Carbon deposits in modern engines. Look where he comes from and how to prevent sediments

The most frequent causes of varnish in modern engines

Carbon deposits in modern engines. Look where he comes from and how to prevent sediments

One of the biggest problems of modern engines is the accumulation of carbon deposits, which impairs their work and even leads to serious malfunction. Most often carbon deposits formed in modern engines with direct gasoline injection. That’s why this is happening and how to prevent it.


Where is the soot?

Carbon deposits in modern engines. Look where he comes from and how to prevent sediments

The formation of deposits of carbon caused by many factors and is characteristic for all types of internal combustion engines – petrol and diesel, aspirated and turbocharged, with indirect and direct fuel injection.

Deposits in the engine result from the imperfect combustion of the fuel mixture. For example, in engines with direct petrol injection one of the causes of carbon deposits is the way fuel injection – petrol in this case doesn’t wash valve and goes directly into the combustion chamber. This causes a build up of deposits on the valves and, hence, limits over time, the oxygen in the combustion chamber, which in turn leads to incorrect combustion of the fuel mixture.


If you look at the issue more widely, it is easy to detect and other indirect causes for the appearance of soot in the engines of cars. They are connected with the fact that in recent years, the majority of motorists have changed the way of using the car. Today more and more people operate a vehicle as a Bicycle, public transport or short walks/trips to the store.


– Most large deposits build up in engines of vehicles operated in the city, at short distances. No matter what make and model it is. An important usage of vehicle: low speed, low operating temperatures, the use of the car without warming up the engine – that’s the main formula that guarantees the rapid emergence of carbon deposits in the engine, – the expert explains “Profmetallservis” Vladimir Drozdovsky.


Carbon deposits in modern engines. Look where he comes from and how to prevent sediments

Plus add to this the fact that many modern petrol engines are now often equipped with turbo, this means that a turbocharged car in city mode most often used for low engine speeds. In the upper rpm range turbo today rarely used in the city. But even beznadziejnie modern engines with direct gasoline injection also do not encourage owners to drive at high speeds. The fact is that today’s naturally aspirated engines well generate a high torque at low rpm. Accordingly, car owners no longer need to commute at high speed. This is a significant difference masturbing modern engines from the engines of 20 years ago.


Unfortunately, due to the lower revs the modern engines warm up longer (plus don’t forget that many engines are now aluminum which quickly loses its heat temperature, unlike the old cast iron), and low speed does not allow a natural way to remove engine carbon deposits. In the end, in the power unit at various parts begin to accumulate sediments.


Carbon deposits in modern engines. Look where he comes from and how to prevent sediments In the past, up to 2000 rpm, it was impossible to drive, even with constant speed. Today during acceleration you do not need to exceed. Hence, a large accumulation of deposits in the engine.


Another reason for the formation of carbon – it is the wrong oil change and delays in servicing of the engine. For example, the main enemy of any internal combustion engine is to increase replacement intervals of the engine oil. It is known that the longer changing the oil in the engine, the more it is formed by-products. Unfortunately, today many manufacturers deliberately increased their service intervals for oil change. For example, many manufacturers have increased the oil change intervals with 10 thousand km up to 15 thousand km (in Russia).


In their view, modern design engine, electronics and quality synthetic oil will harm the engine to use engine oil for 15 thousand km, Some manufacturers have gone further, extending the service interval to 20 thousand. km. A view on the recommendations of the manufacturers in Europe and you will be surprised. There compared to Russia service intervals for oil change increased even more – up to 25 thousand km and even 30 thousand km!


But we have already told you why you shouldn’t listen to the dealer and the factory, strictly following the recommendations for changing the oil. In most cases, you need to understand that the manufacturers ‘ recommendations relate to the overall light duty vehicle. If you use the car mostly in the city, once can safely reduce the maximum recommended mileage to replace oil by 20-30 percent. If you use a car for short distances on neogreen motor, without hesitation, divide the manufacturer’s recommendations on two.


Carbon deposits in modern engines. Look where he comes from and how to prevent sediments

But oil is not so bad. In today’s challenging economic climate, when incomes of the poor, and the cost of fuel is already close to the cost of 1 liter of milk, many drivers try to save money on maintenance of their cars, visiting not only unauthorized, informal technical services, but not very professional artists working in the so-called garage car repair. Yes, this allows the car owners save some money on maintenance and save time. But there is one problem. In such cheap garage car repair, many mechanics, there is no possibility to connect the vehicle to the computer to update the software of the car and to diagnose possible problems.


Did you know that the most common reason for the formation of excessive carbon deposits in the engine is pornoplane software of the engine control unit? Because of this, the car engine may not work properly, resulting in improper combustion. As manufacturers often update the software in their vehicles.


One of the direct causes accumulation of carbon deposits is incorrect synchronization of the engine, which is responsible for the timing belt/timing chain. Unfortunately, diesel engines belt chain and even have a tendency to stretch. This is the problem with many modern engines (a good example is popular in the world of engines TSI/TFSI). If the stretch of the chain or belt is weakened, out of sync with system timing, which in turn leads to incorrect combustion of the fuel mixture.


Hence we conclude that everything that has an indirect or direct influence on the course of the combustion process, is the cause of the accumulation of carbon deposits in the engine. This also applies to defective fuel or ignition system (coil, spark plugs, etc.).


How to prevent buildup in the engine carbon deposits?

Carbon deposits in modern engines. Look where he comes from and how to prevent sediments

This enables us to draw a simple conclusion: you need to take care of your car’s engine. How? It’s very simple. You need to regularly visit the technical center. And not just when it’s time to change the oil in the engine. It is advisable to call the service more often, conducting computer diagnostics. You should consider your car’s engine as a holistic mechanism, not separating it in the field, serving each in turn. Thus, the validation engine should not be limited to changing the oil and filter, and should include a complete diagnosis of the motor, including the software update.


In addition, the more you connect the machine to the computer, the more likely that time will find problems. After all, the mechanic is not always time to understand that, for example, the ignition coil started to work correctly. But plugging in diagnostic equipment, he can learn about it before the machine will start to show symptoms.

Also, for example, by connecting machine to computer, you can even find out if the thermostat opens too early or late. And as you know, the faulty thermostat can cause engine overheating, etc.


Carbon deposits in modern engines. Look where he comes from and how to prevent sediments

– Excessive accumulation of carbon deposits can cause problems with uneven operation of the engine, and such symptoms are misfiring, improper composition of the exhaust gas, malfunction of the lambda probe (sensor (s) oxygen in the exhaust system). It can also lead to problems with ignition system and even increase fuel consumption. Perhaps the biggest problem of deposits are deposits that appear on the elements of the injection system, – said Vladimir Drozdovsky.


If the driver or the mechanic notices any of the symptoms listed above or malfunctions, it needs to suspect excessive accumulation of carbon deposits in the engine.


How to remove carbon deposits in the engine?

One of the easiest ways of removing deposits of carbon is the so-called flushing the engine with a special compound. It uses a special detergent, pour in the engine when you change oil. You can wash the engine yourself. Can also request this service in the service when you get a standard oil change. However, in this case you will pay for it additionally.


Carbon deposits in modern engines. Look where he comes from and how to prevent sediments

– One of the few invasive methods for removing accumulated carbon deposits without dismantling the cylinder head of the engine is the so-called hydrogenation of the engine. However, don’t expect from this process impressive results. Hydrogenation is the introduction into the engine of a gas mixture which increases the temperature of the exhaust gases. Thus, the sediments are transformed into gases and are released together with exhaust gases, – explains Vladimir Drozdovsky.


It should be remembered that in this way it is impossible to remove carbon deposits from around the engine, but only those areas through which flow the gases of the combustion chamber, the exhaust system.


The only really effective way to clean engine is it disassembling and cleaning all parts manually or mechanically, depending on the component. But such costly purification, as a rule, suitable only for engines that already have a lot of problems and can’t be cleaned differently. In any case, such work will be very expensive, especially considering the amount of work.


No rinsing, no hydrogenation …

Carbon deposits in modern engines. Look where he comes from and how to prevent sediments

– Today there are car owners that are interested in quality engine flushing. But recently this service was not in demand. Although, admittedly, in the good old days when each oil change a washed the engines of their old cars. But when a modern vehicle, the flushing massively forgot. Gradually, however, the owners are learning more about what integrated washing or cleaning the engine of carbon are essential. Largely this is facilitated by a senior working in dealerships, telling drivers about the consequences of carbon deposits in the engine, – said Vladimir Drozdovsky.


However, the best precaution is, of course, regular care of the engine. Instead of having to use expensive flushing products to remove the residue, you can, in a sense, to wash out the engine of his car, just changing the oil two or three times more often with shorter intervals, such as every 5000-7000 km. it is Also worth remembering the more frequent you change the engine oil in engines running on short distances. Not to worry, what to do with fouling, it is better to prevent the accumulation of carbon deposits. It does not only change the oil more often, but drive the vehicle more rapidly after engine warm-up using higher revs.