What do candles do?
As you know, a spark plug supplies a spark to the cylinder to ignite the fuel inside the combustion chamber. The spark plug is exposed to enormous temperatures, which of course does not have a favorable effect on its condition, so neglecting to replace spark plugs is highly discouraged and, if possible, it is advisable to change them before winter for easier starting in cold weather.
A worn-out spark plug can cause a lot of trouble, such as a lot of engine tripping, a number of misfires, loss of power and even an increase in fuel consumption.
In this article you will find the answer to the question of which spark plugs are best suitable for the Lada Niva.
Replacing spark plugs
| Requirements for modern spark plugs What should a candle do? A spark plug has many important tasks: it must ensure combustion, make a reliable cold start possible, and work uninterruptedly throughout its service life. In addition, it must satisfy many precisely defined requirements. Electrical Requirements Breakdown resistance. Modern ignition systems produce high voltages - up to 40,000 volts. They should not lead to breakdowns on the insulator. Breakdown resistance. During the combustion process, fuel and oils produce soot, oil deposits and ash, which are deposited on the electrodes. These particles conduct electricity under certain thermal conditions. However, a short circuit should not occur across the insulator. Mechanical Requirements Pressure resistance. Periodically, high pressure arises in the combustion chamber, which must be compensated in front of the spark plugs, without losing seal. Reliable installation. Ceramics must withstand the tightening forces applied to them during installation. Chemical requirements Flame resistant. The insulator leg protruding into the combustion chamber must withstand heating to red heat, as well as chemical changes occurring in the combustion chamber. Soot resistance. Particles arising in the fuel, which settle on the insulator leg as carbon deposits, should not change the ignition characteristics. Thermal requirements Temperature resistance. The spark plug, heated during operation, is cooled by the sucked-in air-fuel mixture, which is a thermal shock that the insulator must withstand. Thermal conductivity. The spark plug must conduct the received heat well and quickly to the cylinder head. Tact - suction. Gas temperature approx. 100 °C, gas pressure 0.3 - 0.6 Bar Tact - compression. Gas temperature approx. 300-600 °C, gas pressure 8-15 Bar. The mixture shrinks to a small fraction of its former size. Tact is work. Gas temperature approx. 2000-3000 OS, gas pressure 30 - 50 Bar. Ignition voltage approx. 40000 Volts. The mixture ignites. The combustible gas performs mechanical work on the piston Tact - release. Gas temperature approx. 800-1000 °C, gas pressure 1 - 5 Bar. Pushing out unburned hydrocarbon Spark plug electrodes and materials for their execution Connecting electrodes They consist mainly of a nickel alloy with a copper core and show good heat dissipation performance and high corrosion resistance. Silver electrodes Silver has high electrical and thermal conductivity with very high chemical resistance. Titanium electrodes High-tech material has very good thermal conductivity and high corrosion resistance Platinum electrodes The material used as reinforcement shows good resistance to corrosion and burning. Application areas: single platinum (only the central electrode is reinforced) or double platinum (side and central electrodes). Of the 1.3 billion spark plugs supplied annually to the automotive industry, 1/3 are equipped with electrodes made of precious metals. Video |
Spark plug gap on Niva
The gap between the electrodes on the spark plugs is one of the main indicators that directly affects the operation of this engine part. It must be checked every 20-25 thousand km to ensure proper engine operation. The gap can be adjusted if it is out of the normal range or it is better to replace the spark plugs with new ones.
The normal gap on Niva spark plugs is 1.1-1.2 mm.
DIY replacement instructions
To dismantle, first of all you will need a special key for removing the SZ. First you need to remove the ends of the wires from the spark plugs and clean all contacts from dust. The entire spark plug and the area around it must be thoroughly cleaned to prevent debris from getting into the cylinder.
Next, you need to remove the devices with a key and visually diagnose them for damage. You need to inspect both the electrodes and the threads. If there is noticeable darkening on the NW, it’s okay, but if there is no brownish coating, you should be alarmed.
If black plaque is found, it must be removed. It indicates that engine oil has entered the engine cylinder.
When replacing, be sure to check the gap on the new SZ. If it doesn't quite fit, you can carefully bend the electrode on the side. This is a rather risky method, because you need to be as careful as possible and not damage the central electrode. Otherwise, the SZ will fail. After preparing the socket for the SZ, you need to insert it and tighten it with your fingers, and then tighten it with a wrench. Be careful here, otherwise the thread may break.
Niva's original spark plugs
The Niva is supplied from the factory with domestic spark plugs from the Engel plant, which specializes in the production of automotive spark plugs. The plant installs AU17DVRM brand spark plugs; these plugs have proven themselves well and meet all quality standards and service life.
A large number of analogues of these spark plugs have appeared on the market, which are no worse than factory ones, and sometimes even better. Analogues of candles can be both imported and domestic.
Below is a table of spark plugs suitable for a Niva car from well-known brands such as DENSO, BOSCH and Brisk.
The best candles for Niva
Based on reviews from forums, it has been repeatedly revealed that Nivovody gives their preference to NGK candles. These spark plugs are excellent for the Niva engine and can withstand high temperature loads. NGK spark plugs make it easier to start the engine in cold weather and even reduce fuel consumption due to their structure. The closest to standard spark plugs and suitable in design to the Niva engine will be NGK No. 11 spark plugs.
These spark plugs easily overcome the 30,000 km barrier without any damage.
The best manufacturers for Chevrolet Niva
If you are about to replace the spark plugs, then you need to know what to put on the injector of your car. Among all the options currently presented on the automotive market, the leader for the Chevrolet Niva can be considered the Bosch Platinum WR7DPX products, which have a gap of 1.1 mm.
Spark plugs Bosch Platinum WR7DPX
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Due to the fact that they are popular, fakes are very common. When installing low-quality spark plugs on a car, its engine will begin to perform noticeably worse, fuel consumption will increase, and problems with the operation of the power unit will begin to appear. It is better to initially purchase high-quality original parts, since over time it will be quite problematic to detect a fake.
The Japanese DENSO W20TT are also very popular. They have numerous advantages:
- excellent quality;
- presence of a powerful spark;
- stable engine start.
Another great option is NGK spare parts. The main feature of this and the previous version is that they are iridium. The advantage of using them is a longer service life. They do not need to be replaced for 100 thousand kilometers. Also, when installing iridium analogues, the rated power of the power unit increases and the acceleration dynamics increase.
Spark plugs DENSO W20TT
Of course, if spark plugs provide benefits on one engine, they may have a negative effect on another. That is why it is important to select them taking into account the characteristics of a particular vehicle and the recommendations of the vehicle’s operating manual.
The service life of conventional spark plugs ranges from 20 to 30 thousand kilometers. It is very important to replace them regularly and not drive them for more than the allotted time. Otherwise, this may result in negative consequences for the system - lead to failure of high-voltage wires and the ignition coil.
NGK spark plugs
You can find out which spark plugs are better for a Chevrolet Niva using the list below. Speaking about the best manufacturers, we need to mention BOSCH PLATINUM WR7DPX spark plugs with a gap of 1.1 mm. Due to their popularity, they are copied, so you can find many fakes on the market. If you install such an option in a car, engine performance will noticeably decrease and problems will begin. The catch is that the symptoms do not appear immediately, so identifying a fake is not so easy.
Japanese-made DENSO W20TT devices can be considered popular. They have many advantages, which include good quality, a powerful spark, and therefore reliable engine starting. We can say that they do not have any drawbacks, except for one, but quite significant one - the price. To purchase this copy, a car enthusiast will have to fork out a lot, considering the cost of other options. The fact that there is a sea of fakes on the automobile market, perhaps, need not be mentioned.
There is another great option - NGK spark plugs. These spark plugs for Niva Chevrolet injector, like the previous ones, are iridium. The key to the success of iridium SZs is that when purchasing them, you can get rid of thoughts about problems with them for a long time. To install iridium and platinum products, unfortunately, you will have to disassemble half of the engine. In return, they reduce acceleration time and increase the rated power of the engine.
So, to summarize, what is good for one engine may be bad for another.
A little about the manufacturers. I can name several companies that produce spark plugs for Chevrolet Niva and Niva. These are Champion, Eyquem, Beru, Denso, Valeo, NGK. A few words about NGK. I used the products of this manufacturer for a long time until “small” problems began. A new set of spark plugs was installed on the car, and after a couple of thousand, one spark plug would “fly out” and the engines would start to stall.
So I bring candles not only for myself, but also for several diagnostic companies, statistics have appeared, this phenomenon has become common. Without being lazy, I sent several sets to the Moscow representative office. They diplomatically answered me: I’m a fool, the candles are tightened with the wrong tightening torque. Well, they sent it nicely)) Having waited until NGK held a seminar in Russia, I went and laid out everything to the “real Japanese”.
Having made a thousand Japanese apologies, in a private conversation, he said that for the sake of competitive prices, the production of the cheap segment of candles was transferred to other factories. But the percentage of defects is within normal limits and sellers and services need not worry. And if something happens, then send the defect to the representative office for examination. The circle is closed. Since 2011, I began working with products from German manufacturers Bosch and Beru.
You can find out which spark plugs are better for the Niva Chevrolet using the list below. Speaking about the best manufacturers, we need to mention BOSCH PLATINUM WR7DPX spark plugs with a gap of 1.1 mm. Due to their popularity, they are copied, so you can find many fakes on the market. If you install such an option in a car, engine performance will noticeably decrease and problems will begin. The catch is that the symptoms do not appear immediately, so identifying a fake is not so easy.
- BOSCH Platinum;
- NGK;
- DENSO;
- BERU;
- BRISK Super.
