Which spark plugs are better for Priora 16th grade: review, types and recommendations

According to the official technical regulations of AvtoVAZ, spark plugs on Lada Priora cars (VAZ 2170, 2171, 2172) are replaced every 30 thousand km. It is for this mileage that the life of the spark plugs is designed.

However, some drivers neglect the factory recommendations and change spark plugs less often, as a result of which engine wear increases. In the article we will look at this issue in more detail, we will tell you which spark plugs to choose and how to change them.

Classification

You need to approach your choice as responsibly as possible. It is worth deciding which type of spark plug is best suited for the car.

So, these elements have their own classification according to:

• Number of electrodes: two- and multi-electrode. The first type consists of several elements. These are the side and central electrodes. These are installed standard on Priora. As for the second type, they have one central and three side electrodes. As reviews note, these candles have a longer service life and are more reliable.
• Type of material. Often spark plugs are equipped with copper electrodes. What are the best spark plugs for Priora? Judging by the reviews, they have a short resource - up to 30 thousand kilometers. But recently more “tenacious” iridium analogues have appeared on the market. Their resource is about 60 thousand. By the way, such candles have a slightly smaller diameter of the central electrode. If on copper it is 2.5 millimeters, then on iridium it is 0.7 millimeters.
• Thread diameter. When purchasing, check with the seller for which engine you need spark plugs. Thus, 16-valve valves are equipped with elements with a smaller head size and thread diameter. Spark plugs from an 8-valve engine simply won’t work in a 16v Priora.
• Heat number. This parameter means the pressure at which it is easier to heat the candle. There is a cold and a hot type. The glow number of these candles is 20 and higher for the first and 11-14 for the second. Which spark plugs are better for Priora 16 cl.? There is no clear answer to this question. But there are also universal options. In this case, the glow number is from 11 to 20. These are the spark plugs that many motorists use. They behave well both in summer and in cold weather.

Replacing spark plugs for a Lada Priora car with 16 valves

To replace spark plugs on a Lada Priora car, prepare a special socket wrench with a “10” head.

Priora is a car sensitive to the gap in the spark plug, this can affect fuel consumption and traction. For 16 cl motors, a gap of 1 cm is measured by the factory. It is important to check the gap between the electrodes before installation.

This is usually checked with a round probe that looks like a coin. Of the Russian coins, only 10 kopecks more or less fit this role - their thickness is 1.25 mm. This gap will increase as the engine runs.

Remove the negative voltage from the battery, and then put the car on the handbrake so that nothing interferes with the work. Replacing spark plugs on a Priora is done in 5 steps, see them below:

1. remove the plastic casing;
2. unclip the wire block clamp, disconnect them from the ignition coil;
3. remove the coil mounting bolt, then pry it off with a flat screwdriver and remove it;
4. there is a candle in the well - this is what is needed now. Remove it using an extension cord.
5. put a new part in place of the old one.

What does the manufacturer recommend?

The Volzhsky Automobile Plant regularly uses spark plugs marked AU17DVRM.

. Judging by the reviews, the service life of these spark plugs is 25 thousand kilometers. This is quite good, considering the low cost - 400 rubles per set. But products with this marking perform poorly in cold weather. What spark plugs should I put on the Priora 16 valves for winter use? Here it is better to use “Priority A 15 DVRM”. These candles have a lower heat rating. They ignite more easily at subzero temperatures.

Types of spark plugs: iridium and regular

The first iridium spark plugs for cars were produced by Denso. Today they claim that such parts, unlike conventional ones, have a longer service life. We installed such parts on the Priora, but did not notice the difference - perhaps this is just a marketing ploy. We don’t think that the Priora is anything special and there will be a noticeable difference on other cars. But still in terms of technology: durability is due to the gas-tight insulation of the central electrode, aluminum oxide insulators, reduced loss of electric current, a high degree of insulation, and a large volume of the ignition zone.

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Denso even produces special models for AvtoVAZ. The electrodes are coated with a lubricant mixture, which increases their gas impermeability, while the temperature in the ignition unit remains optimal - premature or late ignition is excluded. The side electrode is designed in such a way that it allows ignition to be optimized; in this case, even a lean mixture will be ignited.

You can install iridium spark plugs on the Lada Priora, the advantage of which is clear - they need to be changed much less often. But the service life of these elements will be significantly lower than that declared by the manufacturer. The fault lies not in the malfunction of the car - the quality of gasoline leaves much to be desired.

As mentioned earlier, iridium spark plugs can even light a lean mixture. When they work with a contaminated mixture (and the risk of running into unscrupulous filling remains high), they suffer even more. This is comparable to the work of the lungs of a person who lives in a non-ecological area: not only does fumes settle everywhere, the wear and tear of the “organs” accelerates.

Valve replacement of ignition elements for Lada Priora 16 valves is real. Manufacturers producing analogues for this VAZ car produce similar copies from iridium. But don’t rush to rejoice: even if you are promised that the spark plugs will last about one hundred thousand kilometers, on Russian roads this is unlikely to be true.

However, take care to ensure that the cylinder head gasket is always completely sealed against leaking oil. If oil gets on your iridium spark plugs, your expensive purchase will be rendered useless.

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Analogs

Which spark plugs are better for Priora 16 cl.? For those who do not want to buy factory spark plugs, there is a huge selection of analogues:

• Products from the British. Which spark plugs are better for Priora 16 cl.? For such an engine it is worth purchasing the “Champion” RC9YC.
• Candles from German. They are little popular, but have a high resource. The marking for Priora is 14FR7DU.
• Japanese candles NGK. Perhaps the most popular analogue of factory products. NGK marked BCPR6ES is ideal for the 16-valve Priora.
• "Denso". This is also a Japanese manufacturer. The cost is on par with NGK, and the quality is not inferior either. For Priora you should buy Denso Q20PR-U11.
• "Brisk" (Czech Republic). Another popular spark plug manufacturer. The manufacturer offers products with different heat ratings and number of electrodes. Spark plugs DR15YC-1 are suitable for Priora. The same ones are used on Kalina engines of the first and second generation, with a 16-valve timing mechanism. But judging by the reviews, the products are of low quality - the electrodes are greatly offset from the center, which is unacceptable for such products.

What spark plugs are currently best for VAZ 16 cl.? When choosing, you should give preference to the original - AU17DVRM. By the way, the packaging says “BOSH Group”, but the products were manufactured in Russia. For those who want to use an analogue, NGK candles are suitable. They are distinguished by a good resource and low cost.

Basic faults

The time has come to explain why it is worth carrying a certain supply of candles with you for the Priora. Don’t even store them in the garage or at home, but put them under the trunk lid so you don’t have to worry about anything when a critical situation occurs. When the “spark” doesn’t go after a hard day at work, you definitely won’t be eager to walk to the nearest auto parts store.

You can determine the malfunction of the Priora spark plugs by the following signs:

• Starting the engine is difficult (that is, the starter rotates, the fuel-air mixture is supplied inside the chamber, but there is still no spark; the engine will start if you turn the starter for a long time).
• Fuel consumption has increased (there may be several reasons for this phenomenon, but if at least one more reason from the list appears, it is worth inspecting the ignition unit).
• The proportion of carbon monoxide coming out of the exhaust system has increased.
• The engine power has decreased (this is especially noticeable during acceleration - there is no usual “traction” and good acceleration).
• The engine is misfiring, which means one of the cylinders is not working - simply because “its” spark plug did not give a spark, the mixture did not ignite.
• Usually the spark plug is changed every 15,000 km (for many this is one year of driving with their favorite car), but they can be “flooded”. This is a more serious problem that will take a little longer to deal with.

Let's get started

So, first, open the hood and remove the decorative engine cover.

It is installed on clips. Next, remove the terminals from the ignition coils. The latter also needs to be removed (using the key at “10”).

Note! When removing the high-voltage cord, do not hold the cord - it may be damaged. You only need to grab the rubber tip. If the element is damaged, misfire may occur. The engine will start to stall, and the car itself will begin to consume a lot of fuel (since it needs more energy to push the idle piston in the cylinder).

Now let's move on to the candles themselves. We lower a specialized key into the shaft and begin to unscrew the spark plug counterclockwise using the handle.

You need to remove it very carefully - you must not allow it to fall into the well. Otherwise, part of the insulator may break off and fragments will fall into the cylinder.

Helpful advice: if you don’t have a key with a magnet, you can use the ignition module itself - install it on the end of the spark plug and pull it back out. This way we can remove the old element carefully and without damage.

Recommendations for replacement

This operation is extremely simple; any car enthusiast can change the spark plugs on a Priora. You must have a 10mm wrench and a spark plug wrench with a universal joint and a rubber bushing, which is located inside the hexagon and allows you to pull spark plugs out of deep wells. Instructions for performing the work:

1. Open the hood and remove the plastic decorative panel from the engine; on the Priora it is attached with rubber bushings and removed by hand.
2. Remove the terminals from the ignition coil, then use a 10 mm wrench to unscrew the fastening bolt and remove the coil.
3. Insert the spark plug key into the well and push it onto the spark plug until it stops, carefully loosen it and unscrew it, and pull it out of the well along with the key. It happens that the candle cannot be weakened. In this case, you cannot force the key; you need to try to do it on a hot engine. If this does not help, you can treat the wells with WD-40 aerosol lubricant, then put a short piece of metal tube, up to 40 cm in size, onto the spark plug wrench knob. Very carefully apply force to the lever and move the spark plug along the thread. If the tube or key begins to bend from force, and the spark plug does not give in, you need to complete the process and seek help from a car service center.
4. After checking the gap between the electrodes, insert a new spark plug into the hexagon of the key, immerse it in the well and screw the spark plug into place. Tighten by applying manual force to the key knob, without any additional levers, otherwise it will become problematic to loosen the spark plug next time.
5. Reinstall the ignition coils in reverse order, insert the terminals and put the decorative panel on the engine. Start it, make sure it is working properly and close the hood.

The correct choice of a set of spark plugs for the Priora and their timely replacement in the event of a malfunction will extend the life of the engine and help prevent serious consequences from incomplete combustion of the fuel mixture.

Which candles are better for Priora 16th grade: review, types and tips

A huge number of systems are used in the design of the motor. Which wipers are better for winter and the nuances of choice. One of these is the ignition system. It consists of coils, armored wires and spark plugs. The latter play a significant role in the operation of the internal combustion engine. The engine life depends on their quality and serviceability. Experts recommend replacing them every 30-40 thousand kilometers. What spark plugs are suitable for Priora and how to install them? Let's try to understand this issue.

Installing new ones

How do you then replace the spark plugs? Before installing new ones, you should check the gap between the side and central electrodes. It should be about one millimeter. The parameter is checked using a round probe. It is shown in the photo below:

Please note: over time, the spark plug gap increases. Once every 15 thousand kilometers it is recommended to check this parameter and, if necessary, adjust it.

If the gap is OK, put the spark plug on the tip of the ignition module and lower it into the shaft. Next, use a wrench to tighten it until it stops. There is no need to pull hard. The recommended tightening torque is 25 to 30 Nm. At the next stage, screw the coils and insert the terminals.

Next, we put the decorative plastic cover on the engine and try to start the engine.

When to change spark plugs

According to the technical inspection regulations, spark plugs on Priora must be replaced every 30 thousand kilometers. However, this interval is not always maintained, and they are subject to emergency replacement.

The need for replacement can be determined by engine performance. It becomes unstable at idle, the engine starts poorly, and increased fuel consumption is observed. Also, her appearance can tell about her condition. First of all, you should pay attention to burnt electrodes, both central and side. Cracks on the insulator of the central electrode are also a bad signal; chips in it should also be a warning. General sootiness indicates poor ignition, and gasoline or oil indicates its complete inoperability.

If carbon deposits appear

After 15 thousand kilometers, it is recommended to re-inspect the condition of the spark plugs. Sometimes brownish-yellow carbon deposits can be observed on the surface of the electrodes. This indicates the use of fuel with an octane rating that is not suitable for the vehicle. When the spark plug overheats, the carbon deposits will turn white. Erosion is also possible. The reason may be early ignition timing. Sometimes the candle is simply not screwed on tightly. Also, with early ignition, the electrode itself melts. This spark plug is for replacement only. Which spark plugs are better for Priora 16 cl., see above.

If the car is moving, you should check the part with a tester for functionality. Typically, a gun with a metal tip and cap is used for this. The tip is touched to the thread of the spark plug, and the cap is placed on the terminal for the armor wires. When you pull the trigger, a spark should occur between the electrodes. If it is not there, the element needs to be replaced.

When do you need to change spark plugs?

The replacement interval of 30 thousand km is very arbitrary. The AvtoVAZ company equips Priora engines with domestically produced single-electrode spark plugs marked A17DVRM for a 16-valve unit and AU17DVRM for an 8-valve unit. Practice shows that even on a new car, these spark plugs often fail long before the end of the service interval, causing unstable engine operation and increased fuel consumption. For this reason, many car enthusiasts prefer imported products.

Fault diagnosis

The best way to determine performance is to test the spark plug under pressure. The essence of this diagnostic method is to check sparking on the electrodes under conditions close to operating conditions. To do this, a candle is screwed into a special chamber equipped with an inspection window, and a discharge is passed through it, while air is pumped into the chamber with a compressor or manually.

At a certain moment, the discharge on the electrodes will begin to fade, and then completely disappear. Record the pressure gauge readings at this moment and compare them with the pressure in the cylinder, which was previously measured with a compression gauge. Plus 2 atm should be added to the compression meter readings. since the starter speed is much less than the engine operating speed. If the pressure in the cylinder is higher than the spark attenuation pressure at the electrode, the spark plug should be changed, because in operating mode it does not ensure complete combustion of fuel, and its excess begins to enter the engine oil sump.

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The consequences of driving a Lada Priora for a long time with faulty spark plugs can be disastrous, because, in addition to loss of power, some of the unburned fuel dilutes the engine oil, which harms engine parts. Then, in the form of vapors through the crankcase ventilation system, it again enters the cylinders, supersaturates the combustible mixture, which again does not completely burn on faulty spark plugs and ends up in the oil.

Therefore, if unstable operation, jerking, or failure occurs, you should immediately unscrew and inspect the spark plugs. Thick black deposits on the electrodes plus black exhaust from the pipe when the engine is running indicate an over-enrichment of the combustible mixture or an unsatisfactory condition of the spark plug itself.

If the coating on the electrodes is white and fluffy, and bluish smoke comes out of the exhaust pipe, then this is a problem with engine oil getting into the cylinders, so the oil caps or piston rings should be changed. All these additional loads on the spark plugs have a negative impact on them, and in any case they need to be checked for functionality and, if necessary, replaced ahead of schedule.