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Question:

any one know what kind of material magnets cant work through?

i know my wording isnt all that clear, but any one know of some thing you can put between a magnet and some metal that would keep the metal from sticking to the magnet?

Answer:

The life of you vehicle may be affected. You may overrun the engine. The workshop mechanic will love you ;)
As long as you do not bypass the Mass Air Flow sensor/ Intake air temperature sensor and you can create a good seal with the new filter that you would be fine.
In general, magnetic fields do not register through ferrous metals; that is, if you put a sheet of steel in the way, the magnet will not attract a second steel object on the other side. It will, of course, attract the sheet you are using as a shield.
The are generally five substances that are naturally strongly magnetic: iron, nickle, cobalt, gadolinium and dysprosium and are called ferromagnetic. If you apply a strong enough electro-magnetic field, anything can have a magnetic field. When you apply a field to a substance, especially a ferromegnetic one, the applied field causes the magnetic moments of the constituant atoms of the substance that the field is being applied to, to align with the applied magnetic field. This induced magnetic field adds to the applied magnetic field strength. So I must totaly disagree, in fact, contradict, aviophage and her responce. Ever take a magnet and pick up a paper clip. Then pick up a string of paperclips, each attached to the clip before it? That is an example of a ferro-magnetic material acquiring an induced magnetic field. To the best of my knowledge, things can be electrically shielded, as with a Farraday cage, but not magneticaly shielded. Please, if anyone knows otherwise, enlighten me. TK
An enclosure made of a stubstance that is highly permeable to magnetic fields, if it is thick enough, will deflect an external magnetic field through the shield and around its contents. This is how mu metal magnetic shields work. Iron or any other ferromagnetic material will also work for that purpose. A magnet completely enclosed in such a shield will produce no magnetic field outside the enclosure. Almost as effective is putting a keeper or a heavy bar of magnetic material on a horseshoe magnet. The magnetic field will then be almost entirely confined to the material comprising the magnet itself and the keeper. A toroid, or doughnut shape, made of magnetic material may have no external magnetic field even though it is in fact strongly magnetized. This will occur if the direction of magnetization is through the interior of the ring material and the material is uniformly magnetized. This effect is routinely used in the design of electrical inductors for power supplies. The inductor works by storing energy temporarily in a magnetic field. The toroidal shape helps keep the inductor from picking up external magnetic fields or producing external fields that could interfere with neighboring components. Another shape, called the pot core, is also fairly frequently used in the design of inductors and transformers in switching power supplies. This is a fairly complicated shape that has a central column and an integral enclosure around this column, with only small slits in the outside for the winding leads. The common E-I and E-E designs of laminated magnetic cores for power transformers is a much less expensive, albeit less effective, design where the two outer legs and the uprights of the E and I act as the shield and provide a return path for the magnetic field, while the windings are around the center leg of the E.

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