If fuel,oil and lubricant are compared to blood, then the filter is like a kidney, and its working state is directly related to the performance and life of the engine. From the popularization of the Europe three rail systems, to the present europe five systems, although we know more and more about filters, we all know the damage of inferior filters to injectors, but we do not know that the wrong installation process is also very dangerous.

Maybe someone said, "It's not difficult to change the filter, just take it down and screw it up." It is true that the replacement process is very simple, but many people have made fatal mistakes in this simple process. What are the specific mistakes? That is to fill the filter with oil before installing it.

It is very common to fill the interior with oil before installing the filter. Most people do this no matter they are diesel or oil filters. In fact, the method of filling the oil filter before installation is also understandable, because the cleanliness of the new oil is better, and the oil filter can not manually exhaust, after filling the oil, it can reduce the time when the oil reaches the lubrication part and protect the engine. But if the diesel filter is operated in this way, it will play the opposite role.

In fact, the method of pre-filling filters to avoid exhaust has a very long history, which can be traced back to the time when diesel engines were widely used. At that time, almost all diesel engines used mechanical pump fuel injection system, which did not require high cleanliness of fuel itself. In addition, the small displacement of hand oil pump and poor reliability made it very difficult to replace the filter after exhaust, so people at that time invented this flexible method of pre-filling and no exhaust. I have to admit that this method is really very effective.

Since the engine entered the era of common rail, the fuel system, especially the injector, has become very precise. A little impurity may cause the expensive injector to be scrapped. At this time, many people continue to replace the filter by the previous filling method, resulting in the direct entry of unfiltered diesel into the filter chamber, if the diesel contains particulate impurities. It will directly cause the wear and tear of the injector.

The correct replacement method is to remove the old filter, then install the new filter directly on the base of the filter, then loosen the bleeding bolt on the base or the oil pump, press the hand oil pump exhaust, until the new filter is filled up and no bubbles appear on the exhaust bolt. Because of the large filter area and capacity inside the filter, the exhaust process may be slow. Don't be afraid of trouble, just press the hand oil pump several times more.

Although the maintenance experience handed down by the old drivers is valuable, there are also many vehicles that have long been unsuitable for today's high-tech vehicles. Therefore, we should also keep pace with the times. Those who should be discarded must be discarded. Otherwise, these outdated methods will probably cause unpredictable losses to us.