That’s why spark plug replacement is carried out at 3-4 MOTs, namely 45,000-60,000 km. If you don’t replace the spark plugs in time, or if you don’t adjust the gap correctly, the ignition coil may fail (because it needs more strength to “break” the large height between the electrodes). This happens because the middle and side electrodes lose some of their metal, they just burn from the constant discharge. Over time, this is usually 50-80,000 km, the size of the electrodes becomes smaller, the gap increases and the coil cannot effectively spark (it turns out to be weak), the car is not attracted, and fuel consumption can also increase. The center electrode is made of an iron-nickel alloy with the addition of copper and chromium.įrom the factory, not only the gaps are strictly defined, but also a certain resistance is selected (around them a little lower) so that the ignition coil can “break through” and provide the necessary strong spark.Typically, the side electrodes are made of steel combined with manganese or nickel.They are the ones that wear out over time and the elements themselves need to be replaced But we need to understand that the main load is carried by two electrodes – central and lateral (a spark passes between them). Now I will not go into detail about the work of these elements. I will have a separate article on this, so be sure to follow my blog.Īs you can see, metals were almost ideal for use in the combustion chamber, if not for the price. But the platinum variants (for example, BOSCH Platinum) have a center electrode that is completely platinum, but very thin, which locks (as if poured) into a dense ceramic insulator.Īlthough in fairness it should be noted that some manufacturers call the iridium option platinum, or cover the point of contact with platinum using a similar technology to iridium (this is not the point now). This is not quite true, of course, iridium is a metal of the platinum group, but it is a transition element, and the method of production is slightly different (we will talk about it below). Others write that nothing changes at all, and the motor works even worse! WHERE IS THE TRUTH? I have experience with such an element, and therefore there is something to tell and show, let’s think about the pros and cons.Īt first I wanted to tell you a little about iridium and platinum. However, if you read reviews on the Internet, then opinions will be completely different! Some people write that this is a “miracle miracle” with all the advantages I have mentioned above (and the service life is also great).
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