[Automobile World Maintenance] Volkswagen EA888 engine is widely used. The first domestic EA888 series engines are equipped on FAW-Volkswagen Magotan and Shanghai Volkswagen Haorui. As one of Volkswagen’s main engines, the EA888 series engine is now available on Volkswagen’s various models, including FAW-Volkswagen CC, Sagitar, Shanghai Volkswagen Tiguan, Passat and so on. The author is a classic Magotan B6, using the first generation of EA888 engine, because of its excellent fuel consumption and powerful power performance is favored by many consumers, but the problem comes, when this engine accompanied me through the first In the case of 100,000 kilometers, the problems exposed were still quite a lot. Recently, due to the low temperature idling and the 100,000 km, the carbon removal has never been carried out. It is decided to open the engine to it and dig the nose. Of course, this cleaning did not completely disassemble the engine and clean it together with the cylinder head. It only opened the intake manifold to remove the carbon deposits inside the valve. The whole project took more than three hours, and the result after cleaning was more satisfactory. Then, let’s take a look at the cleaning process. The throttle that was first removed before the intake was opened was the throttle valve. Since the gasoline was sprayed directly from the injector into the cylinder, the addition of gasoline additive did not clean the throttle. The scene after removing the intake manifold surprised me. The carbon deposit can be said to be quite a lot. The production of carbon is theoretically a mixture of hydrocarbons. After complete combustion, all CO2 and water will be formed. Carbon is mainly a non-combustible substance in gasoline that is dehydrated and carbonized in the engine and adheres to the surface of the engine and exhaust system. The content of these impurities has a lot to do with the place of production and the production process. For example, the UK with the most classic cars in the world, their gasoline is mainly Brent crude oil, the sulfur content is extremely low, and the content of other substances is also low, so the simple process is used. It can produce high-quality gasoline. There is no sulfide and no impurities after burning. Here, the sulfide is easily oxidized to become a sulfurous acid product to corrode the engine and exhaust system. The impurities are carbon deposits. From the production process, the current national standard to the national five standard is to stipulate the content of impurities, especially sulfides. The stricter the standard, the less pollutants are discharged into the air, and the less impurities are produced. The more complicated the production process, the more expensive the price. The oil is a lubricating oil. Its function is two. One is of course lubrication, and the other is adsorption of impurities. In other words, it absorbs carbon deposits in principle, rather than producing carbon deposits. But more or less some substances will change their properties at high temperatures to form carbon deposits. Speaking of this, I have to mention the matter of the Volkswagen EA888 burning oil. On the one hand, due to insufficient plastic strength of the end cap between the camshaft end cover and the cylinder block, the sealing is not strict, causing oil leakage and other problems. On the other hand, the oil separator often fails, which leads to the failure of oil-oil separation. Because the design of the EA888 engine oil-gas separator is defective, the oil and gas separation is not clean, resulting in more carbon deposits in the engine. The oil component in the secondary combustion is the formation of valve carbon. Causes. The props for cleaning the oil separator are the carbon cleaner of this car servant. The cleaning effect is still very obvious. When it is sprayed onto the carbon deposit, it will bubble like a cola, thus depositing carbon < corrosion! The price that the merchant gave me was 15 pieces. I saw that a certain East found that it was lower than the online price, or was very pleased that it was not “stuck”. Intake manifold flaps By controlling the opening and closing of the intake manifold flaps, the engine’s aeration requirements under different operating conditions can be met. If the engine is in low speed condition, the lower intake passage is closed by the intake manifold flap, which can reduce the cross section of the airflow to increase the airflow velocity. Combined with the special design of the piston crown, it effectively forms a strong intake vortex. Conducive to the formation and atomization of the mixture. Similarly, when the engine enters a high-speed condition using a homogeneous mixture mode, the intake manifold flap opens the lower intake passage, increasing the cross-section of the airflow to obtain more intake air and increasing the engine output. The plane bearing causes the swaying plane bearing to be located at the top of the shock absorber. The left and right steering is dependent on this part. “Lubrication”. The symptom before the replacement is that there will be a squeaking sound at the top of the shock absorber when the U-turn is turned, although it does not affect the driving safety. However, the abnormal noise will always make people feel troublesome. After talking with the Magotan riders, it is found that this is a common problem. Most of the owners who are going to maintain the problem have this problem. As for the price, you can refer to a treasure, it is not very expensive, because the disassembly is more time-consuming, so the working hours are not cheap compared to this accessory. After cleaning, the engine jitter becomes smaller and becomes more regular. The acceleration is smoother. It seems that the nostrils are more fluent. It can be said that it is worth the money. In fact, 100,000 kilometers can be completely dismantled and the engine is completely removed. It can also make the old engine reborn. The problem of carbon deposition is compiled in a small series. It is collected from the cattle network. I hope that everyone can help. 1. Is it possible to reduce the carbon deposit? Carbon deposits are mainly impurities in gasoline, as well as dust particles in the air, which are formed by precipitation in the combustion chamber. Gasoline with a high number of labels is less polluting, and high-grade gasoline is used if possible, which is indeed good for the engine. For the same reason, don’t run a lot of dusty roads frequently, and often clean up the air grid (air filter), which can also reduce the carbon deposit. 2, long idle, parking air conditioning will cause carbon deposits? Don’t let the vehicle idle for a long time, especially if you don’t want to turn on the air conditioner for a long time. “When the water temperature is 85~90°C, the engine will be in the best working condition, otherwise the gasoline will not burn enough and there will be more carbon. From this point of view, the long-term hot car in the morning, the engine temperature rises very slowly, it will also cause carbon deposits. The air conditioner operates at idle speed and also loads the engine. ” But don’t have to do too much, if you only need a few minutes, there is no need to turn off the fire. Because of the moment of restart, not only the fuel consumption is high, but also the engine is worn. 3, running high speed can wash away carbon deposits? Running high speed, you can use the airflow to wash away the airway and wash away some of the carbon. Therefore, if you just go out and have a choice of high speed and national highway, you may wish to choose a high speed. 4. When the car is parked, it will hang the air and slam the throttle. Can it wash the carbon as the high speed? In theory, idling the throttle will wash away some carbon, but this method is not very recommended. The first is wasting gasoline; secondly, idling is not good for the engine. In particular, the speed reaches more than 4000 rpm. If it is not running on the road, no wind blows in to cool the engine, which will affect the engine. 5, I heard that no-clean cleaning, and can not completely remove carbon deposits; can be disassembled to clean, but also afraid of damage to the engine, what should I do? Of course, the disassemble cleaning is more clean, but there are advantages and disadvantages. After the engine is turned on, it is inevitable that there will be sequelae such as air leakage. Under normal circumstances, the disposable cleaning can also be cleaned and save time. However, some cars accidentally use inferior oil, they will get stuck in the piston ring; or when they are refueling, they may have some oil stations that are not good enough to block the injectors, and they can only be disassembled. 6. What is the difference between fuel cleaning agent and fuel oil? Can fueling treasure be able to remove carbon? The fuel cleaning agent is mainly used for carbon deposition in the fuel system and is professionally cleaned by equipment. The fuel treasure is added directly to the fuel tank, which allows the gasoline to burn more fully. Some high-end car sensors are more accurate, and the requirements for oil products are relatively high. If the gasoline does not meet the standard, the discharge lamp on the instrument panel will light up, and the addition of fuel can prevent it. However, ordinary family cars are not so demanding, and fuel treasures are more expensive. Owners can decide according to their economic affordability. 7. What is the most effective and convenient way to remove carbon? Carbon deposition is still the main prevention: Do not use fake inferior lubricants to go to the regular repair shop for maintenance. If you use inferior oil, you can’t see the impact in a short time, but in a year or two, it will cause serious carbon deposits and even damage the engine.
May 7, 2019 0 Comments
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