Tips for replacing spark plugs on a UAZ Patriot with a Euro 4 engine

UAZ Patriot is a recognized leader among Russian SUVs. Euro 4 engines (ZMZ-409) are excellent solutions for such machines. Motors that are actively used by automobile companies in Europe are now gaining popularity in the CIS countries. They work due to such an important element as candles.

The factory equipment will work without problems until the mark on the odometer exceeds 20,000 km, but only under one condition - the fuel must be of high quality. Otherwise, the part will deform quickly. Gasoline and diesel that meet the standard are very difficult to find. Almost all gas stations dilute the liquid with water and other compounds. It is difficult to provide excellent working conditions for spark plugs, and this is not the driver’s fault; as a result, they quickly fail.

Specifications

The ZMZ 409 Euro 4 engine has improved technical characteristics compared to its older brother. Thus, the power unit, due to the fact that it was designed on the basis of the 409, received high technical characteristics and endurance.

In addition to the Euro 4 standard, there are a number of modifications that are worth considering:

1. ZMZ 409.10 is the main motor, meets the Euro-2 environmental standard. Power 143 hp
2. ZMZ 40904.10 - analogue of 409.10 with a new CPG, new gaskets, DBP, complies with the Euro-3 environmental standard. Power 128 hp Installed on Patriot, Hunter, Pickup, Cargo.
3. ZMZ 40905.10 - analogue of 40904.10, compliance with the Euro-4 environmental standard. Power 128 hp Installed on Patriot, Hunter, Pickup, Cargo.
4. ZMZ 4091.10 - derated low-end version of ZMZ 40904.10, another receiver, camshafts (lift 8, phase 240), firmware, complies with Euro-3 environmental standard. Used on UAZ loaves. Power 112 hp
5. ZMZ 4092.10 is a non-serial motor. Power 160 hp Used on the Volga.

Motor ZMZ 409

Selection of spark plugs for the VAZ 2114
This engine was put on the conveyor in 1996. Today, based on this internal combustion engine, several units with a volume of 2.3 to 2.7 liters are produced. These are installations of models 406 and 405. This included the 409 engine. This engine was mainly installed on new and modern domestic UAZ and GAZ cars. The entire generation of these power plants is equipped with a gas neutralizer and is manufactured entirely in accordance with EURO-2 standards.

Over the course of several years of production, the engines underwent major changes and modifications several times. In 2003, the design of the camshafts was changed. The tensioner shoes made of plastic were replaced by sprockets, which eliminated the problem of failure of hydraulic pushers due to clogging of the engine oil with plastic wear products.

Then, along with the fact that the plant switched to imported components for particularly important engine components, the management conceived of even more serious modifications of its products. The camshaft system was replaced with a simplified unit. This immediately affected reliability. Many other upgrades were also made.

Today Zavolzhsky Motor Plant is a leading domestic enterprise. The products produced here have high characteristics and quality.

Features of the ignition coil device

The ignition coil (IC) is a small-sized transformer. A primary winding is wound on its magnetic core, and a secondary winding is installed on top of it, in sections. Both of them are installed in a plastic case, and the space between these components is filled with thermoactive polymer resin.

Also on the case there are low and high voltage contacts for connecting the device. In accordance with the coil connection diagram, low voltage pulses are supplied to the device from the control module. Once inside the device, these pulses are converted into high-voltage charges, which, in turn, are supplied to the SZ. The discharge is carried out simultaneously on two SZ (the author of the video is Alexander Terekhin).

Tuning the ZMZ 409 engine

Replacing Renault Logan spark plugs: frequency and selection of spark plugs

Owners of cars with this engine, in pursuit of greater power, quite often take a radical step - replacing the engine with suitable diesel units from powerful imported SUVs. This step makes it possible to make the car much “stronger” and more dynamic, but the cost of the solution may be unacceptably high for the average UAZ owner.

But there are also less expensive tuning options:

1. Engine chipping. ZMZ 409 is equipped with a MIKAS 7.2 or 11 control unit, which can be reflashed. Using special equipment and software, you can reassign some parameters of the block logic, making the engine “faster” and more responsive.
2. Installation of a turbine or compressor. This is a fairly popular step; boosting the engine with a compressor or gas turbine is incomparably cheaper than buying a new engine, and gives a noticeable increase in power. On average, a turbine allows you to increase the “power” of the engine by about 30%.

Basic aspects of ignition installation

Replacing spark plugs for Nissan Qashqai

The main aspects to consider when installing the ignition by marks:

1. First, you need to dismantle the front cylinder head cover; to do this, you need to unscrew four 12-point screws. In some engine modifications, dismantling also involves removing the fuel pump.
2. Then the upper hydraulic tensioner located in the head is dismantled; to do this, two screws securing the cover are unscrewed.
3. Next, the chain stabilizers are removed - the middle one, as well as the top one; for this, the two screws that secure them are unscrewed.
4. After this, the camshaft sprockets are dismantled. The shafts themselves need to be fixed using a 27 key, while simultaneously unscrewing the screws that secure them. In modifications of engines 4063.10, the camshaft sprocket is removed along with the fuel pump drive eccentric.
5. In accordance with the jig installed on the sprocket, six holes should be drilled in each of them. Their angular displacements should be 2, 30, 5, 00, 7 and 30 degrees from the set position of the factory hole, which is located along the axis of symmetry.
6. If, when adjusting the phases, it is necessary to turn the camshaft clockwise, the sprocket itself should be mounted on one of the additional holes with a positive offset. It is located to the right of the standard hole.

Read more: Buggy from VAZ 2108 drawings

Checking the spark plugs yourself

According to the wiring diagram for engines 405, 406 and 409, spark plugs are used to transfer spark from the switchgear to the engine cylinders. If the operation of the SZ is disrupted, this may affect the quality of the motor as a whole.

To check devices you will need an assistant:

1. You need to disconnect the high-voltage wire from the first SZ.
2. Using a key, the product is unscrewed from its seat.
3. One end of the device from the electrode side should be brought to the engine or metal on the car body, the distance between the electrode and the ground should be about 1-2 mm.
4. The assistant then turns the starter to try to start the engine. If at the moment of cranking a spark jumps between the electrode and the body, this indicates that the product is operational. In the same way, you need to check each SZ. Please note that problems with spark supply can also be caused by improper operation of the distributor, as well as damage to high-voltage wires.

Spark plugs ZMZ 405, 409, specifics

line of “thin” candles

1. Bosch spark plugs. These candles can be called a “workhorse”. Ideal replacement for factory equipment. The most important thing about them is the price-quality ratio. They are made at a factory in Russia, so the price per set is comparable to the price of “Brisk or our candles,” and the quality is much better. I recommend replacing these spark plugs together with changing the oil, that is, every 7-8 thousand km.
2. Denso spark plugs, TT series. Twin Tip technology. Two nickel electrodes, 1.5 mm in diameter. According to the manufacturer, the performance is almost the same as that of its older sisters, iridium spark plugs. And the price remained the same as regular ones. Based on practical application, I cannot say that after installing these spark plugs, the engines started working differently, but their service life is indeed longer than conventional ones, primarily because the spark gap does not change over time. The replacement interval is two to three times longer compared to conventional spark plugs.
3. Bosch spark plugs, platinum series. There are a myriad of rumors and myths surrounding these candles, about half of which are true. What is really cool about the so-called platinum-iridium candles, besides the beautiful expensive name. During operation, a spark runs from one electrode of the spark plug to the other, and during this process a microparticle of metal is “knocked out” from the central electrode. Over time, this leads to the fact that the gap between the electrodes increases to indecent values ​​and the energy of the coil is sometimes not enough to maintain a good, uniform spark. Therefore, the electrodes are coated with a layer of rare earth metals (platinum, iridium) with a thickness of 0.2 to 0.5 mm, depending on the coating. As a consequence of this, the main advantage of these candles is their large resource. Spark plugs ZMZ 409, 405 of this type can be changed every 30-40 thousand km, with good gasoline and a properly running engine. These candles are made at a factory in Germany.
4. Bosch spark plugs, multi-electrode spark plugs. In this case, four-pin. The advantage of these candles is again a resource. But there is also a nice bonus - reliable starting in cold weather. Moreover, I present this not as information copied from advertising sites, but as the result of my 20 years of “Yunnat observations”)). You can’t fool physics, and of course there is only one spark, not four. And she runs the shortest distance, to the nearest outermost electrode. When the central electrode is “knocked out” on one side, the spark begins to run to the other electrode, which becomes the closest one. In the northern regions and in winter, ZMZ 405, 409 spark plugs of this type definitely outperform single contact ones. Replacement interval, based on the depletion of the central electrode. But we can say that about 15-20 thousand km. And sometimes just according to the “season”. These candles are made in Germany.

Top 1. Denso Universal K20TT

Rating (2020): 4.74

5 reviews from resources were taken into account: Reviewer

The most powerful spark A special electrode manufacturing technology allows you to obtain a powerful spark, making Denso Universal K20TT spark plugs as easy as possible to start the engine under any temperature conditions.

The best performance in the cold season is demonstrated by the Denso Universal K20 spark plug, made using Twin Tip technology. Thanks to the central electrode diameter reduced to 1.5 mm, much lower voltage is required at maximum spark generation rates. This guarantees quick engine start at subzero temperatures and stable fuel combustion. The strength of the spark and the volume of ignition are comparable to those of a spark plug with an electrode made of rare earth metals, which are an order of magnitude more expensive. Reviews note that the gap in the Denso TT practically does not increase during operation, but after 15,000 km there may be misfires due to an insulator defect.

Spark plugs for UAZ from trusted manufacturers

The list of candles that are ideal for the UAZ Patriot consists of 5-7 options. The most popular brands producing products: Bugaets, candles from Denso and Bosch deserve a lot of attention, candles from NGK and Brisk would be an excellent option, and don’t forget about Finwhale.

Here is a brief description of spark plugs for UAZ Patriot from some of the above-listed manufacturers:

• Products BOSCH Platinum Plus FR7DPX. Their quality is average, but their service life is quite long. Using such spark plugs, you will definitely notice good engine power. The downside is the difficult start of the power unit.
• Budget model Brisk DR17YC. These products are enough for approximately 3 thousand kilometers. It should be noted that there is some instability during operation.
• For smooth operation of the “engine” of the AU 17 DVRM. At 800-5000 rpm there is no twitching or delay. There is noticeable throttle response, plus low-end stability, plus good power from the power plant.
• Another option is NGK BCPR6E. The price is no more than 550 rubles. Such candles perform well at the initial working stage.

The compiled rating of spark plugs for UAZ was selected taking into account the low cost, which is good news, and moderate performance during active use.

Current solutions from well-known manufacturers

The list of models that are suitable for Euro 4 engines includes about 5-7 of the most optimal options. What brands produce products for the UAZ Patriot? Brisk, Finwhale, NGK, Bosch, Denso, Bugaets. Good solutions for your UAZ Patriot and their brief description:

• Brisk DR17YC is one of the budget models. During operation, slight instability is noticeable, enough for 3000 km.
• NGK BCPR6E is an option that performs well in the initial stages. Price up to 550 rubles.
• BOSCH Platinum Plus FR7DPX are moderate quality candles that last for a long period. Good engine power is noted. The only negative is the difficulty of starting the engine.
• AU 17 DVRM is a configuration that is enough for at least 4,500 km. Spark plugs are used on 16-valve front-wheel drive VAZs. The engine runs great. There are no delays or twitches in the range of 800-5000 rpm. Optimal engine power, stability and throttle response at the bottom are noted.

The products were selected taking into account low cost and moderate performance indicators.

Top 4. BOSCH Platinum Plus FR7DPX

The presence of a platinum electrode and high quality manufacturing makes BOSCH Platinum Plus FR7DPX spark plugs the most reliable when used in UAZ Patriot engines.

Among the participants in the rating, these spark plugs are not only the most expensive, but also the best in terms of reliability. The cost seriously compensates for the service life of igniters with a platinum electrode - it is 4 times longer than the period of routine replacement. At the same time, the use of a rare earth metal reduces the effect of gasoline quality on the performance of the spark plug. In any weather, the UAZ Patriot engine with these igniters demonstrates improved response to the gas pedal. Starting from the lowest revs, the car becomes more dynamic, and gasoline consumption drops slightly. At idle, the engine runs without vibration and is so quiet that some users have developed the habit of listening - has it stalled? Only the price tag is considered by many to be high. In addition, the likelihood of purchasing a fake is much higher than with cheaper consumables.

Source

Choice

After the factory spark plugs on the UAZ Patriot wear out, they need to be replaced with new ones, but before changing them, you need to make a choice. Now there are a huge number of manufacturers, and design options, they can be:

• Silver;
• Platinum;
• Yttrium;
• Iridium.

therefore, the car owner may be confused at the sight of such a huge selection. It is recommended to consult with the seller before purchasing.

Before buying spark plugs for a UAZ Patriot, you need to figure out what engine is installed in the car. This SUV is equipped with a ZMZ-409 gasoline power unit with four cylinders and microprocessor injection. To achieve maximum results, it is recommended to fill in Euro-4 gasoline; the car works best with this fuel; filling fuel below this value is undesirable, as this can lead to negative consequences, for example:

• They will become slower to gain momentum;
• Candles will quickly become dirty and burn out;
• When accelerating, the valves begin to knock.

Based on the installed engine that is fueled with Euro-4 gasoline, you can choose those spark plugs that are designed specifically for this type of engine. Iridium and platinum are considered more durable and expensive; their minimum service life is about 70,000 kilometers.

It is also worth paying attention to plasma prechamber products as they have a number of positive properties, such as:

• Good self-cleaning;
• Long service life;
• A non-standard device, their body acts as a side electrode.

When choosing, in addition to the manufacturer, you should pay attention to technical data such as: clearance, length and thread of the product. For engines installed on UAZ Patriot, spark plugs that have the following parameters are suitable:

• Thread with a length of at least 19 mm, and M14x1.25;
• Built-in resistor;
• The gap in which a spark is formed is from 0.7 to 0.85 mm.

The product with such data is suitable for this type of engine. As a rule, A 14 DVR spark plugs or their equivalent are used.

The performance of spark plugs depends on high-quality fuel

There are a large number of modifications of power units for the Russian most popular UAZ Patriot. The manufacturer produces different engines that comply with Euro 4 standards. There is no classical production technology, so it turns out that there are no identical models. Each individual company improves the “product” it produces as it sees fit.

If you are faced with a situation where the spark plugs have worn out and it’s time to change them, don’t get lost, everything is quite easy if you have the right information and choose the right spark plugs, because the performance of an SUV engine depends on quality parts. Of course, you can take advice from a specialized store, but no one knows the car better than you.

Every UAZ Patriot, without exception, powered by a 409 engine, has the following characteristic features in the system:

• Multiprocessor injection.
• Work on gasoline.
• 4th cylinder.

The car's instructions separately talk about the power unit, and some recommendations from the manufacturer are indicated on it. The optimal fuel for an SUV is Euro 4 gasoline. This fuel allows the mechanism to operate correctly and for a long time. Naturally recommended fuel is the best for the engine, but it is not the only one. Of course, you can fill the Patriot’s tank with other gasoline, but the most important thing in this matter is quality. Bad fuel will lead to failure of the spark plugs and disrupt the smooth operation of the fuel system as a whole; the car owner must always remember this, otherwise the engine will break down.

What changes will happen if you fill the UAZ tank with another fuel:

• The spark plugs will become more dirty and burn out accordingly.
• The car will accelerate much more slowly.
• • When accelerating, a knocking sound will appear, which is completely absent during normal operation of the fuel system. Use the correct fuel for your car's engine; this is a basic requirement for every owner, otherwise you will need regular replacements.

Top 2. NGK BKR5E

Rating (2021): 4.39

The most popular choice NGK BKR5E-11 spark plugs are highly reliable, ideally suited to the UAZ Patriot engine, have a fair price and rarely fail during long-term operation, which is why they have earned high popularity among owners.

• Characteristics

  Average price: 170 rub.

• Country: Japan
• Electrode material: nickel
• Gap, mm: 1.1
• Heat number: 5
• Resource, km: 50000

These Japanese spark plugs are deservedly popular among domestic consumers, as they have proven themselves to be reliable and of high quality. After replacing standard igniters with NGK BKR5E, car owners note more confident, smooth engine operation without interruptions and excessive vibration. The best engine performance is achieved due to stable spark formation and timely ignition of the fuel mixture. Owners of UAZ Patriot who installed these spark plugs note a decrease in gasoline consumption due to efficient combustion. Judging by the reviews, this model always maintains the service life declared by the manufacturer and does not fail in cold weather. You can run into fakes on the market - for this reason, users often order candles in advance, through an official supplier.

Advantages and disadvantages

• Reliable
• Stable spark
• They take you into the cold

• There is a counterfeit

See also:

• 10 best tires for UAZ Patriot

Description of service

Engine maintenance is expected after 15,000 km. So, the engine holds 7 liters of engine oil, but when replacing it will only require 6 liters. The main oils recommended by the manufacturer and car enthusiasts are semi-synthetic, marked: 5W-30, 5W-40, 10W-30, 10W-40, 15W-40, 20W-40.

The maintenance card is no different from 409, and looks something like this:

1. 1000-2500 km or TO-0: oil and oil filter change.
2. 8000-10000 km - TO-1: oil change, oil and air filters, spark plugs, high-voltage wires, fuel.
3. 25,000 km - TO-2: oil change, oil filter.
4. 40,000 km - TO-3: oil change, oil and air filter, spark plugs, high-voltage wires, valve adjustment.
5. 55,000 km - TO-4: oil change, oil filter, fuel filter, timing chain and alternator belt replacement.
6. 70,000 km - TO-5 and subsequent: oil and oil filter change. Every 20,000 km the fuel and air filters are changed and the valves are adjusted. Every 50,000 km, replace the timing chain.

Every second maintenance requires checking systems such as the valve mechanism, the condition of the electronic powertrain control unit, and the functionality of sensors. The valve mechanism is adjusted after 50,000 km, or earlier if necessary.

Often, by 70,000, hydraulic compensators fail, which need to be replaced all together, since it is unknown when the functional ones will fail. The valve cover gasket is replaced every 40,000 km or when a leak develops from under it.

How to choose the right spark plugs for a Patriot engine

How stable and stable the engine operates depends entirely on the state the spark plugs are in. Also, the serviceability of spark plugs directly affects fuel economy, the power of the power unit, its so-called starting properties, and much more.

It is important to choose spark plugs, given that the car has a 409 engine. Let us remind you that high-quality products consist of alloys of platinum and another metal - iridium

The use of these modern materials allows us to produce very reliable structures. These spark plugs are therefore not cheap, but every driver will understand that they quickly pay for themselves. Their objective service life ranges from 60 thousand km or more.

Another equally bad option is also modern plasma-prechamber products. They have the following advantages:

• Long service life.
• Thanks to the correct shape, there is no need to adjust the gap.
• The self-cleaning process is much better.

When choosing the most suitable configuration, take into account, among other things, the material from which the candles themselves are made, the country of manufacture, plus pay attention to the length of the selected model, its gap shape and thread. For the domestic UAZ Patriot, spark plugs with the following parameters are ideal:

For the domestic UAZ Patriot, spark plugs with the following parameters are ideal:

• There is a built-in resistor.
• Length from 19mm.
• Thread dimensions must be M14x1.25.
• The gap for a spark with these characteristics is 0.7-0.85mm.

For the motor we are considering, A 14 DVR sections are perfect, you can also use analogues. Why are they best suited for the UAZ Patriot? Let us next consider the decoding of the product.

• “A” is the thread pitch, diameter. In our case it means M14×1.25. This design can be mounted to different sizes.
• “14” is a capital number, so to speak. An extremely important parameter that helps determine the temperature characteristics of the spark plugs.
• “D” - this parameter determines the length of the thread, which in our example is 19mm.
• “B” is the parameter of the insulator thermal cone protrusion. This equally important indicator is responsible for how quickly the spark plugs warm up after starting the engine.
• “P” - there is a built-in resistor. It is necessary in order to reduce the level of interference present for the electronic control unit of the power unit and radio equipment.

Top 5. BRISK DR17YC

Rating (2021): 4.07

14 reviews from resources were taken into account: Reviewer

The best combination of price and quality Many owners evaluate BRISK DR17YC candles as a product that has the most favorable combination of performance parameters and an affordable price. According to users, the ratio of these parameters is in the best proportion among the presented participants.

• Characteristics

  Average price: 77 rub.

• Country: Czech Republic
• Electrode material: iridium
• Gap, mm: 0.7
• Heat number: 17
• Resource, km: 40000

Many domestic cars, including UAZ, are equipped with BRISK DR17YC spark plugs, which are distinguished by their low price and optimal characteristics. Reviews about their quality vary mainly due to obvious defects or fakes. The presented candle has the best thermal conductivity, making it resistant to temperature fluctuations and loads. Suitable for both urban driving and high-speed driving on the highway. The engine with these spark plugs does not stall and runs quieter, but misfires and service life directly depend on the quality of gasoline. At a certain stage, whitening of the electrodes may occur, after which it is better to replace the spark plugs, since the destruction process is irreversible.

Advantages and disadvantages

• Low price
• Great resource
• They don't triple

• Electrodes turn white
• Marriage meets

See also:

• 5 best motor oils for UAZ Patriot

What kind of spark plugs are there from the factory?

Spark plugs ZMZ 405, 409 from the factory are Czech-made, Brisk brand. I will not further mention this manufacturer in vain, I will only say one thing. In all my “motor practice”, I have never been able to give these candles anything higher than a “three”, according to the school grading system. Let me explain. When the engine is “no good”, that is, like a ZMZ that came off the assembly line, these spark plugs barely serve out their time. But when it comes to something more serious: increasing the compression ratio, running on gas, boosting, problems begin. Uneven engine operation, misfires, etc. Therefore, the option of replacing factory spark plugs with the same new ones is not considered in principle.

Problems and common faults

Usually the ZMZ-409 begins to require serious attention at the turn of 300 thousand km. But it can start causing problems even earlier if it is operated in unfavorable conditions, without proper maintenance.

The main malfunctions on the UAZ “Loaf” with a 409 injection engine, a widely used example of a car with this engine:

• increase in gasoline consumption;
• reduction in engine power;
• pressure drop in the oil system;
• smoke from the engine compartment;
• tripping and unstable engine operation.

Engine problems arise for various reasons.

The engine won't start

The reasons for this may be:

• lack of gasoline pressure in the fuel rail;
• failure in the ignition system.

The fuel lines and tank should be checked, washed and purged if necessary. If the engine fuel pump is faulty, it must be replaced. Often a drop in pressure is associated with a clogged fuel filter that needs to be replaced. Another possible reason is a breakdown of the fuel pressure regulator, which can be corrected by replacing it.

If ignition problems are suspected, spark plugs, coils, armor wires and other components should be checked.

It is important to ensure that the ignition timing is set to the correct level.

Loss of motor power

• The engine throttle valve does not open completely. The damper drive needs adjustment.
• The DPS (damper position sensor) is broken and should be replaced;
• low pressure in the fuel rail - see above;
• the air filter is dirty and needs to be replaced;
• ignition problems;
• The valve clearances are broken; they should be adjusted;
• low compression due to a breakdown of the cylinder head gasket, burnout of the engine pistons or malfunction of the piston rings, valve misalignment, wear of the cylinders/rings.

The engine suddenly stalls or runs erratically

• drop in gasoline pressure;
• breakdown of the idle air control;
• loss of tightness in the intake system, air leaks.

Low pressure in the oil line

Possible engine malfunctions and problems leading to this:

• incorrect type of oil poured into the engine;
• gasoline or coolant entering the crankcase, followed by foaming (a dangerous phenomenon; the cause of the leak must be eliminated as soon as possible and the oil replaced);
• wear and contamination of the oil pump (it should be washed and, if necessary, replaced);
• contamination of the oil filter (the solution is to replace it);
• the gap between the bottom of the crankcase and the oil receiver is too small, damage to the latter. The crankcase needs to be restored to its original geometry or replaced;
• There is too much clearance between the crankshaft journals and the bearings. It can be solved by replacing the engine bearings and grinding the journals;
• clogging of BC oil lines, cracks in the cavities of the oil line. “Treatment” – repair of the BC or its replacement.

Knock of crankshaft bearings

A metallic knock is heard when the gas pedal is sharply pressed in idle mode, the knocking becomes more frequent as the engine speed increases. Possible reasons:

• Oil pressure has dropped, engine parts are starved of oil. The cause must be found and eliminated;
• increasing the gap between the engine crankshaft liners and journals. The necks need to be polished and the bearings replaced.

Knock from the piston block

It is caused by the beating of the pistons against the cylinder walls, is well detected under load at low speeds, and is of a muted nature. Causes:

• large gap between cylinder and piston. The problem is solved by replacing the pistons with simultaneous boring of the engine cylinders (and honing them);
• If the knocking is caused by a large gap between the piston grooves and the rings, the latter or the pistons complete with rings should be replaced.

High oil consumption

• leaks through engine seals;
• clogged crankcase;
• problems with the piston, rings, valve stem seals.

Read more: Starline b92 key fob operating instructions

Motor vibration

• engine crankshaft imbalance (balancing required)
• valves that need clearance adjustment;
• wear of engine mounts;
• The crankshaft pulley has become loose.

Engine overheating

Caused by malfunctions in the cooling system: the coolant level and the general condition of the system should be checked.

Replacement

Let's look at how spark plugs are replaced and what this process is. Everyone knows where these elements are located, so let’s proceed to directly extracting all 4 candles:

1. Initially, the tip with the seal is removed.
2. Using a spark plug wrench, unscrew the product until it is completely removed from the cylinder.
3. If this element is found to be damaged, chipped, cracked or dirty, the product will need to be replaced.

Before replacing the product with a new one, you should check for carbon deposits on the work area. If the deposit is black, then this indicates that the engine is running on an over-rich mixture, and if the color is too light, it indicates an over-lean mixture. The normal operating color is light brown soot, which indicates the correct functioning of the motor. In this case, the gap may be compromised.

If only one of four products is damaged, it is recommended to replace these elements as a whole. Any failures negatively affect the operation of the engine, so monitor the operation of the spark plugs and periodically replace them, even if there is no reason to do so. The optimal service life of factory products is considered to be 15-20 thousand km.

Tips and tricks for replacement

To replace parts, you will need a spark plug wrench; before dismantling, you should disconnect the power supply cables equipped with a rubber tip. Then the parts are unscrewed using a tool, and the electrodes are visually inspected. During normal operation of the ignition system, the surface of the electrodes has a light brown tint. The appearance of carbon deposits indicates incorrect engine operation. The manufacturer recommends changing the spark plugs after a run of 20 thousand km; further use of the parts negatively affects fuel consumption.

Spark plugs ZMZ 409

Spark plugs have a significant impact on the stability and stability of the UAZ car engine.

That is why it is important to know which spark plugs are suitable for the ZMZ-409 engine and its modifications

The serviceability of the spark plugs and, accordingly, the uninterrupted spark formation directly affect the power, fuel efficiency and starting properties of engines, as well as the degree of toxicity of exhaust gases and some other parameters.

According to the factory operating manual (refer to the links below) for the maintenance and repair of the ZMZ-409 engine, it uses A14DVR spark plugs or their foreign analogues, which can be easily selected on the manufacturers’ official websites or in their catalogs.

RE - ZMZ 409.10 link to file

RE - ZMZ 40905.10 link to file

Explanation of the name of the spark plug and comments on their characteristics.

For a more complete understanding of the essence of the issue, using the example of the A14DVR spark plug, let's decipher its name: A - diameter and thread pitch D, 14 - heat rating, D - thread length L, B - protrusion of the insulator thermal cone, P - presence of a built-in resistor in the spark plug.

A - diameter and thread pitch D - in this case means M14x1.25 thread. The absence of the second letter indicates that the size of the hexagon of the spark plug S is made for a 21 mm wrench. From experience - in narrow spark plug wells of the ZMZ-409 engine, when replacing spark plugs, it will be much more convenient if it has a 16 hexagon rather than a 21 hexagon. The size of the hexagon does not in any way affect the other parameters of the spark plug, so there is freedom of choice here.

14 - heat number - an important parameter that determines the characteristics of the temperature regime of the candle. More about this - Heat number of spark plugs. Cold and hot spark plugs.

D - thread length L - in this case means the length of the threaded part is 19 mm.

B - protrusion of the insulator thermal cone - the thermal cone of the spark plug protrudes from the body into the combustion chamber. The protrusion of the heat cone beyond the end of the housing accelerates the heating of the spark plug after starting the engine, which increases its resistance to carbon formation.

P - the presence of a built-in resistor in the spark plug - determines the presence of a resistor (electrical resistance) in the circuit of the central electrode of the spark plug. The resistor reduces the level of interference for radio equipment and the electronic engine control unit. The presence or absence of a resistor in the spark plug does not in any way affect the quality of spark formation.

Spark plug spark gap.

Another characteristic of a spark plug that the manufacturer sometimes does not indicate in the marking is the gap between its central and side electrodes. For the ZMZ-409 engine it should be within 0.7-0.85 millimeters. Before installing the spark plug, you need to check the size of the gap and, if necessary, adjust it by bending the side electrode.

The size of the gap between the spark plug electrodes directly affects the process of ignition of the air-fuel mixture in the combustion chamber. Therefore, if the gap is incorrectly set, for example too large, the load on the high-voltage part of the ignition system increases, which in most cases leads to a loss of engine power and increased fuel consumption.

Which spark plugs are suitable for the ZMZ-409 engine in a UAZ.

Based on the above decoding for the A14DVR spark plug, we conclude that all spark plugs from any manufacturer that meet the following requirements are suitable for operation in the ZMZ-409 engine:

— thread M14x1.25, length 19 mm. and with a hexagonal spark plug wrench 16 or 21 mm. — the heat number corresponds to the number “14” of the A14DVR spark plug, this is easily determined from the tables of correspondence and interchangeability of spark plugs from different manufacturers — the heat cone must protrude from the spark plug body — the spark plug must have a built-in resistor — the spark gap must be within 0.7- 0.85 mm.

Interval for replacing spark plugs on the ZMZ-409 engine.

The Ulyanovsk Automobile Plant recommends changing spark plugs every 30,000 kilometers or every two years, whichever comes first. Considering that the service life of spark plugs is not constant and largely depends on various components: the quality of their manufacture, engine operating conditions, fuel quality, etc., it would be advisable to replace them every 10,000 - 15,000, or even better once a year, before during the winter period of operation.

Top 3. EZ AU17DVRM

Rating (2020): 4.17

23 reviews taken into account from resources: Reviewer

Best price AU17DVRM - the most affordable spark plugs for UAZ Patriot. The closest competitor, BRISK DR17YC igniters, are 10% more expensive.

This is the case when a low price tag does not affect the performance of spark plugs at all. AU17DVRM are manufactured under BOSCH license, and the use of high-quality equipment and a strict quality control system determined the high performance characteristics of the product. There are practically no fakes due to the low price. Despite the indicated resource, spark plugs in UAZ Patriot can last much longer. Their survivability largely depends on the quality of gasoline, so you can often hear from users about mileage of 40 thousand km on one set. There are some drawbacks - it is necessary to adjust the gap before installation, as it can differ even in the same package. It is also impossible to determine when a spark plug will fail - it is better to always have a reserve for replacement.

Advantages and disadvantages

• Affordable price
• Work normally
• Lasts longer than advertised

• May suddenly fail
• Different gap between electrodes
• It is impossible to determine the degree of wear

Cooling system

The ZMZ 409 engine is equipped with a liquid, closed, forced cooling system. The system is presented in the form of a water jacket on the cylinder block, on the cylinder head, a water pump, as well as a thermostat, coolant temperature sensor, and ambient heating sensor.

The ZMZ 409 engine provides the most optimal thermal regime within 80-90 degrees. It is maintained by a thermostat. It works automatically. The correct temperature conditions make it possible to make the UAZ SUV unpretentious in maintenance. The engine of the 409 model is highly efficient, and its parts are extremely wear-resistant.

To keep the driver calm and the ZMZ 409 engine not to overheat, engineers placed an emergency temperature light on the dashboard. The indicator will work if the temperature goes beyond 104 degrees. The sensor is located on top of the radiator tank. You need to make sure that the engine does not overheat, otherwise the 409 engine will need to be repaired.