Do not install the filter directly! Or wait for the fuel injector to be replaced!
If diesel oil and lubricating oil are compared to human blood, the filter is equal to human kidney. Since it is equal to kidney, its importance is self-evident. Its working state directly affects the performance and life of the engine. Although people know more and more about filters and know that inferior filters are easy to damage expensive fuel injectors, they do not know that the wrong installation process is also dangerous.
Some people may say, "It is not difficult to replace the filter, just remove and tighten it." Indeed, the replacement process is very simple, but many people have made irreparable mistakes in this simple process. What is the specific error? That is, fill the filter with oil before installing the filter.
It is very common to fill the filter with oil before installing the filter. Most people, whether they are diesel filters or oil filters, do this. In fact, before installation, it is understandable that the oil filter should be filled with oil. Because the new oil has good cleanliness and the oil filter cannot be manually vented, the time for the oil to reach the lubricating part can be reduced after oil filling, which plays a role in protecting the engine. However, if the diesel filter still operates in this way, it will have the opposite effect.
The method of adding oil to the filter in advance to avoid exhaust has a long history, which can be traced back to the time when diesel engines were just popularized on a large scale. At that time, almost all diesel engines used mechanical pump fuel injection systems, so the requirements for fuel cleanliness were not very high. In addition, the manual pump has small displacement and poor reliability, which makes it very difficult to exhaust after replacing the filter. Therefore, people at that time invented this alternative method of pre filling without exhaust. I have to admit that this method is indeed very effective.
Since the engine entered the era of common rail, the fuel system, especially the fuel injector, has become very complex. A small amount of impurities may cause expensive fuel injectors to be scrapped. However, many people continue to use the previous filling method to replace the filter, resulting in unfiltered diesel directly entering the inner chamber of the filter. If the diesel contains particulate impurities at this time, it will directly lead to wear and damage of the fuel injector.
The correct replacement method is to remove the old filter first, and then directly install the new filter onto the filter base. Then unscrew the ventilation bolt on the base or oil pump, and then press the manual oil pump to exhaust until the new filter is full and there is no bubble in the ventilation bolt. Due to the large filtering area and capacity in the current filter, the exhaust process may be slow. Don't be afraid of trouble, just press the manual oil pump several times.
Although the maintenance experience handed down by old drivers is valuable, there are also many vehicles that are not suitable for today's high-tech vehicles. Therefore, we should also keep pace with the times. The old imperial calendar that should be abandoned must be abandoned, otherwise these outdated local methods may cause us unpredictable losses.
