Engine sizing is a procedure aimed at improving the performance of internal combustion engines. Currently quite common. Usually it is carried out in autumn or spring to prepare the machine for use in the new season. Some motorists carry out this operation on their own, while others prefer to contact a car service. As a rule, engine coking helps to avoid major repairs. In this article, we will tell you about the reasons for the coking of piston rings and the appearance of dirt in the combustion chamber, and also consider methods of coking ICE.
Zone formation of soot and causes
- Poor fuel is the reason for the appearance of dirt in the combustion chamber of the engine. The walls of the chamber and piston bottoms are overgrown with carbon compounds and soot from unburned fuel. As a result, heat dissipation noticeably worsens. In the best case, the valves are covered with soot; in the worst, they burn out.
- The presence of additives in the fuel that contain metal; oxidation or decomposition of metal that enters the combustion chamber.
- Frequent trips on a poorly warmed engine with a light load, standing in traffic jams, riding at low speeds.
A large amount of soot and dirt leads to a decrease in the volume of the combustion chamber, which leads to detonation phenomena. This reduces the power of the internal combustion engine and significantly increases the loss of wear and friction of the crank mechanism of the internal combustion engine and the cylinder-piston group. Also, the flow areas of the valves - exhaust and inlet are reduced.
How is engine coking carried out?
At the moment there are several ways to carry out the deoxidation of ICE. They are conditionally divided into “hard” and “soft”.
Rigid coking of the engine is more common among motorists. Reviews about it in most cases are positive. The essence of this method is quite easy to understand. The car is placed horizontally, the engine is heated to operating temperature. After that, remove the nozzles or unscrew the candles. Next, turning the crankshaft, put the pistons in the middle position. Then, special chemistry is poured into each cylinder and left in the combustion chamber for some time (from twenty minutes to twelve hours) in order to soften the carbon deposits. At the same time, the candle wells are closed, and the ignition is turned off. After mowing, they start the ICE and give it a little work at variable speeds (or just drive about fifty kilometers). Then, without fail, change the oil.
Cons: the effectiveness of hard skokoksovaniya depends on the chemistry used and on the type of ICE. In most cases, it is possible to remove only soot on which the cleaning fluid has come (i.e. rings and piston heads). Valves and chamber walls do not clean well. It is difficult to put the pistons in the middle position - for this you need an assistant. In addition to oil, you have to change the spark plugs.
The second way is a soft flush of the engine. It implies that only piston rings are cleaned of carbon deposits and carbon compounds, since the cleaning composition is poured into the oil 110-200 km before it is replaced. Before changing the oil, the engine must be operated as gently as possible. According to the manufacturer of the chemical composition, such a drug should delicately affect the lower piston oil scraper rings. They are most prone to "bedding." Soft skokokovanie engine is recommended for cars with medium and high mileage, as well as internal combustion engines, with strong wear of parts.
Cons: with it, you can’t clean either the valves or the combustion chamber. Most preparations for mild cleaning are flushing liquids, in which additional components for cleaning from the piston rings of soot have been added. This method can be used as a light prophylaxis, resorting to it with every oil change.