The main reasons for engine cylinder pulling and how to effectively prevent cylinder pulling
There are two main opinions on the market regarding engine cylinder pulling. One is that it is that the strain caused by oil , and the other is that it is that the strain caused by carbon deposits is whether it is carbon deposits or oil?
Let’s interpret it from two aspects. In general, it can be divided into two types: one is a serious cylinder, and the other is a mild cylinder.
Severe pull cylinder
occurs in the entire cylinder block with a dense, fan-shaped strain. The area is very wide and the density is very large. This is a serious strain. In this case, you can only overhaul the engine. Re-boot the cylinder and lower the cylinder liner. There will be severe oil consumption. There is no other way. Overhaul is the only way.
Slight pulling cylinder
Another type is that several vertical strips of black or metallic pulling marks appear on the wall of the cylinder, which is a slight strain.
The reason for pulling the cylinder
1. Severe strain
Let’s talk about the first type of severe strain. In fact, there are three main reasons for severe strain:.
Reason 1: We use engine oil improperly, for example, we require 20 engine oil, and we use 30 engine oil, which will cause serious strain on the cylinder wall. For example, the Land Rover engine that is produced now requires 0-20 engine oil, and we use 30 engine oil. As long as the car is added 30 engine oil, the car will drive 300 kilometers and get back at high speed, and it will cause serious cylinder pulling.
Reason 2: The lack of engine oil is serious. For example, if the car does not burn the oil, suddenly there will be a burning oil. However, we don’t know whether this car has an oil warning system. Without knowing it, the dipstick will completely reach the oil. After a while, the oil lamp will alarm at least tens of kilometers or more than one hundred kilometers. At this time, serious strains in the cylinder wall are likely to occur because the lack of engine oil leads to excessive temperatures.
Reason 3: The lack of antifreeze , or the entire antifreeze circulation system is problematic, causing the engine temperature to be too high and causing strain. The above three points are the causes of serious strain on the cylinder wall.
severely wear and strained cylinder walls, which may cause abnormal engine noise or abnormal idle sound. However, because we often use cars and are familiar with this kind of sound, as car owners, we may not be able to hear it.
2. Slight strain
Let me talk about the minor strain. Slight strain is actually easy to understand. It mainly has some relationship with carbon deposits. For example, there is too much carbon deposit on the top of our piston , then at this time, too much carbon deposit will sink to the positions of gas ring or oil ring, so that the gap between the cylinder wall and the piston is covered with carbon deposits, and when the piston is running, a black vertical strip will appear. The following figure
There is another possibility that carbon deposits are not many, but it happens to be concentrated in a certain part, so at this time, some metal-colored groove-shaped vertical strips of the cylinder wall will appear. The above two strains are actually not serious. They are found in many cars. They are mainly caused by long-term failure to clean the oil circuit, especially the use of PNF technology detergents to clean the oil circuit, which is caused by quantitative change to qualitative change. What we should note here is that once this strain is discovered, we must think that this engine may have started burning, or that this engine will burn oil soon. This is a clear signal whether all engines will experience such minor strains when burned. Not so, for example, many cars of Volkswagen Audi do not have this kind of strain, but it has severe burning of engine oil. Therefore, if the cylinder wall is not strained, it will also burn oil. However, straining the cylinder wall must mean that the engine oil has been burned, or serious oil consumption is about to begin. Therefore, you should pay enough attention to seeing slight stretch marks.
How to solve the problem of cylinder pulling
The engine cylinder wall is severely strained. We must replace the cylinder liner for overhaul. If there is a slight strain of several vertical strips, there is no need to overhaul the engine.
Let’s take a look at a case, such as the Korean engines produced earlier, including Kia Hyundai. These engines do not have an oil injection system in each cylinder, that is, the fuel injector of the oil. The function of the oil injector is to inject the engine oil into the piston skirt lining, that is, to spray the lower part of the piston in each cylinder, to keep the oil lubricated, and at the same time, the maximum effect ensures the stability of the engine heat. That is, when it is sprayed to the cylinder wall, the engine oil will take away a lot of heat to prevent the engine temperature from being too high. However, in the early years, these engines did not have this device, which caused a lot of cylinder pulling. To put it bluntly, it is high temperature. At that time, even if the new car used very good engine oil, it would have severe wear and tear in 80,000 to 90,000 kilometers. The problem would be solved by overhaul. This design defect was compensated later. An oil injection nozzle is installed in each cylinder to inject upwards to accelerate lubrication and cool down.
How to prevent cylinder pulling
How to effectively prevent cylinder wall strain? Because severe strain on the cylinder wall will inevitably burn the engine oil, a slight reminder that we are about to start burning the engine oil or that we have already started burning the engine oil. So at this time, we can only solve the core problem of cylinder wall strain and the problems can be avoided. So where is the core question? For example, the lack of high performance and insufficient lubrication as we just mentioned is actually a high temperature phenomenon, insufficient antifreeze or the problem of antifreeze circulation system, which also points to high temperatures, including improper use of engine oil in the year, and it will also be so high. For example, the heat dissipation of 20 engine oil is actually better than that of 30 engine oil, so if you use engine oil with too high viscosity, it will also cause too high temperatures, burn engine oil, and even higher viscosity will lead to problems with the turbine, crankshaft , and problems with crankshaft size and tile. Therefore, after many cars have burned engine oil, it is not a wise approach to make us increase the viscosity of the engine oil.
Because after increasing the viscosity of the engine oil, you can only see that the oil consumption seems to be reduced for a period of time, but other serious losses caused by the engine are irreversible. Even the high viscosity oil will inevitably cause serious strains in the end. You need to overhaul if you want to repair the oil, because the essence of our method of increasing the viscosity of the engine is not to overhaul the engine to alleviate and cover up the problem of burning the engine oil. However, because the viscosity of the engine oil is arbitrarily increased, the overhaul method is actually to be adopted. It is really not worth the cost.
Prevention of high temperature
The word "high temperature" in the entire engine is so important, how to prevent high temperature? The combustion temperature in the
engine is the highest, for example, 1500~2500 degrees, which determines the temperature according to the characteristics of different engines. If we keep the fuel oil circuit clean in a good state, the combustion temperature will be relatively hundreds of degrees lower. As the low hundreds of degrees change, with the change of the vehicle time, it will produce completely different results. For example, some engines often drive 70,000 to 80,000 kilometers in a short distance, but if you often use an effective oil circuit, it is very likely that there will be no serious oil combustion in 150,000 to 10,000 kilometers. Therefore, when we use cars in China, must use PNF suitable for domestic oil products. This type of patented technical detergent is often used to clean the oil circuit, which will greatly delay the occurrence of engine oil burning, and can even avoid cylinder pulling due to high temperatures.
Please indicate the source for reposting: Reprinted from Siyoupu damage-free repair and burning engine oil internal information
