platinum tips are used for the side electrode.

Note: the use of sports candles on ordinary cars is allowed, but it is imperative to take into account the glow number, because such a product is designed only for high-octane fuel.

Nickel (Twin Tip)

Very similar in characteristics with the standard type, including the cost. Their distinguishing feature is again in the electrodes, which are made of nickel. Surely many of you have heard about the denso k16tt in motoring circles. A spark plug of this type will reduce consumption by up to 7% and make it easier to start the engine, stable glow ignition and a powerful spark of k20tt help in this. Applicability - fully universal fit on 80% of all cars in Europe.

Disadvantages of Denso spark plugs

With the positive characteristics of spark plugs of this brand, I hope everything is clear, I will not repeat myself and immediately move on to the minuses. There are several of them:

1. Valuable - it is somewhat higher than our counterparts, but the difference in quality, as I said, is quite significant.
2. Vulnerability to counterfeit- just a huge number of underground enterprises all over the planet that produce copies of Japanese Denso candles, so you need to be very careful when choosing.
3. Knocked gap - for most new parts, the operating gap will have to be set by the buyer.

If you really want to overpay for good reason, you will have to prepare for the purchase! First of all, it is important to be able to read the markings of candles! Here I will prompt, the decoding is carried out according to the table located above.

How not to buy a fake?

If you are already pretty tired of fakes, you got a misfire in the ignition, you don’t need to look for reasons, everything is clear - marriage! I will give you a couple of tips for high-quality identification of the original!

1. The body, thread and, in general, the candle, are not of high quality, often this can be seen with the naked eye.
2. The surface of the contact output should not be glossy, but matte.
3. The very inscription on the candle on a fake is easily torn off.
4. When using a duplicate, fuel consumption may increase, and traction may decrease.

I am sure you managed to separate the "flies from the cutlets" and right now you are enjoying the virtues of Japanese Denso candles. If this is far from the case, remember, do not get excited, the complete absence of a spark is not at all a sign of a malfunction, it may be required). Hope it was helpful, all the best!

We bring to your attention the products of one of the largest manufacturers of auto parts - Denso. She began to produce spark plugs in 1959 and managed to accumulate considerable practical experience in this area. Thanks to the developments of engineers from Denso, the company managed to create a first-class product at an affordable cost. The high quality of Denso products is confirmed by the fact that these components are used by leading Japanese automakers.

Click to enlarge.

Denso iridium spark plugs.

Due to the increased attention to the environmental situation, very stringent requirements are imposed on the toxicity of vehicle exhaust gases. Vehicle owners have to pay attention to spark plugs due to the regular increase in the cost of fuel, because high-quality components help reduce fuel costs.

Many motorists have switched to installing Denso Iridium spark plugs. In relation to inexpensive models with a copper electrode, these candles have more advantages, including:

1. record operational resource;
2. increase in the fuel combustion coefficient, thereby reducing its costs;
3. increasing engine power and increasing its service life.

Denso spark plug range

• Denso Standard - are spark plugs of the usual design with a U-shaped groove of the ground electrode. Such candles are installed as standard in many cars of the Japanese automobile industry.
• Denso Iridium TT - innovative spark plugs with a maximum replacement interval. According to the manufacturer, they are designed for 120 thousand kilometers. Candles are equipped with thin electrodes that increase the power of the spark.
• Denso Iridium Power - spark plugs with a center electrode made of iridium alloy. These candles reduce fuel consumption due to good sparking.
• Denso Nickel TT - Nickel spark plugs. This line is distinguished by an affordable cost, since there are no valuable metals in the composition of the raw materials. A feature of the model is a very thin central electrode.
• Denso Iridium Tough is a premium line of spark plugs with an iridium electrode with a cross section of 0.4 mm. In the manufacture of the structure, platinum is also used. The combination of two precious metals creates maximum wear protection.
• Denso Platinum Longlife - spark plugs made using platinum. Tips of the central electrode are made of this material. Due to innovative technology, the service life of components is increased to 100 thousand kilometers.
• Denso Iridium Racing - spark plugs for sports models and racing cars. The chance of a misfire during ignition is minimal.
• Denso Glow - classic type auto candles. They have reduced heating time and increased productivity.

Selection of Denso spark plugs by car brand

To search for Denso spark plugs, using the catalog is not the best choice, use the special online services that are available on the websites of the manufacturer and sellers. Selection can be done in two ways:

• by make and model of car;
• according to specifications and number.

Selection example:

Spark plugs Denso - selection by car

Catalogs and certificates

Certificate of Conformity for Denso spark plugs

Application

Application

Application

Application

Marking of Denso spark plugs

The product line of this brand is very extensive, so it is not always possible to choose the right type of Denso iridium spark plugs without the help of a consultant. When selecting, the individual overall dimensions of the auto candle, as well as its glow number, are taken into account. Denso spark plugs are divided into two groups: hot and cold.

Deciphering the marking of Denso spark plugs. In the factory, the machines are equipped with hot plugs, which are standard. As for cold auto candles, this name is due to reduced heat transfer. They are installed on a car with a forced engine running at high speeds.

Conclusion about Denso iridium spark plugs

Iridium spark plugs Denso are characterized by excellent quality and long service life. The only drawback of the product is the price, which will seem high to most car owners. On the other hand, the costs are fully justified, because the working life of iridium candles is 3 times higher than that of ordinary ones. Only an experienced mechanic or driver of an expensive foreign car with a high-tech engine will be able to truly appreciate their benefits and effect.

Spark plug malfunctions and their causes

With high-quality work of candles, sparking should occur at the right time for this. If this process occurs prematurely or too late, engine performance deteriorates, fuel consumption increases and harmful emissions into the atmosphere increase.

Most common spark plug failures

The most common cause of failure is carbon contamination. Another common failure is the wear of the electrodes, which leads to misfires during sparking. The service life of candles determines not only their quality, but also the condition of the engine.

If a thick layer of plaque from the products of combustion of the fuel mixture quickly appears on the surface of the working elements of the spark plug, it is necessary to diagnose the internal combustion engine and eliminate the malfunction causing pollution. Checks require an air filter, injection system, etc. Problems in the operation of candles due to plaque are due to the fact that soot becomes a conductor of electricity, causing spark instability. If the working elements of the candle are covered with soot with a greasy film, you need to check and adjust the oil level.

In injection and carburetor gasoline engines, the spark to ignite the fuel mixture is supplied through the spark plug. At first glance, it seems that there are no special requirements for such a part, however, when visiting a specialized store, a motorist will see a wide range of spark plugs that differ from each other in different parameters.

SZ features

Spark plugs sold in automotive stores differ in various ways:

• Manufacturer - Bosch, NGK, Brisk and others.
• Design - single or multi-electrode.
• Heat number.
• Spark gap.
• The metal from which the electrodes are made is a copper alloy, platinum, iridium.
• Connecting dimensions - the size of the threaded part, the thread pitch, the size of the turnkey hexagon.

In a word, without special knowledge it is very difficult to choose spark plugs. Spark plug markings and interchangeability tables can help in this matter. For example, the VAZ-2105 produces domestic A17DV spark plugs, which correspond to spark plugs from other manufacturers: L15Y from Brisk, BP6ES from NGK, W7DC from Bosch and 64 from Autolite. In fact, the same candle is labeled differently by different manufacturers. What does the marking on spark plugs mean and how to understand it - we will tell below.

Spark plugs of Russian brands

The marking of spark plugs produced by domestic manufacturers is regulated by the OST 37.003.081 standard. Deciphering the marking of spark plugs is carried out by separate letters and numbers. For example, the thread of the body is indicated by the first letter. M14 x 1.25 is hidden under the letter A - the standard size characteristic of a conventional spark plug. Marking candles in the form of the letter M implies a threaded size of M18 x 1.5 - the threaded part of such a candle is larger and fits a 27 wrench.

Immediately after the letters there is a number indicating the glow number: the smaller it is, the higher temperatures a spark is knocked out. The index of the glow number of candles produced in Russia varies from 8 to 26. The most common are 11, 14 and 17 spark plugs. The marking of spark plugs according to their calorific value divides them into cold and hot. The first are installed on highly accelerated engines.

Below is an example of what spark plug markings can be and how to decipher them. Candles A17DV:

• classical carving;
• 17 - glow number;
• the size of the threaded part D - 9 millimeters; if this parameter is less, then the letter is simply not indicated;
• the letter B usually denotes the thermal cone of a protruding type insulator.

The presence of the letter P in the marking - A17DVR - means that there is a noise suppression resistor in the central electrode. The letter M in the marking indicates the use of heat-resistant copper material to create the shell of the central electrode.

In the case of the designation AU17DVRM, the letter U stands for an increased size of the hexagon - 16 instead of the standard 14 millimeters. With a larger turnkey hexagon size - 19 millimeters - the letter M is indicated: AM17B.

Marking candles of foreign brands

Spark plugs of foreign manufacturers are marked according to the same principle as domestic ones, however, other letters and numbers are used for designation. In this regard, motorists may be confused in the parameters of spare parts. To avoid this, the packages usually indicate which specific car the selected spark plugs are suitable for. The marking of candles is also often indicated in special interchangeability tables.

NGK

The Japanese company NGK is the world leader in the production of spark plugs. Its products are considered one of the highest quality and most reliable. NGK spark plug markings are as follows:

• Russian A11 corresponds to B4H.
• A17DVR can be replaced by BPR6ES.

Deciphering the marking of NGK spark plugs is simple:

• В4Н - diameter and thread pitch. The letter B corresponds to M14 x 1.25, other sizes are indicated by the letters A, C, D, J.
• Under 4 lies the heat number. This characteristic is indicated by numbers from 2 to 11.
• The size of the threaded part is 12.7 millimeters, designated H.

Marking candles BPR6ES stands for: standard thread, P - projection type insulator, R - resistor, glow number - 6, length of the threaded element - E - 17.5 millimeters, spark plug features are hidden under S. If a number is indicated after marking with a hyphen, it indicates the gap between the electrodes.

Bosch

Bosch spark plugs are labeled in a similar way. For example, the WR7DC marking stands for:

• W - standard thread 14;
• R - anti-interference resistor;
• 7 - glow number;
• D - the size of the threaded part, equal to 19 millimeters;
• C - the electrode is made of a copper alloy (O - standard alloy, S - silver, P - platinum).

Bosch candles marked WR7DC, in fact, can replace domestic A17DVR candles, which are installed in the engines of VAZ cars of various models.

Brisk

Czech company - manufacturer of spark plugs. Was founded in 1935; its products are very popular among Russian motorists.

Marking of candles is carried out as follows.

• D - standard thread 1.25 mm, designed for 14 keys, body size - 19 mm.
• О - a special design of the candle, made in accordance with ISO standards.
• R - a resistor is used, while the designation X is the resistance of the electrodes to the formation of waste.
• 15 - glow number. It varies from 8 to 19, while the 13 index is not used by the Czechs - a superstitious manufacturer.
• Y - remote spark gap.
• C - copper core of the electrode.
• 1 - the distance between the electrodes, equal to 1 millimeter.

beru

German premium brand owned by Federal Mogul. The main activity of the company is the production of various spare parts and their subsequent sale in secondary markets.

Spark plugs of this brand are marked in the following format: 14R-7DU. Decryption is carried out as follows:

• 14 - candle thread 14 x 1.25 millimeters.
• R - built-in resistor.
• 7 - glow number. Indicated by numbers from 7 to 13.
• D - threaded part 19 mm long, there is a cone seal.
• U - electrode made of copper and nickel alloy.

In the case of a different marking - 14F-7DTUO - the designations change somewhat: the dimensions of the spark plug are standard, while the nut is smaller than the seat (F), it is used only in low-power engines with a sealing ring (T), the central electrode of the spark plug is reinforced - O.

Denso

Marking Denso spark plugs, for example SK16PR-A11, begins with the size of the part and the length of the threaded part. The numbers indicate the glow number, after which information is given about the electrodes and the features of the candle itself. The letters may vary depending on the Denso series.

Full decoding of the given marking:

• S - the central electrode is made of iridium alloy, diameter - 0.7 mm, there is a platinum overlay on the side electrode.
• K - the size of the hexagon and thread.
• 16 - glow number.
• P - the spark plug electrode protrudes 1.5 mm.
• R - built-in resistor.
• A - a characteristic for such a model of candles.
• 11 - the size of the gap between the electrodes.

Champion

Candles of this manufacturer are signed in almost the same way as any other. For example, marking RN9BYC4 means:

• R - installed resistor, if E is indicated, then there is a screen, O - wire resistor.
• N - standard thread 10 mm long.
• 9 - glow number, numbered from 1 to 25.
• BYC - copper core and two side electrodes. The standard design is indicated by the letter A.
• 4 - distance between electrodes.

Varieties of spark plugs

Standard spark plugs are two-electrode: their design consists of a side and a center electrode. To date, such candles are the most common and most often installed on domestic cars. Many manufacturers offer multi-electrode devices that differ in the number of side contacts. The service life of multi-electrode spark plugs is much longer than two-electrode ones, and does not depend on the glow number. It is extremely rare to find torch and pre-chamber spark plugs - they are not very popular and are not suitable for all engines.

Lifetime

The specific type of spark plugs and their brand have a huge impact on their service life. Nickel spark plugs, for example, are designed for an average life of 30-45 thousand kilometers of a car. Platinum analogues work many times longer - they are able to last both 70 and 80 thousand kilometers.

Candles with an iridium electrode vary depending on the thickness of the electrodes and their design, their "life" can be either 69 or 120 thousand kilometers. On platinum and iridium electrodes, carbon deposits are practically not formed, due to which the combustible mixture ignites many times better. The resistance of spark plugs does not depend on what specific metal is used in their production.

The Japanese Denso Corporation is one of the world's largest players in the automotive aftermarket, operating as an OEM supplier for automotive assembly lines and as an aftermarket manufacturer of spare parts, from to high pressure pumps. The company began in 1953 a close collaboration with Bosch, spreading its branches to 22 countries around the world.

Technologies Denso

In the huge catalog of spare parts manufactured under the Denso brand, a considerable part is occupied. The reason for this is the quality and constant work of engineers who improve products. It was Denso who introduced innovative iridium plugs capable of creating a powerful and stable spark in harsh conditions, while maintaining a huge resource by the standards of traditional spark plugs.

More also has its own "highlights". So, the U-shaped groove in the side electrode, patented by the company 30 years ago, serves as a spark stabilizer - a decrease in the electrode area as close as possible to the central one increases the electrostatic field strength between them, and the breakdown of the spark gap occurs at a lower voltage. A spark occurs at the edges of the electrodes, in a better ventilated space, which reduces the effect of aerodynamics on ignition stability - it would seem that these are trifles, but on modern engines running on lean mixtures, even this can significantly affect the operation of the motor. The heat loss at the moment of the flash also decreases - the flame front at the moment of occurrence, when it is weakest, has to be in contact with the narrow edge of the side electrode, and not with its entire plane.

It is curious that one of them, the Japanese company NGK, applies the same idea, but mirrored: a V-shaped groove in the V-line series plugs is cut into the center electrode. It is clear that this was done to comply with copyright, but as a result, NGK loses: if the side electrode with a groove can be welded to an arbitrary place relative to the central one, then for V-line candles it is necessary to accurately position the side electrode relative to the groove in the central one so that they are parallel. Hence the complication of production, an increase in the percentage of defects (moreover, crookedly welded NGK V-line candles can also be found on sale).

Video: Denso ik20TT iridium spark plug

Denso iridium spark plugs

The creation of iridium spark plugs made them the "face" of the company. The Denso range now includes several series:

1. OEM spark plugs supplied to automotive plants have an unconventionally thick (0.7 mm) iridium center electrode and a platinum-coated ground electrode. This is done to ensure compliance with the declared resource of 120 thousand kilometers, although it reduces work efficiency (the thickness of the electrode affects).
2. Iridium Power - candles with an ultra-thin (0.4 mm) central electrode, and a U-shaped groove is made in the side electrode. For a long time, these plugs were the most effective in the Denso Iridium line, until they were supplemented by new series.
3. Iridium Tough candles are a hybrid of the two previous ones: a thin central electrode is combined with a platinum-plated side electrode. These candles are close in resource to OEM candles, but work much better on natural gas, which is gaining popularity in Europe.
4. SIP plugs are a miniature masterpiece of technology: opposite the central iridium electrode, an equally thin platinum pin is soldered to the side electrode. This gives perfect spark stabilization, ease of ignition at high rpm and powerful boost. SIP plugs are Denso's most economical spark plugs, and you can feel the effect even on a less-than-sophisticated engine. The development of SIP technology has become Iridium TT candles, which still have no analogues among competitors.
5. Iridium Racing are designed for ultra-tough operation in engines of the maximum boost level. They do not have a side electrode at all - the spark hits right at the edges of the skirt. There is no side electrode - there is no risk of its overheating, leading to detonation, for highly accelerated motors, fatal.

In the age-old confrontation with NGK, it is iridium spark plugs that bring Denso leadership - holding 55% of the iridium spark plug market in general, in the field of SIP spark plugs Denso is actually a market monopolist (90%).

Marking candles Denso

Video: Candles in Japanese cars: Denso, NGK candle marking

Each manufacturer uses its own coding scheme for candle parameters. Denso has adopted the following for new series:

For Iridium TT candles, the scheme is different:

Old marking system:

For example, let's find an analogue of our classic candle A17DVRM. Here the difficulty is only (Denso does not provide a comparison with the domestic standard), but from the catalog of analogues it can be concluded that Denso will become the analogue of the Russian "17" "20". Since we need a 14x19 threaded shank, and the candle key used is 21, we need to look for candles with a prefix W20 in the "old" series (since VAZ candles have been exchanged for more than a dozen years) - for example, W20EPR-U, candles with a 19 mm shank ( E), protrusion of the central electrode ( R), built-in resistor ( R) and a U-groove on the side ( U). If there is a desire to put iridium candles, then IW20TT will do.

Comparison with competitors

Strict quality control and positioning in the world market in leading positions make it possible to consider Denso spark plugs as one of the favorites when choosing a new kit - indeed, in most cases, in terms of price / quality ratio, they will beat their counterparts. If the car initially uses iridium candles, especially with a rare shank size (for example, 10x19), then in fact the choice remains only between Denso and NGK. In this case, sympathy can also be on the side of Denso, as their range allows you to choose a more suitable type of candle - long-lived Iridium Tough, high-performance Iridium TT or Iridium Racing, if you plan to squeeze everything that it is capable of out of the engine.

The main advantage of Denso is a relatively low percentage of fakes, which distinguishes them favorably from NGK, which have become almost synonymous with counterfeit goods (it is enough to fill in a spark plug on the same Ebay to see a huge number of offers “NGK type” at penny prices from China).

How to distinguish a fake?

Unfortunately, counterfeit products are also found under the Denso brand, and, knowing a number of design features of the original candles, it can be easily distinguished:

1. The contact cap must be smooth, nickel-plated. On fake candles, it is rougher, sometimes oxidized (black coating)
2. The logo print on the insulator is applied either with small dots or with solid paint, but always neat (no distortions, smeared paint)
3. Soldering on the side electrode opposite the central one is clearly different in color
4. The sealing washer is firmly in place, cannot be moved up and down
5. The model marking (alphabetic and numeric code) on the already printed cardboard packages of each candle is applied with separate stamps in different parts of the conveyor, therefore it always has an offset relative to each other. In clandestine productions, the packaging is printed in its entirety at once, on all boxes from the set it is the same in location.
6. On single-electrode spark plugs, the side electrode is always precisely oriented along the central one.

(SZ) are an integral element of the ignition system of any car. Accordingly, if you want them to last for a long time, the choice of these components must be approached with all responsibility. In this article, we will talk about what Denso spark plugs are, what features they have and how the selection is made by car.

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SZ features

So, if you decide to purchase Denso ik20, k20tt, w20tt, k16tt, then before you make a selection for your car, we recommend that you familiarize yourself with the features of the product. It should be noted that the Japanese brand Denso is the first to patent the TwinTip technology used in the TT line with a central nickel electrode with a reduced diameter of 1.5 mm. In addition, the size of the ground electrode was also reduced to a diameter of 1.5 mm.

So, let's move on to the features that the original iridium spark plugs Denso ik20, k20tt, w20tt, k16tt and others with different glow ratings have, unlike fakes:

1. SZ models ik20, k20tt, w20tt, k16tt and others with improved sparking actually achieve the maximum efficiency of iridium candles. However, the production of such SPs takes less money, since they do not use precious materials.
2. According to the manufacturer, the SZ ik20, k20tt, w20tt, k16tt and other models are characterized by improved performance at significantly lower costs.
3. Nickel TT devices ik20, k20tt, w20tt, k16tt and others require less voltage to start the power unit. Accordingly, the engine can be started much faster even at the lowest temperatures.
4. As a result, the models ik20, k20tt, w20tt, k16tt and others have a thin central electrode with a diameter of 1.5 mm (standard - 2.5 mm). Accordingly, the resulting spark is more powerful, the efficiency of its work is higher. And this, you see, is very important, especially at low temperatures.

Range

The Denso range includes many products with different heat ratings.

We are talking about both iridium and platinum, as well as nickel SZ:

• Nickel (Nickel) TT;
• Iridium TT;
• Standard;
• Platinum Longlife;
• Iridium Power;
• iridium racing;
• Iridium Tauf.

Advantages and disadvantages

Below are the main advantages and disadvantages of iridium and nickel SZ models ik20, k20tt, w20tt, k16tt and others with excellent heat rating. The information below is based on official data as well as consumer reviews.

Advantages that will allow you to make a choice:

1. Reducing the level of emissions into the atmosphere. As a result of the improved sparking in ik20, k20tt, w20tt, k16tt and other models, the combustion process itself is more stable. Accordingly, the operation of SZ ik20, k20tt, w20tt, k16tt and other options can reduce fuel consumption, as well as reduce CO and CH emissions into the atmosphere.
2. Due to the improved sparking of CZ with a good glow number, the ignition index is improved. As a result, candles ik20, k20tt, w20tt, k16tt and others from the Denso brand allow you to ignite even the most lean combustible mixtures. Accordingly, misfiring in the system will occur much less frequently when compared with other SZ or fakes.
3. If you choose originals with an excellent heat value, instead of a fake or standard SZ, then during normal operation of the sludge unit, you can save five percent on fuel consumption - gasoline, diesel or natural gas.
4. If your car runs on natural gas, then Iridium candles with a high glow number of the Tauf (Tough) line will suit you. Such SZ are equipped with an additional platinum tip on the side electrode. In addition, they are characterized by high wear resistance, which is especially important for power units operating on gas. It should be remembered that the temperature of the internal combustion engine on gas is higher. Accordingly, if the engine runs on gas, then the fuel mixture will burn at elevated temperatures.
5. Possibility of self-cleaning. The use of modern technologies allows candles to be cleaned on their own during long-term operation, so the problem of soot is no longer terrible (the author of the video is Hands in Oil).

Flaws:

1. Lots of fakes. In fakes, the glow number differs from the original. Accordingly, the owner of a car running on any fuel, including gas, will not be able to experience all the benefits of a Denso product.
2. If the product itself is not original, its service life will be lower. However, car owners of cars running on diesel and gas periodically write in reviews that the service life of the originals is less than stated.
3. High price. But in most cases, this is due to high quality.
4. On some new SZs, the gap was not initially set to work. This is confirmed by the reviews of motorists.

Marking

If you want to make the right selection of iridium candles for your car, it will be useful for you to familiarize yourself with the marking and decoding of the symbols, which are given in the table below:

Marking and interpretation of the designations of Denso spark plugs

How to distinguish the original Denso from a fake?

So, in order to purchase original SZ for your car, you need to know exactly how not to fall for a fake. There is a method of checking in appearance, as well as the internal structure of the device.

A visual aid - what is the difference between Denso originals and fakes

Of course, when buying, you will make a visual inspection:

1. On fakes, the contact terminal of the candle has a glossy surface, while on the originals it is more matte.
2. Unlike originals, Denso branded print on fakes can be easily scraped off. It is very difficult to erase this text on the original.
3. As for the case itself, on fakes it is made of less quality, in particular, we are talking about a low level of surface treatment.
4. The quality of threading, as well as the electrode itself, is lower in fake SZ, this can be seen with the naked eye.
5. When using a fake, you will notice how the power of the power unit begins to decrease on climbs, as well as at high speeds.
6. Fuel consumption can be increased, this must be monitored.
7. Over time, the side electrode SZ will begin to melt, periodic diagnostics will help to understand this.