Very often, problems with a car engine arise due to the fact that the gap between the electrodes in the spark plugs is incorrectly set. This situation is often provoked by the fact that the manufacturers of these parts in most cases declare that there is no need to adjust the gap in the spark plugs. But this statement is completely wrong and unfounded, therefore it will not be superfluous for each car owner to know how to check and adjust the gap in the spark plugs.
Video
The video will tell about spark plugs for Nexia
Clearances
It is clear that if, for example, there is no spark on the ignition coil, then the gap in the spark plugs has nothing to do with it. But all the same, this value has an important effect on the operation of the engine. In order to better understand this, one should consider the processes that occur in the combustion chamber when the air-fuel mixture is ignited by a spark. At this moment, the filling of the cylinder is compressed by means of the piston. In this case, the hydrocarbon-air mixture is compacted to the limit and in order for the spark to pass successfully through such a dense substance, a potential difference is needed.
Why is spark plug gap adjustment important?
In standard gasoline engines, the ignition system is designed in such a way that it can work normally only if all parts of the mechanism are in good working order. In particular, it will not hurt you to know how to check the coil, how to diagnose the generator, because each of these nodes affects the engine's performance.
And even a small violation in all this complex mechanism, for example, carbon deposits on candles, can cause not only deterioration in engine performance, but also its breakdown. As for the gap in the spark plugs, for example, if its natural increase has occurred, the spark may simply not have enough power to break through the dense mixture of air and hydrocarbon. Naturally, more energy will have to be spent on breaking through and, as a result, the ignition of the spark decreases, which in turn, in most cases, reduces the engine power.
When studying the work process car candles ignition, we often have to deal with some still not fully investigated factors. That is why if the question arises "which candles should be put on your car", the answer must be unambiguous - the original ones recommended by the manufacturer. It is also important to periodically check the candles, which involves determining the size of the gap and adjusting it if necessary. As a rule, each engine manufacturer gives recommendations on the required clearance and it is better to follow them, this is the only way to guarantee high-quality operation and complete engine serviceability. 
Experienced drivers who already have a clear understanding of the design of spark plugs, changing the gap in the spark plugs, can affect the power and operation of the engine. But it should be remembered that an incorrectly set clearance can negatively affect engine power and fuel consumption, and will also mediocrely cause an increased load on the crankshaft and piston system.
It should also be noted that in older engines, the spark plug gap is not as important as in modern ones. In the operation of the latest engine modifications, the most compressed mixtures are used, and therefore the requirements for the accuracy of the clearances are very high. For example, breaking the spark plug gap on a four-stroke, two-liter, four-cylinder, eight-valve engine by only 1/5 millimeter will increase fuel consumption by 4% and result in a loss of engine power by about the same.
You can check and adjust the gap in the spark plugs as in service center, and independently. It is best to follow the manufacturer's recommendations or the advice of an experienced motorist to properly set the gap. Do not forget that at least every 15 thousand kilometers this procedure must be repeated. This is the only way your car will always be in order and will delight you with the maximum speed and power.
Spark plug gap
The gap between the spark plugs is very important, since if the gap is too large and too small, the spark size changes, which leads to a decrease in the efficiency of the engine. The clearance must always be within the specification. 
When the air-fuel mixture burns, the spark plug electrodes are slightly burned. This is also facilitated by a spark discharge, which knocks out metal particles from the electrodes, as a result of which the interelectrode gap increases with an increase in the duration of the spark plugs.
To breakdown too large an interelectrode gap, a higher voltage is required, which can lead to misfires, or the engine will not be able to start at all. Therefore, it is necessary to check in a timely manner and, if necessary, correct the gap.
The gap is checked with a wire gauge or a feeler gauge, and corrected by bending the side electrode. The gap should be between 1.0-1.1 mm.
Diagnostics of the engine condition by the appearance of the spark plugs
By the appearance of the spark plugs, you can approximately judge the state of the engine, deviations in its operation from the optimal parameters. The check must be carried out after thoroughly warming up the car engine on the high-speed highway. Checking after driving a short distance may produce erroneous results. Carefully inspect the top of the center electrode insulator heat cone and the side electrode while checking. 
Light gray or brown color insulator cone
indicates that the fuel injection and ignition systems are operating normally to keep the engine running economically.
Large deposits indicate the use of inappropriate grades of fuel or engine oil. If possible, change the brand of motor fuel and, accordingly, oil.
Large soot deposits appear when the engine is frequently used for short-distance travel and does not warm up to normal operating temperature, the combustion temperature of the fuel does not match that at which the carbon monoxide content rises.
The white color of the insulator cone indicates that the engine is operating with a too large ignition timing ( early ignition), which is typical for violations of the ignition timing and knock sensor operation.
Melting of the central and side electrodes - indicates that the glow plug number of the spark plug does not correspond to the required one, the operation of the ignition timing adjustment and the knock sensor is impaired, or the cooling system operation mode is impaired.
Destruction of the upper part of the insulator cone - indicates that the air-fuel mixture burns with detonation due to a violation of the ignition timing adjustment, the knock sensor operation, the operating mode of the cooling system or the depletion of the air-fuel mixture due to possible air leakage.
A yellow deposit on the top of the insulator cone - appears when additives in the fuel burn out or engine oil... They melt when the engine is running at maximum loads, forming a conductive layer, as a result of which misfires can occur. After a large number of short journeys, it is not recommended to immediately run the engine at maximum power.
Oil layer on insulator cone and electrodes - deposits when worn piston rings, valve guides or valve stem seals.
Output
If appearance spark plugs Daewoo Nexia no deviations, but the engine is not working, perhaps the spark plugs are defective. Invisible cracks in the insulator when starting a cold engine can fill with fuel, which deflects the spark. In addition, sparking can be impaired under pressure, although the spark plug works normally outdoors.
For engine internal combustion spark plug - important element without which power unit will not work. Over time, the efficiency of the ignition elements deteriorates. As a result, an urgent replacement is required.
When is it necessary to replace candles in Daewoo Nexia?
Russian auto repairmen advise replacing spark plugs with Daewoo Nexia every 15 thousand kilometers. This is explained by the low quality of fuel and the harsh Russian climate. Note: the ignition element can withstand high loads. A quality ignition element cannot be cheap. If the ignition element is faulty, the instrument panel may light up Check light Engine.
It is recommended to replace it in a timely manner. This will reduce the cost of purchasing additional faulty equipment and fuel (gasoline consumption with faulty ignition elements increases significantly).
Visual diagnostics of spark plugs:
- The presence of mechanical damage in the form of carbon deposits, breakdowns, etc .;
- Checking the gaps between the electrodes. The distance should be within the factory values. For four-cylinder engines, the clearance should be approximately 0.7-0.9 mm.
- The presence of molten electrodes. It occurs due to overheating of the power unit, setting the wrong ignition timing, etc.;
- Formation of an oily coating on the surface of the spark plug element and electrodes. The rings or valve stem seals may have been damaged.
Differences in spark plug types
Candles are distinguished by:
- The number of electrodes;
- The material that was used in the manufacture;
- Heat number.
Budgetary standard candle most common. It boasts a small resource. The electrode is made of heat-resistant metal. Over time, signs of wear appear. Low cost allows them to be changed periodically, without thinking about quality.
Multi-electrode plugs... They have several side electrodes. The resource of such parts is significantly increased.
Pros of multi-electrode:
- The spark appears at the right moment;
- The fuel burns out without residue;
- You can use a lean mixture;
- Minimizing the release of hazardous waste into the atmosphere.
Platinum and iridium candles... They appeared not so long ago.
Properties:
- The central electrode is up to 0.7 mm thick;
- The lateral electrode is pointed and has a special profile.
Benefits of Platinum and Iridium Candles:
- Long service life;
- Self-cleaning effect.
How to independently change spark plugs in Daewoo Naxia?
Before starting the procedure for replacing candles on a Daewoo Nexia 16 valves, you need to prepare. You will need to study safety techniques and select the necessary tools that you will need for work.
Safety rules:
- The vehicle must be de-energized. Disconnect the negative terminal of the battery.
- You need to work with gloves. This will eliminate the likelihood of burns and protect against minor injuries: accidental scratches and small blows.
- The procedure should be carried out only after the engine has cooled down. After driving, you must wait up to one hour for the engine temperature to drop to acceptable values. note: The spark plugs are very hot. Be careful.
Required tools and materials:
- Candle wrench;
- Screwdriver;
- New ignition elements;
- Clean rags;
- Brush for cleaning dirt from the surface of the spark plug element.
Step-by-step instructions for replacing candles:
- Open the hood.
- Dismantle the spark plug tips. Do not pull or pull the wires. They can break off.
- Remove ignition elements. Place next to cylinders. By the amount of carbon deposits on the candles, a problem cylinder can be identified. Please note that loosening may cause problems. As a result, the threads can be damaged. We'll have to start the power unit, warm it up and try to unscrew the ignition elements again.
- When installing new parts, remember that cold parts cannot be screwed into a hot engine. In the future, it will be impossible to unscrew.
- The tightening torque is 20 Nm. The force can be determined using a torque wrench.
- Collect everything in reverse order.
The procedure for replacing spark plugs in Daewoo Nexia 16 cl is completed.
Nexia worries every car owner, since they belong to consumables that are technical regulations models must be changed every 10,000 km. Moreover, their selection should be treated with full responsibility. A candle bought without taking into account the manufacturer's instructions often turns into the very "pig in a poke", which leads to unpleasant consequences. It becomes the main reason for poor engine start at the slightest frost, leads to an increase in fuel consumption, and negatively affects the dynamics of the car.
What candles are optimal for Daewoo Nexia 8 valves, the manufacturer himself suggests. "Native" for a machine with a SONS motor coming off the assembly line are products manufactured by the famous Japanese company NGK. The main advantage of the products of the luminary, who has dominated the spark plug market since 1936, is the maximum compliance of the plug parameters with the main characteristics of the combustion chamber. Which include:
- working temperature;
- pressure;
- type of gasoline.
Therefore, when choosing a plug for a service replacement, first of all, you should pay attention to the marking.
The heat rating and the gap between the electrodes, which are constantly in the area of high temperature and pressure, are the most important indicators of compliance. It is on them that the optimal ignition rate of the mixture and a quick start depend.
Car manufacturer - Daewoo Motor Corporation strongly recommends a spark plug for the 8-valve SONS engine ignition NGK R BPR6E with original number 94837756. This is a safe bet for gasoline engines operating normally without overloads.
The decoding of the letters BPR6E reads:
- ВР - the thread diameter is 14 mm, the size of the hex key is 21 mm.
- R - means that the candle is equipped with a radio interference suppression system.
- 6 is the magic number.
- E - shows that the length of the threaded part is 19 mm.
The absence in the marking of the parameter of the distance between the electrodes implies that the gap meets the brand standard and is equal to 0.7-0.8 mm.
What other candles can I put on Daewoo Nexia?
The Champion RN9YC mixture ignition devices, produced by the American concern of the same name, are an excellent replacement for NGK R BPR6E and come under the same number 94837756. And although they have some differences in marking, in fact, they are the same NGK:
- N - indicates the same thread diameter and key size - 14 mm and 21 mm;
- 9 - the value of the glow number;
- Y and C - emphasize the characteristic features of the brand. Y indicates that the protrusion of the spark plug insulator extends beyond the housing. C - that its core is covered with copper.
Many owners of Daewoo Nexia with an 8-valve engine also choose the eminent spark plugs German manufacturer BOSCH. There is no need to doubt their quality. They are very similar to the Champion RC9YC. The only difference between the brands is the glow number, which in BOSCH candles is 7 units.
Iridium or Nickel? Which candle to buy?
As for the question of which candles are better to buy for Daewoo Nexia, iridium or ordinary, this is an individual choice of each driver. The progressive iridium candle lasts longer, needs to be changed less often, but its cost is much higher than the regular one. Every innovation, like a medal, has two sides. But whatever the candle, nickel or iridium, the same requirement is put forward to it: the glow number should be in the range of 6-9 units.
Everyone chooses everything in this life for himself. Choose, buy for your favorite best candles and travel with pleasure! A steady spark and an easy start!
The selection of spark plugs for the 8-valve Daewoo Nexia engine can only be carried out according to the manufacturer's instructions. Nevertheless, a thoughtless purchase of a seemingly similar candle in the nearest store can turn into not only a waste of nerves if it is refused to start with minimal frost, but it can also negatively affect both fuel consumption and the dynamics of the car. Let's understand this issue in more detail.
The manufacturer chooses the parameters of the spark plug based on the parameters of the combustion chamber - pressure, type of gasoline and operating temperature.
In the specific conditions of the combustion chamber of the 8-valve SONS engine, it is very important to select the required glow plug number. This is a conditional parameter characterizing the pressure at which the mixture self-ignites, without a spark. Western companies are slowly moving away from this parameter, conventionally dividing candles into hot and cold ones. Cold candles are screwed into forced sports engines and the hot ones go to everyone else gasoline engines working without extreme loads.
Marking
Daewoo unconditionally recommends using a candle in the 8-valve SONS engine NGK R BPR6E (catalog number 94837756 ). A worthy alternative is the Champion candle RN9YC... To understand what's what, let's take a closer look at the marking of these candles. And at the same time, we will select worthy replacements, according to the stated parameters. By NGK marking:
- BP- the diameter of the threaded part is 14 mm, the size of the wrench is 21 mm;
- R- a resistance is built into the candle to suppress radio interference;
- 6 - glow number;
- E- length of the threaded part - 19 mm.
The gap between the electrodes in this candle is not indicated (it is indicated last), therefore, it should be standard - 0.7-0.8 mm.
Champion RN9YC
Original spark plug Champion RN9YC for 8-valve Daewoo Nexia.
Standard Champion RN9YC marking means the following:
- R- built-in resistance;
- N- thread diameter 14 mm, turnkey 21 mm;
- 9 - glow number;
- Y- the heat-dissipating cone protrudes beyond the body;
- WITH- core coating material - copper.
Condition of "champion" candles after 14,000 km of run.
Nickel and iridium candles, is it worth it?
In addition to the standard ones, there are candles on sale with nickel or iridium plating or with electrodes made of iridium alloys, there are also more expensive ones made of gold and silver alloys.
In principle, such candles should last an order of magnitude longer than standard ones. If the classic candle requires replacement after 50-60 thousand, then the iridium one can leave both 100 and 120 thousand km. Summing up, let's say that a candle can be even made of platinum, but its glow number must be within the limits allowed by the manufacturer (6-9). Easy launches for everyone and a stable spark!
Video on how iridium candles differ from ordinary ones
In the electronic ignition system, which is one of the most important components modern car, high voltage current is generated and distributed thanks to electronic devices... The electronic system has many distinct advantages and also makes it easier to start the engine in winter.
differ depending on the car model. The electronic control unit processes the signals from the input sensors, acting, in turn, on the igniter. The igniter, which is based on a transistor, is a kind of electronic board that turns the ignition on / off. When the transistor is on, current flows through the primary winding of the coil. If the transistor is closed, it is cut off, and the current is induced through the secondary winding of the coil. The electronic ignition system can have different coils: one common, individual or twin. Common coils are used in systems that have a valve. Individual coils are installed directly on the candle, therefore high voltage wires in such a system are not used. Twin coils are used in direct ignition systems. If the engine has four cylinders, one coil is installed on the 1st and 4th, as well as on the 2nd and 3rd cylinders, each of which is responsible forIgnition systems: from simple to best!
The ignition system is an integral part of any petrol or gas engine. With all the variety of technical nuances in this matter, all ignition systems with a dynamic distribution of the supplied voltage can be divided into contact and non-contact. The following article is devoted to their main features, as well as the reasons for the emergence of systems with static voltage distribution (electronic ignition).
This switch. Initially, such units had extremely low reliability (sometimes even less than 10 thousand km.) However, in the process of design improvements, this parameter was brought to a more or less acceptable level. Contactless ignition systems made it possible to reduce fuel consumption, make it easier to start the car in the cold season, increase engine torque at low speeds and its power at high speeds, as well as somewhat reduce harmfulness exhaust gases due to increased spark power and more complete combustion of the fuel-air mixture. Nevertheless, the ignition timing was controlled using physical sensors that are part of the distributor. Interrupter-distributor ("distributor") The interrupter-distributor of ignition, also known by motorists under the name "distributor", is an integral part of both the contact and contactless systems ignition, even if in the second case its design is somewhat different
