Denso spark plug options. Denso spark plugs: the right choice for your car

We bring to your attention the products of one of the largest manufacturers 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.

Iridium candles Denso ignition.

Due to increased attention to environmental situation, to toxicity exhaust gases vehicles are subject to very stringent requirements. 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. Towards 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 central electrode made from iridium alloy. These candles reduce fuel consumption due to good sparking.
• Denso Nickel TT - Nickel spark plugs. This line is different affordable cost, since there are no valuable metals in the composition of 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. Combination of two precious metals creates maximum protection from wear.
• Denso Platinum Longlife - spark plugs made using platinum. Tips of the central electrode are made of this material. Due innovative technology the service life of components increases 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, use 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;
• By technical 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 suitable type iridium spark plugs Denso 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 boosted engine running on high revs.

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 performance increases. harmful emissions in atmosphere.

Most common spark plug failures

Most common cause failure - carbon deposits. 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 air filter, injection system, etc. Problems in the operation of candles due to plaque are due to the fact that carbon deposits become 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.

Operation of the gasoline engine internal combustion A lot depends on the spark plugs. Only a powerful and stable spark can ensure the combustion of the fuel mixture with the release maximum number energy.

In this article, we will look at Denso spark plugs, which are very popular among both motorists and professionals. We will understand their design features, the technologies used in their production, and also discuss the main advantages. The information is based on feedback from car owners.

A few words about Denso

Denso Engineering Company was founded in Japan in 1949. Its main specialization is the manufacture of automotive components: spark plugs and glow plugs, magnetos, generators, starters, engine management systems, scanners, sensors, etc. Thanks to constant scientific and technical activity and its own advanced developments, Denso has become a world leader in the production of electrical appliances. Concerns such as Volvo, Opel, Toyota, Subaru, Citroen complete their cars with parts from this particular company. Subsidiaries Denso are located in Japan, China, Taiwan, Singapore, Canada, USA, Brazil, Great Britain, France, Russia, Turkey, India, UAE, Morocco. The company's products are popular all over the world due to their quality and reliability.

Products of the company "Denso"

Spark plugs are not the main products of the company, but only thanks to them it has gained such fame. The concept for the development and sale of these parts is built in such a way as to provide brand stores and authorized technical stations the best of patented technologies. All Denso spark plugs are manufactured to the highest quality standards and are ISO 9000 and QS 9000 certified.

Range

The company's products include more than six and a half thousand constantly updated positions and are designed for 99% of all cars produced in Europe and Asia. The range of spark plugs includes the following series:

• Standard.
• Platinum (Double Platinum).
• Iridium power.
• Iridium Tough.
• Iridium Racing.
• TwinTip.

Standard candles

The company's most popular product Denso - spark plugs positioned as standard. They are ideal for all-weather use in any gasoline engines, therefore they are considered universal.

Thanks to the U-groove technology developed by experts , spark plug standard type can reduce fuel consumption by up to 5%. At the same time, its effective ignition is ensured, and the amount of harmful impurities in the exhaust gases is also reduced.

Among the distinctive features of standard Denso candles are:

• large resource (50-70 thousand km);
• excellent heat resistance due to nickel plating;
• efficient heat distribution;
• wide range of thermal coefficients.

Denso's standard spark plugs received the largest number positive feedback among owners of cars of the middle class. They are reliable, serve for a long time, and cost a little more than domestic counterparts.

Platinum

The company's unique product Denso - spark plugs Platinum series, characterized by a very long service life. Today, many manufacturers use the technology of coating the central and ground electrodes with a layer of platinum, but for the first time it was applied by Denso. These spark plugs take care of 100 thousand kilometers without any problems. And this is not the limit, but only the declared resource.

But they are not only distinguished by their resource. Thanks to the superconductor coating, they are able to provide easy and stable engine starting even when the voltage drops. battery. Spark plugs from the Platinum series are supplied to the conveyors of most Japanese automakers that produce premium cars.

Iridium power

Iridium is an element of high density and excellent corrosion resistance even at temperatures exceeding 2000 0 C. It is very close to platinum in its properties, although it has a lower cost.

Denso Iridium spark plugs are also known for their wear resistance and durability, although they are much cheaper than their platinum counterparts. They are not inferior either in terms of reliability or resource.

Iridium electrode coating technology is also developed and patented by Denso. The distinctive features of these candles include:

• the thinnest central electrode to date (0.4 mm), excluding misfires;
• a powerful spark that allows the engine to instantly respond to acceleration;
• long service life.

Iridium Tough

Iridium Tough Denso spark plugs are the most successful symbiosis of the two technologies described above. A feature of their design is a double needle-shaped side electrode made of a special platinum alloy. Its thickness is only 0.7 mm. It has a significantly less cooling effect on the spark, due to which, at the moment of ignition, combustible mixture a stable core of flame is formed. The results of testing candles Iridium Tough showed that this technology allows you to:

As for the resource, they are designed for 100 thousand kilometers. They are completely versatile, perfect for both gasoline engines, and for engines running on liquefied gas.

Iridium Racing

Iridium Racing spark plugs are designed by the company specifically for racing cars. They are used for both karts and for the uniqueness of their design lies in the use of an alloy of iridium and rhodium for the central electrode, which provides instant acceleration and almost complete combustion of the fuel mixture in the cylinders. Platinum tips on the side electrodes allow you to get the most stable and powerful spark.

The use of Iridium Racing in conventional cars also allowed, however, the type of engine should be taken into account, because these candles are designed for high-octane gasoline.

TwinTip

Spark plugs "Denso TT" (TwinTip) are designed for those drivers who care about engine stability and fuel economy. They are equipped with nickel center and side electrodes. This technology is also a development of the company. In terms of efficiency, these candles are in no way inferior to the models described above, but they are much cheaper. Their other benefits are:

• absolute universality (suitable for any gasoline engines And power units working on gas);
• a huge range of models, designed for 80% of all European cars;
• stable ignition, powerful spark, so that fuel consumption can be reduced by up to 5-7%;
• easy engine start.

SIP

In 2003, Denso presented super-ignition plugs, produced under the name SIP. Thanks to thin electrode technology, high quality and long term service, they are the most in demand on the conveyors of the largest manufacturers of middle-class cars. The range of these candles is unusually wide. Judge for yourself. There are over 11,000 models for motorcycles and small boat engines alone. What can we say about cars.

Their popularity is due to:

• the possibility of improving the flammability of the fuel mixture with their help;
• reduction of fuel consumption up to 5%;
• increase in the power of the power unit up to 4%;
• a large resource (100 thousand km);
• a huge range of modifications.

Selection of the most suitable model

In order to choose the right spark plugs, you will need to know:

• engine's type;
• type and recommended fuel;
• recommended glow value for candles provided by the manufacturer;
• interelectrode gap;
• diameter of the threaded part of the ignition element, etc.

If you are the owner petrol car middle class, it hardly makes sense to spend money on expensive platinum candles. In this case, models from the Standard series would be ideal. Decide on the glow number and the diameter of the "skirt", and you can safely buy any of the modifications.

Does your car run on LPG? Then pay attention to the Denso K20TT spark plugs. They are suitable for most cars with gas power units. Well, if you are driving sports car, and even participate in races, get Iridium Racing without much hesitation.

In order not to make a mistake with the choice, motorists are advised to buy Denso spark plugs in a company store. So you will be sure that you are offered Japanese original, not a fake from China. In addition, in the store you can get advice on the applicability of a particular model.

The tightening of toxicity standards for car exhaust, the increase in the cost of fuel and the reduction in its consumption, lead to the fact that more and more drivers have to pay Special attention such an important part of the car - the spark plug. Along with the usual ones, more and more motorists began to install Denso companies.
It is believed that iridium candles:

1. They have a longer service life compared to conventional copper ones.
2. Reduce fuel consumption due to more complete combustion of the mixture.
3. Extend the life of the engine and increase its power.

However, when buying candles, you should take into account the fact that, like any part, the denso spark plug is selected according to the car and you should not neglect the manufacturer's recommendations in this case.
In matters of the correct selection of denso candles by car brand, installation features and types of products, we will try to figure it out below.

Denso corporate headquarters

To date, the Denso brand has a wide range of manufactured spare parts and auto components, but the production of spark plugs is a priority for the company. It should also be noted that the production of candles is carried out not only for cars, a recognizable brand can be found on motorcycles, garden equipment, and water boats.

Denso iridium spark plugs have the world's thinnest center electrode with a diameter of just 0.4mm.

The latest developments of the corporation have made it possible to achieve significant results in their products. So Denso iridium candles incorporate the world's thinnest iridium electrode - its diameter is only 0.4 mm, while they have an impressive power reserve, which allows them to be used in the most extreme conditions.
Denso spark plug features
As mentioned above, the application of thin electrode allows the denso iridium spark plug to get a powerful spark at a lower voltage value at its contacts. Another design feature of Denso is the use of a narrowed U-shaped side electrode, which also has a beneficial effect on the formation of a spark and, as a result, complete combustion fuel-air mixture. In addition, quenching resistors are installed in the candle body, designed to protect onboard systems car from radio interference.

The main advantages and disadvantages of using iridium candles

Denso Spark Plug Plasma Discharge

To see a more complete picture of the use of high-tech candles, first of all, it is necessary to understand the positive and negative aspects of installing this product on a car.
The advantages include:

All the benefits of using Denso iridium spark plugs can only be experienced on modern vehicles with high-tech engines.

• Reduced fuel consumption - an average of 7%;
• Reduced toxicity of exhaust gases;
• "Precious" candles are not so demanding on fuel quality;
• Simplified engine start at low temperatures;
• Three times the life of denso iridium plugs compared to conventional ones.

As with any industrial product, along with advantages, there are also disadvantages.
Let's consider the main ones:

• The tangible effect of the use of iridium spark plugs can only be felt on modern cars with high-tech motors;
• The high cost of products. Of course, every car owner, when choosing consumables for his car, is guided by this parameter. For example, the price of a Denso candle today is about 700-800 rubles, and this is already 2800-3200 rubles for a set of 4 pieces, while a set regular candles can be bought for 400 rubles;
• The high cost of the product gives rise to another factor - the presence of fakes on the market.

What's in the range

Denso spark plug range

The company's product range is represented by a wide catalog of Denso candles.
It includes spark plugs series:

• Iridium Power;
• Iridium Tough;
• Iridium TT;
• Iridium Racing.

Candles Denso selection by car

When conducting Maintenance petrol car, along with various filters, technical fluids And belt drive– the spark plug is the same consumable and must be replaced periodically.
For the convenience of selecting Denso candles for a car, there is an online service on the manufacturer's website. When entering the product search page, the buyer faces two paths:

1. You can select a product by the make and model of the vehicle;
2. By marking, specification and item number.

Electronic catalog of the Russian-language website Denso

Marking of Denso spark plugs

The range of manufactured products is very wide, so it is not an easy task for an ordinary car owner to independently select denso spark plugs for a car brand.

Installing hot spark plugs car factory is common practice. "Cold" candles are put on forced engines for normal operation at high speeds.

Along with overall dimensions products, very important parameter for any spark plug, the glow number is considered. Depending on this indicator, candles are "hot" and "cold".
Hot - installed at the factory, when assembling the car and are a kind of standard product.
Cold - the same candles only with a lower heat transfer rate. They are designed to work, as a rule, on uprated engines, at high speeds.
Produce correct selection Denso candles can be used using the table below. detailed information, indicating all existing parameters products, will allow even a novice car owner to carry out full transcript denso spark plugs and make the right choice.

Table of symbols in the marking of Denso spark plugs

What to choose from

To date, of the iridium candles, the products of the two companies Denso and NGK are considered the most popular. Surely every car owner, going into a car shop, will be puzzled by the question - which candles are better than Denso or NGK? It is difficult to answer this question unambiguously, both manufacturers produce excellent products, value the quality of the goods and their reputation.
When conducting comparative tests of candles, authoritative laboratories noted that both brands have the best performance compared to other manufacturers of similar products. Between themselves, Denso and NLC practically do not compete - the difference in performance can be safely attributed to an error measuring instruments, however, some features can still be distinguished:

1. Many automakers install Denso Iridium spark plugs on the assembly line when assembling their cars. On this basis, you can indirectly reduce the likelihood of running into a fake in your car.
2. It is believed that the NGK brand is more famous than Denso, and this is usually the best signal to start producing famous products in clandestine factories.

What is better Denso or NGK? No reliable research has been done on this topic. One thing is clear - you must strictly follow the instructions of the automaker.

1. An important aspect when buying any auto products is the price - denso iridium candles in this regard are slightly cheaper than NGK.
2. On the network, at specialized auto forums, there was information that:
   • Denso candles tend to loosen in its threaded part;
   • For the first 500 km of the way, Denso's spark gap increased.

The last two facts can be confidently attributed to clearly counterfeit products, because today this phenomenon is not uncommon.
Despite all the pros or cons, each car owner chooses for himself which candles are better than nzhk or denso, since it is not easy to determine the clear leader here.

Is the game worth the candle?
If in search engine the world wide web, drive in the words Denso candles reviews or in a conversation with experienced servicemen ask a question about reviews on Denso candles? You can meet both positive and negative experience in the operation of high-tech products.

Without a doubt, high quality and durability are the main criteria by which Denso iridium spark plugs can be characterized. On the one hand, the high price will scare away the average motorist from buying. On the other hand, the high cost of “precious” candles can easily be justified by their threefold resource, compared to conventional and high quality execution. 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.

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

Technologies Denso

In a huge catalog of manufactured under brand Denso spare parts occupy a considerable part. The reason for this is the quality and Full time job product development engineers. 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". Thus, 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 motors 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 the weakest, has to be in contact with the narrow edge of the side electrode, and not with its entire plane.

Curiously, one of Japanese company NGK, uses the same idea, but mirrored: V-groove in spark plugs V line series cut through 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 candles V-line 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, you can also find crookedly welded spark plugs V line).

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 side 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 efficient 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 the increasingly popular in Europe natural gas.
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 the least fancy 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 maximum level forcing. 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 compare with domestic standard), but from the catalog of analogues we can conclude 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, moreover, knowing a number design features 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. Model marking (letter and digital code) on 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 Japanese brand Denso is the first to patent the TwinTip technology used in the TT range with a nickel center electrode with a reduced diameter of 1.5mm. 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 glow rating, instead of a fake or standard SZ, then with normal operation power unit can save five percent 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 internal combustion engine temperature higher on gas. Accordingly, if the engine runs on gas, then fuel mixture will burn at elevated temperatures.
5. Possibility of self-cleaning. Usage modern technologies allows candles to self-clean when 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 for checking appearance, and internal structure devices.

Visual aid - what is the difference Denso originals from forgery

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

1. On fakes, the contact output of the candle has glossy surface, while the originals are 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 on the climbs, as well as when high speeds the power of the power unit begins to decrease.
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.