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RWD - Your Opinion on Oil Filter and Transmission Magnets?

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Your Opinion on Oil Filter and Transmission Magnets? 200 1988

1988 244DL normally aspirated with stock B230F engine and about 300k miles. Prior owners poorly maintained due to low fluid levels and stripped oil drain plug.

I've read mixed reviews about putting magnets on oil filters. One side said that it traps metal before it reaches the filter, which would have trapped the metal anyways and could clog the filter. Also, trapping THAT much visible metal is closing the barn door after the horse ran out. They add that debris on the oil filters actually helps trap really small particles, so magnets are unnecessary. Plus, they won't trap non-ferrous metals, eg aluminum.

Others swear by it and show a bunch of metal on the inside surface and say it captures 1 micron size metal. Here's one of many YouTube videos:

https://www.youtube.com/watch?v=WcMBbop_11k

"The use of an oil filter snap-on external magnet such as Filtermag, is an excellent additional improvement to any engine’s oil filtration system. I use them myself. The whole point of an oil filter snap-on external magnet, is that it can pull out finer metal particles than the oil filter’s own element can, with NO increase in flow restriction. "

source: https://540ratblog.wordpress.com/2013/06/20/motor-oil-wear-test-ranking/

Filtermag offers magnets that go on the outside of automatic transmissions, inside manual transmissions.


However, my oil filter sits right next to the alternator. Would magnets affect the alternator?

What is your opinion and experience?





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    Your Opinion on Oil Filter and Transmission Magnets? 200 1988

    The filtermags are fantastic, and the filings they trap don't hit the filter element, I use them on my 244/245/cummins, can't hurt.





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    Your Opinion on Oil Filter and Transmission Magnets? 200 1988

    Volvo puts magnets in both Auto and Stick transmissions. I have always used a magnetic oil pan plug and a hard drive magnet on the oil filter.
    Dan





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      Your Opinion on Oil Filter and Transmission Magnets? 200 1988

      Have you noticed metals/debris on the inside of the oil filters that you attribute to adding the magnets?

      Do you use Neodynium (sp?) on the oil filter, or special magnets?





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        Your Opinion on Oil Filter and Transmission Magnets? 200 1988

        Yes neodymium magnets, I never took a filter apart but I recently saw a youtube video (see above) where some did and it clearly took some metallic sludge to the filter case.

        It can't hurt!

        Dan





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    Your Opinion on Oil Filter and Transmission Magnets? 200 1988

    Fix the threads on the drain plug, and as mentioned in your other thread -- change oil and filter regularly. If you're concerned about the filter doing its job over the interval you choose, halfway through the interval, change the filter and top up. To take it one step further, send an oil sample off to Blackstone Labs. For a very modest charge, they'll analyze the oil and tell you a lot about what's going on in your 300k mile engine.
    --
    82 242-6.2L; '17 Mazda3; '16 Crosstrek





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      Your Opinion on Oil Filter and Transmission Magnets? 200 1988

      Thanks. The new oil drain plug assembly can't be removed. I'd have to replace the pan, which involves dropping a subframe.





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        Your Opinion on Oil Filter and Transmission Magnets? 200 1988

        How are you changing oil? Suctioning out through dip stick?

        Gotta think you could remove the plug that's there (drill it if you have to), retap the threads slightly larger, and then use the next largest size bolt/sealing washer for your new drain plug. That can be done with the pan on the block.
        --
        82 242-6.2L; '17 Mazda3; '16 Crosstrek





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    Your Opinion on Oil Filter and Transmission Magnets? 200 1988

    I'd steer clear of the latest IPD magnetic oil drain plug. Somebody though it would be a good idea to put a big honking rare earth magnet in them. Makes for a fun time on reinstall as you have to fight the damn thing to get it properly threaded. Also, I think they may be off on the thread size, not as fine as OEM.





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      Your Opinion on Oil Filter and Transmission Magnets? 200 1988

      FWIW, I have 2, one for each of my 240s --- IPD Mag Drain Plug... bought in the 1980s. Never had a problem, the head-nut is larger than the stock NonMag plug, and that was a selling point then for IPD in their catalogue, that came in the mail, plus a monthly newsletter. That was BTI --- Before The Internet

      The Magnetic Drain plug,does give you an idea of what's going on inside the engine . When you change Your Own Oil, you'll have to wipe off the magnet and you can eyeball the gunk---(use a paper towel). This way you'll be able to see if anything has changed - oil change to oil change over a long period of time.

      Then as the models of Volvo expanded and DYIers got fewer - the 850 FWD years. IPD started marketing all sorts of Magnetic devices, all with nice little paragraphs and pics and graphs showing the benefits.

      I saw it as less part sales and more stuff-for-your-Volvo sales. Gottta keep the lights on.

      So that said, having a Magnetic Oil Drain plug is a good idea.

      Manual trans come stock with magnets in the Drain and the Fill plug...so does the Differential.






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    Your Opinion on Oil Filter and Transmission Magnets? 200 1988

    The magnet wouldn't bother the alternator magnetically, although it might bother it mechanically, since the alternator has some freedom of movement in its rubber mounting.
    --
    Art Benstein near Baltimore

    Children in the back seats of cars cause accidents, but accidents in the back seats of cars cause children.





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