Lada Largus: replacing spark plugs in a 16-valve engine

Updated: 09.22.2021 15:05:57

Expert: Boris Evgenievich Kononov

*Review of the best according to the editors of expertology.ru. About the selection criteria. This material is subjective in nature, does not constitute advertising and does not serve as a purchase guide. Before purchasing, consultation with a specialist is required.

Often Lada Largus owners encounter problems when the engine stalls or misfires. First of all, you need to pay attention to the spark plugs. During the operation of the vehicle, they wear out and lose their original technical characteristics. Different configurations of the Lada Largus differ not only in options and functions, but also in power units, so each variation has an individual spark plug arrangement. When choosing, you need to take into account several important features and also avoid fakes. We tested various spark plug models and compiled a list of the most affordable, durable and effective options.

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...and take it out of the spark plug well.
...and take it out of the spark plug well.

Install the new spark plug in the reverse order.

When screwing in a spark plug, it is necessary to rotate the spark plug wrench or extension with the head by hand, and not with a wrench or ratchet, to avoid damaging the threads of the spark plug hole in the cylinder head.

If the spark plug does not follow the thread, strong resistance to rotation will be felt. In this case, it is necessary to completely unscrew the spark plug and, after cleaning the threads, re-tighten it. Finally tighten the spark plug to a torque of 25–30 Nm.

Attention! Over-tightening the spark plugs can damage the threads in the spark plug holes in the cylinder head.

We replace the remaining spark plugs in the same way.

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Lada Largus: replacing spark plugs in a 16-valve engine

Top 5. BERU Z16

Rating (2021): 4.15

Optimal combination of price and quality Candles work flawlessly in severe frost, are affordable and have a good service life. The balance between price and quality is obvious.

• Characteristics

  Average price: 192 rub.

• Country: Germany
• Center electrode material: nickel
• Heat number: 7
• Gap, mm: 1.1
• Resource, km: 30000

Owners of Lada Largus 1.6 choose spark plugs from the German brand BERU for their high-quality assembly and availability. The car accepts them with gratitude: the engine starts with half a turn, runs smoothly and is more fuel efficient. The spark plugs effectively “light” for the entire guaranteed 30,000 km. But, judging by the reviews, few people last longer. Some Largus owners prefer to change them after about 20,000-25,000 km for fear of not starting in the cold. At the same time, there are practically no complaints about earlier failure of spark plugs. In general, a good option for a budget 8-valve model.

Advantages and disadvantages

• Effective in any weather
• Economical
• High quality assembled

• Rarely work after 30,000 km

Rating of the best spark plugs for cars with LPG in 3 price categories

Modern gasoline engines have improved characteristics when compared with engines of previous years.

But not everyone can afford a new car with a highly efficient engine. But the problem with high fuel consumption needs to be solved somehow.

Brisk LR15YSOne of the most popular solutions on the Russian market is the installation of gas equipment.

Switching to gas or blue fuel does not require huge financial investments. At the same time, the car begins to require less money for direct refueling.

The trend of rising gasoline prices forces us to look for alternatives. But for LPG to work effectively, you must initially purchase good equipment, one of the key components of which is a spark plug.

You should find out which candles are the most popular and effective

To do this, a small rating will be presented, divided into 3 price categories. Before discussing the question of which candles will be better for gas, depending on the financial capabilities of the consumer, you need to understand an equally important dispute. Specialists who install gas equipment on cars that were initially equipped with gasoline power plants are recommended to replace traditional spark plugs with special ones designed specifically for working with blue fuel. But many motorists and car enthusiasts do not understand why switch from existing spark plugs to some special ones, supposedly designed specifically for igniting gas. They are sure that this is just a clever marketing ploy, and there is no real difference between the devices. It is important to note that traditional spark plugs are designed to work to ensure the combustion of the air-fuel mixture, that is, a combination of fuel vapor and oxygen (air)

Spark plugs for gas engines: what to consider when choosing

Let's start with the fact that recently, against the backdrop of constantly rising prices for gasoline and diesel fuel, a car with a gasoline engine has truly become a mass phenomenon.

This option allows you to get the maximum benefit, since switching a gasoline car to cheaper gas makes it possible to significantly reduce fuel costs. It should also be added that even taking into account their high efficiency, they are more expensive than gasoline ones, and are also not without a number of their own problems. As for electric cars, such cars are still in the minority.

It turns out that in fact the only available alternative is the ability to convert the car to run on gas. At the same time, not all motorists, after installing LPG, take into account a number of features and nuances that arise after changing the type of fuel.

In other words, in order for the engine to operate normally on gas, and also to prevent reduction, it is necessary not only to correctly install and configure the gas system, but also to replace some elements and working fluids. More precisely, we are talking about, as well as about. If everything is more or less clear with engine oil, then difficulties may arise with candles.

Next we will talk about why to change spark plugs for gas equipment, as well as what needs to be taken into account and how to choose the right spark plugs for a gas engine.

As a rule, after installing gas equipment on a car, qualified specialists separately recommend immediately replacing the spark plugs. To replace, you should use special spark plugs for gas engines, which are slightly different from conventional ones. The need for such a replacement is dictated by the fact that ordinary candles are designed to ignite a mixture that consists of gasoline and air.

Conventionally, this mixture is more “dense”. At the same time, during the combustion of this mixture, a certain temperature arises.

If we talk about gas, the main differences are that the mixture of air and gas fuel has higher electrical resistance, as well as higher temperatures during combustion.

It turns out if you use ordinary

Selecting spark plugs for a car with gas equipment. What is the difference between gas and gasoline

After converting a vehicle to gas fuel (most often this is an installation), manufacturers of ignition systems recommend installing spark plugs for gas fuel on the car engine, designed specifically for operation on “CNG” and “LPG” (methane/propane). And indeed, some time after installing gas equipment, car owners notice a decrease in the life of spark plugs, coils, and high-voltage wires. In this article, we will understand the difference between spark plugs for gas and gasoline.

Should I install gas spark plugs, or should I limit myself to adjusting the gaps of standard parts? The main task of the vehicle ignition system is to ensure high-quality spark formation in all operating modes of the internal combustion engine.

Unlike gasoline, the combustion of a high-octane gas-air mixture in the combustion chamber of an engine occurs at an increased temperature and combustion time, and effective operation of the spark plug is possible only in a certain temperature range. In addition, a gas mixture (methane or propane) is more difficult to ignite; its ignition requires a more powerful spark, which causes an increased load on the car. To meet these conditions, the developers adapted the spark plugs specifically for operation on gas, where design solutions were applied:

• reducing the diameter of the central electrode;
• reducing the gap between the electrodes (the distance between the side and central electrodes);
• the use of materials for the manufacture of electrodes that can withstand temperature loads (platinum, silver, yttrium, iridium).

The listed parameters are already taken into account in expensive gasoline spark plugs, where the electrodes are also soldered with precious metals. They differ from gas ones only in the gap. Often after installing gas equipment on a car, the internal combustion engine begins to throttle, failures appear and gas consumption is higher than expected.

These phenomena can occur for various reasons, one of the options is misfires due to an increased gap in the standard spark plugs, due to burning of the electrodes when operating on gasoline.

Spark plugs: the cure for difficulties and instability

The combustion of the fuel-air mixture in the cylinders is the main process for the engine, the quality of which directly affects the stability and dynamics of the car, the life of the engine and catalyst. In gasoline engines, the air-fuel mixture is ignited by an electric spark produced by spark plugs. At the same time, initially high-quality ignition of the mixture is largely the key to efficient engine operation.

Obvious and probable

Meanwhile, the spark that the spark plugs produce can be different in strength - temperature and volume, respectively, igniting the fuel mixture differently (or not igniting at all). The best and strongest is a large and bright white-blue spark, a weaker blue spark, and the worst is a small yellow-red spark, which may even turn out to be “ineffective,” especially in cold weather.

The cause of a “weak” spark (with all the ensuing engine problems) can be either the spark plugs themselves, which were initially of poor quality or contaminated, have exhausted their service life, or malfunctions in the engine ignition system. Due to corrosion and poor contact, microbreakdowns occur in high-voltage wires and coils, the voltage leaks and is not enough to form a spark of sufficient power. There may also be other reasons - malfunctions in the low-voltage circuit and generator.

Age and fuel problems

Almost all cars with mileage older than 5 years experience similar problems to one degree or another. Therefore, it often happens that even after replacing the spark plugs, the ignition quality does not improve or improves only slightly, but the engine continues to fail and start poorly. All “sores” are especially acute during frosts, when the volatility of gasoline is reduced and the fuel mixture ignites much worse, requiring a more powerful spark for ignition than in the warm season.

What spark plugs are installed on Largus

A note about what spark plugs are installed on the 8-valve Largus from the factory; what spark plugs the manufacturer recommends; where you can buy original spark plugs at an affordable price.

The first 15 thousand on my Gus are long gone. And this is the mileage at which the car undergoes its first maintenance. At the same time, one of the mandatory service work was the replacement of spark plugs. The procedure is not complicated and took me no more than 20 minutes.

But before that the question arose: “What replacement candles should I buy?” Having opened the hood and unscrewing one of the spark plugs, I found out that my 8 valve valve has two-pin spark plugs Eyquem (RFC58LZ2E), made in France. The gap between the electrodes is 0.95 mm (± 0.05 mm). The country of manufacture “Made in France” is indicated on the case.

Here is a photo of one of them:

Where can I buy?

One of the large Moscow online stores, from whose catalog I select spare parts for Largus, gave me the following information on candles:

• Article 224013682R — spark plug for 8 cells Lada Largus (7700500168), 2 electrodes, Romania, original
• Article 224018651R — spark plug for 16 cl Lada Largus (replacement 7700500155), 1 electrode, France, original

I ordered according to the first article, i.e. 224013682R. The purchased candles corresponded to the original ones, with the only difference being that the country of manufacture was Russia. Information about this is indicated on the packaging. On the body of the spark plug itself are indicated: letter markings of the Renault company, alphanumeric code. Country not specified.

This is what the packaging of domestic candles 224013682R looks like:

And here is the candle itself:

I installed these spark plugs after the first maintenance. I also continue to use them at every scheduled replacement. There are already four technical inspections under my belt. The mileage has exceeded 60 thousand. The flight is normal.

The only question I have left is, what kind of spark plugs come under article number 7700500168 (7700500155)? Maybe just the original French ones? I'll try to buy one of these someday and find out what kind of animal it is.

I found this out the next time I replaced the spark plugs. 7700500168 are two-pin Made in France. Bought at a price of 179 rubles. a piece. Set of four pieces—RUB 719.

Factory recommendations

If we contact the manufacturer directly, he redirects us to the operating manual and service book of the car, where not a word is said about spark plugs. To top it off, he sends it to the dealer.

If you look at the Largus manual, then for the K7J and K7M engines Champion RYCLC87 and SAGEM RFN58LZ spark plugs are recommended, and without division into 8-cl and 16-cl.

Analogs offered by online stores

Analogues for 8 cells

• 6962 NGK - from 120 rub.
• 8671004070 Motrio (Renault) - from 170 rub.
• 242235668 — Bosch 190 rub.
• OE026T10 Champion - from 200 rub.
• K20TXR Denso — 290 rub.
• 30530 Asam — 400 rub.

Analogues for 16 cells

• 8671004086 Motrio (Renault) from 160 rub.
• OE033T10 Champion
• 242235666 Bosch from 140 rub.

Happy shopping everyone!

Replacement Spark Plugs Largus 16 Valves

Practical advice on choosing and replacing spark plugs in Lada Largus

When the car is located over a long distance, its owner must ensure timely replacement of consumables. Namely, high-quality spark plugs in Largus will ensure uninterrupted operation and relative stability of this Russian car.

Spark plugs play an important role in the engine of any car.

Failure of these parts threatens the failure of other components of the entire ignition system: distributor caps, coils, gas converter. In fact, the spark plug represents the components closest to the working processes of the cylinders of the entire engine. In addition, the current condition of these parts can indicate the temperature under the hood, the quality of the fuel used and the composition of the combustible mixture.

Spark plug diagnostics

The time has come to identify the shortcomings that provoke precarious work. Of course, this is not the only reason for this, since the engine also includes other elements: the ignition system, voltage dividers and various sensors.

In this situation, not only the correct diagnosis is useful. Even a color analysis of the insulator of the working part of a candle can tell a lot of fun. If it is grayish or yellowish-brown, it means the engine is running normally. When darkness is observed down to darkness, deposits appear indicating a very cold heat spectrum or a decrease in vacuum.

A wet finish indicates a damaged head gasket or wear on the pull-out ring. Almost everything depends on the composition of the sediment, the determination of which can prevent a drop in the running ability of the Lada Largus.

Key signs of ineffectiveness

• formation of different deposits;
• erosive phenomena;
• scattering, splitting or destruction of the insulator;
• excessive fuel consumption;
• burning or difficulty starting the engine.

There are still many problems that indicate that the spark plugs for Lada Largus simply need to be replaced. They often monitor their condition to eliminate most of it immediately.

Replacing spark plugs on LADA Largus

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Top 4. CHAMPION OE063T10

Rating (2021): 4.25

Reliable and efficient Inexpensive spark plugs with performance characteristics that guarantee reliable operation of the Largus engine and fuel economy.

• Characteristics

  Average price: 223 rub.

• Country: Italy
• Center electrode material: nickel
• Heat number: 10
• Gap, mm: 1.0
• Resource, km: 30000

Like other representatives of our rating, these spark plugs work flawlessly in both summer and winter. Some cars leave the assembly line with them and consistently drive 30,000 km before the planned replacement. Owners of Lada Largus notice that the new spark plugs start the engine perfectly, which even idles without failure. Gasoline consumption is reduced by up to 10%. However, towards the end of the spark plugs' life, their effectiveness in relation to the engine decreases slightly. Few people leave them running longer than the recommended mileage, because the engine loses its power, which means gasoline consumption increases noticeably. Although this is observed when using other candle models beyond the deadline.

Advantages and disadvantages

• Reasonable price
• Reliable build
• Standard resource

• Ineffective after the resource has expired

The best spark plugs for Lada Largus

For Lada Largus with a 16-valve engine, spark plugs with two electrodes are suitable, which are suitable for an 8-valve engine, but the other way around will not work. On 8-valve engines, only 2-pin spark plugs are installed. They have two side electrodes; such products increase the efficiency of the power unit, plus it reduces vibration during operation.

There are a large number of different models of car spark plugs on the market that are suitable for the Lada Largus. However, not all of them correspond to the declared characteristics, ensure normal operation of the power unit and have a long service life. We tested a large number of candles from dozens of manufacturers, which allowed us to create a list of the best candles. When compiling it, we took into account the results of our tests, as well as reviews from car owners and automotive experts.

Spark plugs for Lada Largus

When buying candles on Lada Largus, you do not just purchase the necessary consumables. The correct selection of an element, insignificant in size and cost, determines the behavior of the car on the road, the cost of its maintenance, and your mood. Correctly selected spark plugs directly affect the speed, dynamic, and performance characteristics of the car.

The spark plugs included in the ignition system of a gasoline internal combustion engine serve to generate an electrical discharge. Under the influence of incoming voltage, a spark is formed between their electrodes. The subsequent ignition of the fuel mixture provides the energy necessary for the vehicle to move.

Faulty spark plugs can cause a lot of problems and hassle. The most serious ones include the following:

• difficult, especially at low temperatures, starting;
• unstable engine operation in idle, low and medium speed modes;
• reduction in power, deterioration in vehicle acceleration dynamics;
• increased fuel consumption.

All this makes the choice of spark plugs for Lada Largus not just part of the next technical or seasonal maintenance.

Lada Largus engines allow the use of spark plugs from different manufacturers, models, and operating data. Only their external characteristics remain unchanged - M14 thread with a length of the corresponding part of 19 mm, installation dimensions for a spark plug or socket wrench of 16.

Let's look at the most popular models of spark plugs that are equipped with Lada Largus engines. They differ in the number of contacts, as well as the metals used for their manufacture. Based on this, it is possible to install spark plugs with one or more side electrodes. The materials used are traditional chromium-nickel alloys or platinum group metals.

Let's start with the most common single-pin spark plugs.

The manufacturer of the K7M power unit with 8 valves provides for the installation of Renault spark plugs - a simple and reliable ignition source. It is manufactured mainly in France or in other countries under the strict control of the developer. Among high-quality analogues, it is recommended to use candles from manufacturers such as Bosh, Denso, NGK.

Among the best developments are the German Bosch FR7DC+ with iridium coating, the Japanese Denso K20PRU11 and NGK 4856 BKR6E. These models are distinguished by proven quality and long service life. All of them are equally successfully installed on the K7M 710 or the K4M 690, which has 16 valves.

The electrical discharge constantly arising between the central and side electrodes gradually leads to the destruction of the latter. The multi-contact design significantly extends the life of the spark plug. Therefore, installing Renault or Bosch FR7DC+ two-pin spark plugs on eight-valve K7M engines reduces the cost of periodic maintenance of Largus vehicles.

Among the three-pin spark plugs, it is worth noting Bosch 0241235752. By forming a stable spark, they ensure complete combustion of the fuel-air mixture. This helps the engine produce maximum power and optimal traction characteristics.

I would like to complete the review of spark plugs recommended for Lada Largus with iridium NGK Iridium 6418 BKR6EIX. Among the main advantages are a long service life (at least 70,000 km when consuming high-quality gasoline) and excellent starting qualities in the cold season.

Changing spark plugs in a Lada Largus engine is not difficult even for inexperienced car enthusiasts. A minimum of tools, good accessibility - even for the first time, the whole operation will take no more than half an hour.

The procedure for removing spark plugs for the K4M and K7M engines differs in only one way. On the 8-valve, before dismantling, it is enough to remove the high-voltage wires. In a 16-valve engine, it is necessary to unscrew the bolts securing the ignition coils. When performing work on any engine, it is recommended to clean the spark plug wells from dirt with compressed air.

The performance of your car’s engine depends on what spark plugs you install on your Lada Largus and how promptly you change them. By making the right choice, you will make life easier for yourself and your pet.

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Source: https://largus-shop.spb.ru/helpful/item/2640-svechi-zazhiganiya-dlya-lada-largus