Is the magnet on the filter effective? Let's take it apart and check

Many motorists have heard that if you place powerful magnets on the oil filter housing, the filtration of oil from steel shavings will improve. Metal particles that are not stopped by the filter element will then be retained by the magnet. This statement is logical, but does it work or is it in practice? For example, let’s disassemble and inspect a filter hung with powerful magnets from a computer hard drive, which has worked on a car for 12 thousand km.
Is the magnet on the filter effective? Let's check

Required tools:


  • flat screwdriver;
  • hammer;
  • metal scissors or wire cutters.

Is the magnet on the filter effective? Let's check

Disassembling and inspecting the filter


To check the filter hung with magnets, its housing must be opened. It is strictly forbidden to saw it, because then sawdust will get inside, which will be attracted by the magnet, violating the purity and objectivity of the experiment. To open it, you need to place a screwdriver on the top of the filter housing and punch a hole with a hammer. Having expanded it, you should use metal scissors or wire cutters and open the body in a circle like a tin can.At the same time, it is important not to remove the magnets so that all the attracted chips remain in place and do not flow out with residual oil, which will complicate inspection.
Is the magnet on the filter effective? Let's check

After cutting off the top of the filter, the check valve, spring and filter element are removed. Under bright lighting, you can see particles of metal shavings on the inner walls of the case, opposite the magnets. They are very small and resemble sawdust more than drilling shavings. You can notice them due to their number, not their size.
Is the magnet on the filter effective? Let's check

Is the magnet on the filter effective? Let's check

In the filter from the example, pockets of steel shavings attracted to the walls are clearly visible. They are available both on the sides and on the bottom. That is, we can conclude that not only the power of the magnets used is important, but also their quantity. In the example, 3 magnets are installed on the sides and one on the bottom.
Is the magnet on the filter effective? Let's check

Is the magnet on the filter effective? Let's check

Is the magnet on the filter effective? Let's check

As you can see, the magnets on the oil filter really work. Over 12 thousand km, a visible layer of chips formed, which was removed from the lubricant. This significantly reduced the abrasiveness of the oil, which naturally slowed down engine wear. Unfortunately, magnets select only steel particles, while aluminum shavings are stopped only by a filter, so a certain part of it is always present in the oil. Although magnets provide additional purity of the oil, this does not mean that when using them, the lubricant can be changed less frequently.

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Comments (7)
  1. Charlie
    #1 Charlie Guests 3 January 2020 22:15
    0
    Good advice! I myself have been using the magnet for the 5th oil change after I came across a video on the Internet, it really holds up small chips!
  2. Sergei Rendov
    #2 Sergei Rendov Guests 4 January 2020 21:55
    2
    Have you tried it with a regular can opener, or is it too difficult???
  3. Stepan
    #3 Stepan Guests January 5, 2020 12:22
    3
    A long time ago, I had a Ural motorcycle. I once put a ferrite magnet from a speaker in the engine pan, right where the oil was sloshing around. The tray was made of steel, the magnet held tightly, there was no additional fastening. Now I don’t remember how long he was there, a season or two. Upon opening it again, I discovered a “dirty hedgehog” - shavings and sawdust formed needles along the magnetic field lines, and between them there was a lot of soot and dirt stuck, all that either did not reach the oil filter or somehow passed through it. I believe that there are benefits from magnets.
  4. Sergey
    #4 Sergey Guests 6 January 2020 16:33
    6
    Previously, on tractors, the drain plugs in the pans had a magnet; when changing the oil, sawdust was always found.
  5. Guest Alexander
    #5 Guest Alexander Guests 10 January 2020 10:46
    1
    Nowadays magnets are not installed on traffic jams; it is not profitable for cars to run for a long time
    1. guest
      #6 guest Guests 27 January 2020 09:43
      0
      They probably don’t do it on a VAZ, on my Citroen there’s a plug with a magnet!
  6. guest
    #7 guest Guests 27 January 2020 09:39
    2
    I don’t see anything bad in the magnet, but when disassembling the filter this way, shavings of the filter itself are magnetized to the magnet, there’s no point in writing further!