TOP 10 best spark plugs for VAZ (Lada)

What is a candle for?

A car's spark plug is one of the main elements of the internal combustion engine. It is this that forms a spark in the combustion chamber of the engine, thereby igniting the air-fuel mixture in the cylinder block, which sets the piston group in motion. For each car there are certain spark plugs that are recommended by the manufacturer. They differ in the long thread of the spark plug, the number of contacts, resistance and hex head.

Candle device

Which spark plugs for VAZ are better to choose?

There are a large number of different modifications of the part, which complicates life for motorists. The problem is that each motor is designed for a specific type of spark plug. If you supply the wrong part, a number of negative consequences can arise.

1. Misfire of the mixture due to the gap between the electrodes of the element being too wide.
2. Interruptions in the operation of the internal combustion engine caused by too low spark power.
3. Instant failure of the device due to too much electrode protrusion.

Also, depending on the inconsistencies present, other malfunctions may “pop up” that reduce the comfort of using the car.

What to look for when choosing.

Specialists from the AvtoVAZ plant recommend selecting spark plugs according to a number of parameters.

1. Heat number. The parameter characterizes the rate of heat removal from the working part of the candle. At the same time, the electrode transfers excess heat to the spark plug skirt in a timely manner, which ensures stable operation of the part. If energy is removed too quickly, scale forms on the working part of the part, which prevents normal spark breakdown. If the withdrawal is too slow, the thin electrode overheats. The process provokes the formation of glow ignition. This prevents the engine from operating normally due to detonation of the mixture or its early ignition. Under normal thermal conditions, a spark adequately breaks through the spark plugs and does not form excessive carbon deposits.
2. Spark gap. Some users know that for the engine to operate correctly, the spark gap on the spark plugs must be maintained. The working gap on VAZ spark plugs is strictly set by the manufacturer of the power plant and is necessary due to the fact that the formed electric arc has a certain strength. As the distance increases, the spark loses stability, which can lead to misfires. In the opposite case, easier starting of the engine is ensured, but when the gas is released, the electric arc current may not be enough. This is justified by the fact that each ignition coil has a certain transformation ratio, usually equal to 2000 units. This means that during the start-up of the internal combustion engine, the elements produce up to 14 kW, and during normal operation it is already 24. Consequently, failure to comply with this parameter can lead to serious disruptions in the operation of the motor.
3. Departure of the working part of the electrodes. The parameter is critical for adequate operation of the power plant. The spark plugs on the VAZ 8-valve injector, as well as for carburetor models, have electrodes strongly pushed forward. This is due to the fact that the structural parts are located in the corner of the combustion chamber, where there is no adequate ventilation. The overhang of the working part allows for better ignition of the mixture and stabilizes engine operation. If the spark plugs are mounted in a multi-valve engine, where the inserts are located in the center of the valve head, it is recommended to install spark plugs with a deep-set core - this will prevent damage to the electrodes by the piston bottom and an abundance of carbon deposits on the structural elements.
4. Number of electrodes. Initially, manufacturers position this parameter as a definite plus. When one electrode “burns out,” the spark plug switches to another, which significantly increases its service life. However, not everything is as simple as it seems at first glance. If the mixture is sprayed unevenly in the cylinder (poor ventilation of the combustion chamber), and at this moment the spark jumps to the shadowed part (the place where the exhaust remains), misfire may occur, which will lead to unstable operation of the power plant. Additionally, this fact increases the wear of the catalyst and engine oil, which is critical for VAZ cars.
5. Manufacturer. The manufacturer of the product is also an important parameter. Users recommend buying from trusted brands that have been on the market for a long time. The cost of such candles will be significant, but with proper selection and operation they will work for a long time and without significant complaints.

By adhering to the specified parameters, a car enthusiast can buy a fairly high-quality product, while saving on the frequency of car servicing and repairs.

Recommended spark plugs for Lada Priora 16 valves

The manufacturer recommends using domestically produced single-electrode spark plugs on the Priora, type: AU17DVRM. These spark plugs can be replaced with imported analogues of the following brands: Bosch, Denso and NGK.

It should be noted that it will be impossible to install spark plugs from 8-valve cars on a 16-valve engine, since the hex nut on the spark plug is larger and simply will not fit into the spark plug well of a 16-valve engine. Therefore, it is recommended to purchase spark plugs designed specifically for your engine.

Table of interchangeability of spark plugs for all Lada Priora engines (depending on the number of valves).

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.

The best spark plugs for Priora

During surveys on website forums, it was revealed that most of all Prior owners trust domestic spark plugs AU17DVRM and spark plugs NGK N11. It is these products of domestic and Japanese production that are the most reliable spark plugs for AvtoVAZ engines.

NGK spark plugs for Lada Priora

The service life of these spark plugs can reach up to 30,000 km of vehicle mileage, which is quite good. But these figures can only be obtained with proper use of the car, because even new spark plugs can quickly fail. Quite often, spark plugs fail precisely because the internal combustion engine is started in cold weather. They are filled with gasoline and eventually pierce the insulator or electrode, after which the spark plug becomes inoperative.

How to choose the right spark plug

It is important to purchase high-quality spare parts for a car; in order to buy a good product, you need to pay attention to the following selection criteria:

1. It is necessary to order a product compatible with the machine's engine. Most of the best brands clearly indicate the vehicle models their product will be compatible with. Therefore, you need to carefully review the manufacturer's compliance list.

2. Apart from compatibility, you need to choose the design type as there are various options available. The most common:

• Copper-Nickel: The name may confuse you because these products are primarily made of nickel, with only the inner core being made of copper. It conducts current well, which is why most electrodes are made from it. The product is inexpensive, its disadvantage is that it has a short service life, even if used in a high-energy ignition system without a distributor. Many vehicles will benefit from this option; it is suitable for natural gas engines.
• The next type has a platinum center contact. It is expensive due to the rarity of this element, which is harder than nickel, so you can be sure that the product will not corrode. The platinum will prevent the tip gap from widening and wearing out, which directly affects the efficiency of the engine. There are models with one or more electrodes. This helps generate the spark in the best possible way. In terms of service life, it is twice that of standard nickel/copper construction.
• Iridium Product: If you want flawless, smooth motor performance, there is nothing better than an Iridium product. It has a longer service life than traditional models. The thin wire central contacts are designed to conduct current most efficiently. These are expensive products, but the price is offset by incredible performance.
• Silver candles are an option with the best thermal conductivity. The problem with this product is its durability. The precious metal cannot match the durability of platinum or iridium models.

All designs fit any vehicle in one way or another, but the platinum-based option is more universal. It is relatively affordable than iridium and much better in performance and durability than copper-nickel devices.

3. It is important to decide: “What kind of ignition is needed, cold or hot?” To give a very simple but precise definition, we can say that candles that glow during operation are hot. And those that do not reach high temperatures are cold.

The metal shell of the structure operates at the same heat as the head. The elements are screwed to each other, forming a chamber in which heat is distributed evenly. Hot models have a long insulator tip with a large surface area, causing all parts to become hot. At the same time, cold ones have a small cap that helps quickly remove excess degrees from the combustion zone.

Russian-made models usually have a numerical heat rating. Their assessment is not always consistent because some brands give higher values ​​while others underestimate.

It becomes extremely difficult for buyers to choose the right product with so many options. It is best to order the design in accordance with the car's engine and year of manufacture.

4. If you do not want to suffer for a long time during replacement, it is better to choose a design that is easy to install. By applying the above selection criteria, a productive model can be easily determined.

Below is a table of compatibility of spark plugs for a Lada car: