When buying spark plugs for a Priora with a 16-valve engine, they usually create a reserve for themselves so that they can install a new one immediately after one of them becomes faulty. If you manage to start the car with one faulty spark plug, then failure of the remaining parts will result in the car refusing to start.
In general, let’s immediately dispel the myth that 8-valve engines require some other spark plugs for a Priora car. In 16th grade, like in 8th grade, the same is given. Changing the spark plugs on a Priora is easy; in this article we will tell you how to do it, but that's all: The price of components for a Lada Priora car is not high - so I advise you to change them more often. To avoid more serious repairs. Because, having acquired carbon deposits from bad fuel, this will affect the engine by friction. Priora, like other cars, requires attention. Replacing oils and components.
Thinking about which spark plugs are best to install on a Priora, many refuse to believe in the miraculous power of analogues, installing only standard parts in their car, because the manufacturer swears that they will not harm the car. But every time a car owner sees the painfully familiar color of soot, he prepares to replace the ignition elements. I will say the following - on a Priora, a lot depends on gasoline and even driving style. It will be healthier to refuel at a good gas station, but that’s not all. You need to drive the car not only sluggishly, but sometimes give it a normal load. Moreover, it is better to do this periodically.
There is nothing difficult about changing the spark plugs in Priora yourself. This is a routine operation that is comparable to replacing headlight bulbs. It is recommended to check the gap between the electrodes from time to time. It is better to look for spark plugs for Priora in advance. When purchasing a set of elements for a Lada Priora car with 16 valves, try to compose it from the same models - so that there are no differences “in the row”.
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.
- 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.
Varieties of candles
Spark plugs are divided into multi-electrode and two-electrode. For multi-electrode spark plugs, one is located in the middle and the rest are located at the edges. It is believed that such spark plugs last longer than two-electrode spark plugs. They have only two electrodes - one in the center, the other on the side. Spark plugs are also divided into regular, iridium or platinum.
Iridium spark plugs for Priora
Another characteristic of candles is their potassium number. The heat number is the average pressure at which it is easier to heat candles during testing. So, they are distinguished by types: cold (heat number above 20), medium (17-20), universal type (11-20), hot (11-14).
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.
Manufacturers and prices of analogues
It is not always possible to find a standard set of spark plugs for the VAZ-2170 in the nearest stores. Therefore, you can install four new parts, in accordance with the number of cylinders under the hood. The choice of elements, thanks to other manufacturers, has become more diverse:
- Bosch (manufactured in: Russia) au17dvrm. Price – about 250 rubles per set;
- Denso (Japan) w20epr. Price – 140 rubles per piece;
- Brisk (Czech Republic) lr15yc. Four pieces – 300 rubles;
- NGK (Japan) bcpr6es. One piece – 150 rubles;
- NGK (Japan) bcpr6es price per unit – 200 rubles;
- Bosch (Germany) fr7dcu. One piece – 100 rubles;
- Lecar Kit – 230-250 rubles;
- Valeo 246871. One piece – 170-180 rubles;
- Beru (Germany) 14R-7DU. One piece – 140-150 rubles;
- Champion (England) RN9YC. One piece – 230-250 rubles.
Let's get started
So, first, open the hood and remove the decorative engine cover.
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.
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.
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:
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.
Instructions for replacing spark plugs on a 16 cl engine
So, if we are replacing spark plugs on a 21126 engine, then before removing the plastic decorative cover, it is necessary to remove the absorber purge valve from it. The photo shows that the valve simply lifts up and moves out of the way.
Remove the absorber purge valve
Next, remove the plastic decorative cover and see in front of you 4 ignition coils, which are mounted on spark plugs. To get to the spark plugs you will need to unscrew all the coils.
Removing the decorative cover
We disconnect the plugs from the coils, and using the E8 sprocket, unscrew each of them. We take them out of the block and you can start replacing the spark plugs. For a 16 cl engine, the spark plugs come with a “16” thread, so we take a 16 wrench and carefully unscrew each spark plug. If the replacement is made for the first time, the spark plugs may “go tight”.
Disconnect the pads from the ignition coils
Unscrew the coils
We take out the coils
We take out the spark plugs and install new ones. They should be tightened first by hand, so as not to damage the thread, and only then with a wrench.
We take out the old ones and install new spark plugs
The tightening torque for the spark plugs on the Priora is 25–30 Nm. There is no need to pull the thread too hard
After replacing and tightening all the spark plugs, install the ignition coils and reassemble in the reverse order. Look at the old candles, we have already written above about their soot and what it can mean.
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.
WHAT IS THE DIFFERENCE IN CANDLES FOR 8 AND 16 VALVE PRIORS?
As mentioned above, Priors with 8 and 16 valve engines require different spark plugs. According to the recommendations of Auto-VAZ, spark plugs for 16 valve Priora must comply with the A17DVRM standard, and for 16v engines - AU17DVRM.
In fact, the differences between them lie solely in the design features - devices labeled A17 are designed for a standard hexagon, AU17 - for a smaller one.
You can see the features of marking of domestically produced products in the image.
Features of marking spark plugs of domestic production
SELECTING THE BEST COPY
Let's figure out which spark plugs to put on the Priora 16 valves. Many drivers agree that these ignition elements are consumables, for which there is no point in overpaying, since they will still wear out after 20-30 thousand kilometers. If you have a similar opinion, the domestically produced AU17DVRM is your choice. They are not expensive and work, in principle, quite well.
When choosing among products from foreign manufacturers, we recommend giving preference to the following companies:
- Beru (standard 14FR-7DU);
- NGK (BCPR6ES);
- Denso (Q20PR-U11);
- Bosch (FR7DCU);
- BRISK (DR15YC).
The best spark plugs for a 16 valve engine, according to Prior owners, are made by the Japanese company Denso. Their iridium spark plugs on the Priora - Denso Iridium Power - have proven themselves well, and can travel for about 50-60 thousand km without any problems.
In general, the presence of an iridium electrode significantly increases the durability of the structure; moreover, iridium models retain their original characteristics throughout their entire service life.
For clarity, we present a graph of the increase in fuel consumption as different electrodes wear out.
Graph of increase in fuel consumption as different spark plug electrodes wear (iridium and conventional)
We’ve figured out which spark plugs are best for 16-valve Priora engines – let’s move on to 8-valve engines. The situation is similar for manufacturers: the best budget option is A17DVRM from our ZAZS plant.
Let us draw your attention to the fact that domestic A17DVRMs are an order of magnitude more durable and reliable than nameless Chinese ones at the same cost, so there is no need to be led by beautiful names and bright packaging.
Versions of high-quality foreign models tested by Prior owners - NGK BPR6ES and DENSO W20EPR - they are not cheap, but they are worth their price in full.
The Bosch FR7DPX Platinum also performed well. Reviews from prior drivers indicate that with them the car drives differently - the vibration in the engine disappears and the speed picks up better, and there are no problems with ignition even in severe frost.
How to replace spark plugs
Before installing a new product and removing failed spare parts, you must disconnect the negative pole of the battery, which, unlike the positive one, is black and has a “-” symbol. The cost of replacing the device is very low, starting from 150 rubles each. The cost will increase or decrease depending on the volume and number of cylinders.
On average, gasoline vehicles are serviced every 60,000 km. However, depending on how intensively the car is used, this interval may be shorter and the glow system will fail between 35,000 and 40,000 km.
Remember that if only one spark plug is faulty, it is advisable to replace them all at once. Below we provide step-by-step instructions necessary for installing the equipment:
- a wrench of a certain width so that you can unscrew and secure the new device;
- ratchet or hexagonal head to facilitate removal of the product;
- a compressor with compressed air to thoroughly clean all openings and connections;
- goggles to protect your eyes from debris that may bounce off during blowing;
- You need to put gloves on your hands, they will come in handy when working with cables.
1. First of all, keep in mind that the engine must be cold, you need to start working after 2 hours from the moment of using the equipment. The spark plugs are usually visible or under a plastic protector. They have a characteristic shape that will be very easy to find.
2. Disconnect the high-voltage cable from the required plug, carefully pulling it towards the top so as not to damage it. Do this carefully, remembering the location of all the wires so that you can then secure everything in its place.
3. Remove the fork and spool using a hex wrench, appropriate ratchet, or wrench. To remove the device, you need to turn the tool counterclockwise.
4. Then blow out the mounting hole, completely clearing it of dirt. It is important to wear safety glasses when doing this.
5. Secure the new product. Lubricate it and start screwing it in carefully by hand, applying a little force, then use a wrench to tighten the device, being careful not to overdo it too much.
6. Insert the ignition coil, tightening it with the screws and ratchet you used earlier. Be careful not to apply too much pressure as this may damage the threads and the reel itself.
7. Connect the cable and repeat the same process for each design.
If you did everything correctly, used the appropriate key size, unscrewing the heads, the car will start and work more efficiently.
