Recently, there was a car owner doing maintenance. When he arrived at the store, he complained: After the last maintenance, although he had already used the full synthetic engine oil sent by his friend, the engine sounds louder, is it the fake oil given by my friend......
The owner told the owner that facts speak louder than words, and the maintenance will be known! So, the repairman removed the machine filter, and the black and black oil dripped down. After the oil was released, this...... Why is it a little strange? There are a lot of impurities in the engine oil! Then open the shell of the replaced machine filter and have a look...... Can't cry......
The car owner on one side was also shocked. When he asked him the price of the maintenance time at that time, the car owner was so cute that he answered: 10 yuan......
(Reading lip language by yourself is a reflection of the owner's heart)
The owner told the owner that your friend didn't give you "fake oil", but the 10-yuan machine filter destroyed your full synthetic oil. In fact, this kind of situation often happens, especially in the small repair shops of the third, fourth and fifth tier cities. How can we not buy fake machine filters? The following small editor will teach you a few tricks!
First trick: the appearance of a good machine filter must look good
The machine filters produced by well-known brands are not only good in materials and workmanship, but also not careless in the handling of appearance details-only well-known brands are willing to invest the best in appearance details, counterfeit goods or new products do not have this ability at all, and I am too lazy to do it well.
The method of "taking machine filter with appearance" is actually very useful, because a good machine filter must have a good appearance. The source of cheap machine filters itself is very suspicious. Their predecessor may be used waste machine filters, which can be reassembled and sold after renovation. Of course, the process can be saved.
Second trick: Check whether the machine filter rubber ring is tough and soft
Rubber Ring of the oil inlet and outlet of the machine filter is also one of the references for judging whether the machine filter is good or bad. You can take off the rubber ring and pinch it with your hands to feel the texture of the rubber ring.
Good Machine filter, its rubber ring material will be very thick, and it will feel soft when pinched by hand to ensure the sealing around the inlet and outlet.
Third trick: see if it has a check valve structure inside
Whether there is a check valve is also an important basis for judging the quality level of a machine filter. You can use the small tools around you to identify whether the machine filter has a check valve structure.
The machine filter check valve is actually a rubber leather cup, very simple component, but its function is quite important-it can block the oil backflow to ensure that when the engine starts cold, oil pressure can be formed in the lubrication system as early as possible to ensure oil supply and shorten the dry grinding time of the engine as much as possible. Simply put, the check valve is a device that allows the lubrication system to store as much oil as possible after the vehicle is shut down.
The fourth trick: reach into the inner wall of the machine filter
The filter element of a good machine filter will be firmly fixed inside the machine filter and will not shift when bearing the oil pressure and vehicle turbulence, so as to ensure that the oil will be filtered through the filter paper. Therefore, the quality of a machine filter can also be judged from the fixed degree of the filter element.
Fifth trick: shake the filter hard to hear whether there is noise
The judgment basis of this trick is the same as the method of touching the inner wall-Good Machine filter, the fixing of the filter element is better, and the noise of parts interfering with each other will not appear when shaking.
What is the inside of the machine filter?
As the saying goes: Although spadger is small has everything! A small machine filter has many components. Apart from the shell, bypass valve and seal ring that we can see when we get it, the filter element and check valve of the machine filter determine the effect of oil filtration, it can be said to be the heart of machine filter. In addition, the fixed spring becomes the guarantee that the filter element can work in the correct "posture" for a long time.
How does the machine filter work?
There are two types of impurities generated in the engine: one is the metal chips worn by the engine parts on stream; The other is the high temperature state of the engine oil during the operation of the engine, black sticky tape muddy organic matter produced by chemical changes. These impurities will be mixed in the engine oil, along with the engine oil swimming in the lubrication system.
Why do you say "good oil should be equipped with machine filter"?
The engine oil flows in the engine, and the impurities attached to the surface of the machine will be washed off while lubricating the machine parts. The impurities washed are suspended in the engine oil under the action of oil cleaning factor, and the oil flows randomly. When passing through the machine filter, larger impurities will be filtered out, and the filtered clean oil will re-enter the lubrication system for circulation.
If the filter capacity of the matching machine is not strong or even does not have the filter capacity, the unfiltered oil will re-enter the lubrication system, which will aggravate the wear of the engine. Therefore, car owners should not only be willing to "feed" good oil to their cars, but also be willing to match good oil with good machine filter.
How inferior is the cheap machine filter?
Back to the topic we started, you get what you pay for, and it is applicable to all kinds of products. Machine filter with less than ten yuan, where do you think its quality can be better? In addition to the machine filter made by Wang Laoji, what else is the performance of inferior machine filter?
