Often in the automotive community you can hear a variety of opinions about the life of the spark plugs. Some are confident that the candle on average can pass about 20,000 km. Another group of car enthusiasts is confident that it can be easily driving even 100 thousand km. Professionals cannot come to one opinion, because there is no unambiguous answer to this question. Still, how often do you need to change the spark plugs? This can be done according to the regulations of the car manufacturer or the wear of the parts themselves.
Also, these elements are changed on the basis of their actual state. To date, these are some owners are confident that it is necessary to follow the recommendations of manufacturers with all severity. Others believe that if the condition of the candles is normal, and the motor is started at any temperatures, then they must be changed not earlier than 90 thousand km. It is necessary to find out how often the ignition candles can be changed and what can happen if this is not done. And let's start to understand this issue from the very beginning.
Why Motor Candle
These are necessary for creating a spark by which the fuel mixture will flamm in the engine cylinders. The process of ignition passes by means of a high-voltage discharge between the two electrodes.
How the Ignition Candle is arranged
It consists of several parts. The contact output is needed to connect the device to the high-voltage line. Also in the composition you can detect an insulator, the function of which is to protect the part from overheating. The insulator ribs are designed to prevent breakdown over the entire surface of the part. Between the side and central electrode just goes well and spark. Also in the device there is a special seal, which prevents fuel from entering the combustion chamber into the motor housing.
Characteristics
The item can have a lot of characteristics, but the most important of them is the size of the gap between the electrodes. It is from this magnitude that the effectiveness of a faithful mixture is depends. The greater the clearance, the more powerful it will be spark. Also with a good spark zone of ignition will be larger. This is the key to a stable fuel consumption and smooth operation of the motor. If the clearance is small, then the spark appears earlier than it is necessary, and the breakdown will be held at smaller stresses. This reduces the power and efficiency of the power unit.
Also another important characteristic is a caliper. This digit shows the maximum temperature loads. Domestic products have numbers 8, 11, 14, 17, 20, 23, 26. European and American manufacturers of such scales do not adhere to. Import products are divided into hot and cold candles.
If you set too cold, with a high caliliest number, they will be badly self-charge and interruptions will appear in the engine. After how much it depends on the status of the details and manufacturer's recommendations. Overhead item can cause a caliper ignition. This is capable of leading to sufficiently destructive consequences, which externally resemble detonation.
Material and resource
Before finding out how often the ignition candles can be changed, it is necessary to share all devices on the market into two groups. These are platinum or iridium and simple. Candle works in a closed knot, and without removing it is impossible to estimate its level of wear. Automakers advise to replace during a planned technical inspection. This usually occurs every 10-15 thousand kilometers. The procedure is relevant for simple candles. But often such a resource also indicate for expensive products. Most likely, in this way, service centers can earn on their replacement. It is best possible to understand when changing the spark plugs, as of the details.
Car owners with extensive experience determine the depreciation by kilometer. So, the replacement should be made every 20-30 thousand km. If you open a catalog of a respectable manufacturer, then it is indicated when changing the spark plugs. For simple devices, it is 20 thousand km, and for platinum - 100 thousand km.
These figures may vary depending on the quality of the fuel, as well as on the state of the power unit. There are situations when due to the permanent use of poor-quality fuel, candle electrodes burn earlier than their term. The driver will feel uneven operation of the motor, falling traction. Another extreme - when the car works on ordinary candles about 80 thousand km, and the owner does not even realize that the car lost in power and raised appetites. On the question of how much ignition candles need to be changed, any new answer is difficult to give. It should be proceeded from that resource that takes the manufacturer.
Signs of wear
Before contacting the official service, determine what time it is time to replace the candles, it is possible by jerking and vibrations when driving. Often before the trip to the diagnostics you can see the details on your own. This is relevant if they are easily removed. When changing the spark plugs, you can understand their appearance, as well as on other characteristics.
Checking the gap
First of all, pay attention to the gap and the availability of Nagar. Each candle has a label where the type of device and the size of the gap is specified. This is the latest figure. It is usually indicated in the latter marking, and is indicated by this indicator in millimeters. If a really existing gap is more than the one that is specified in the marking, the part must be replaced.
Nagar.
The perfect option is the complete absence of Nagara. When the combustion process passes correctly, the electrodes have the property of self-cleaning. On the candle there may be a black or white chicken. It does not depend on the quality of the candle, but indicates an incorrectly exhibited ignition. 
If the color of Nagar and the general view of the candles differ, then should be remembered, after how much the ignition candles change. Naturally, all the candles must be replaced.
Type of ceramic isolator
Cracks may appear in it. If they are, then they can be filled with brown bloom. This is a defect, and ideally the whole kit must change. All recommendations are designed for running. If it is 20 thousand kilometers for ordinary and 100 for platinum, then you can safely replace these items with a complete set. As for the question, through which mileage to change the spark plugs, then the manufacturer's recommendation should be used.
What will happen if not to replace them
If the auto owner for some reason missed the replacement time, then this will not lead to tragic consequences. But in the most necessary and urgent moment when the car is needed right now, the engine will simply refuse to start. Therefore, it is so important to remember, after how much I can change the spark plugs so that there are no unpleasant situations.
Signs of non-working candles have already been considered, and if you ignore these symptoms, you can spend a round sum for repairing the engine. Among the tragic breakdowns - detonation in the cylinder. As a result, a shock wave arises, which is able to force to restrict and the entire charge in the cylinder. When it is reflected from the wall of the combustion chamber, you can hear the characteristic metal ringing. 
If the detonation is rather strong, then the motor loses power, and the ball is black smoke. The engine is experiencing strong loads. The edges of the pistons, as well as the engine can be mounted. The shock wave can also cause elevated cylinder wear. That this does not happen, you need to remember when changing the spark plugs. And then the car will delight its owner.
So, we found out, after how many kilometers and in which case the car owner it is necessary to change the spark plugs. We hope this information will be useful for you.
