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Thread: Reusing Crush Washer

  1. #1
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    Reusing Crush Washer

    The oil plug crush washer looked to have plenty of thickness to reuse it. So I reconditioned it, took a couple minutes with tools I had handy. Sanded it on a flat surface with 1200 grit sandpaper to get all ridges out and to flatten it, and then annealed it by hitting it with the torch for a few seconds to make it soft again. I will use it on my next oil change. Yes I know they are cheap but I like to recycle if possible.

    After sanding


    Annealing it


    Finished
    Last edited by MyFirstMazda; 07-15-2019 at 04:19 PM.

  2. #2
    Structural Member shadonoz's Avatar
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    Now that's dedication!
    Curious why you felt it should be annealed as well as flattened.
    In the good old days, I'd been known to reuse crush washers with NO preparation, and no ill effects, no leaks. Maybe I was lucky.

  3. #3
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    Quote Originally Posted by shadonoz View Post
    Now that's dedication!
    Curious why you felt it should be annealed as well as flattened.
    In the good old days, I'd been known to reuse crush washers with NO preparation, and no ill effects, no leaks. Maybe I was lucky.
    It had some crush marks, and aluminum gets hard when it is compressed. I suppose it might work without doing anything, but for me, it was either recondition it to reuse it, or use a new washer. I don't recommend a crush washer that has crush marks to be reused.

  4. #4
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    Annealing it was a cool idea. Fixes any stress in the crystalline structure from being crushed.

  5. #5
    Registered Member 7eregrine's Avatar

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    I don't even know what annealing is, but you are now the Recycle King around here.
    /Bows My Liege.

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    Risks $5400 engine to save $5.40 part.

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    Never changed one in my life on any car. Never had a oil leak on any. But they are cheep about .85 cents. Doesn*t hurt to change it.

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    Quote Originally Posted by Zeroman View Post
    Never changed one in my life on any car. Never had a oil leak on any. But they are cheep about .85 cents. Doesn*t hurt to change it.
    This is true here as well...

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    God Mazda parts catalogs suck! Trying to determine what the crush washer P/N is for the 2019 CX5 Sig 2.5L Turbo. Of course 2019 CX5 Sig isn't shown, so I try 2018 CX9 Sig and I get down to the part in the diagram Drain Plug Gasket - Mazda (9956-41-400) and it says it fits my vehicle. But down in the description it says "Without turbocharger". WTF???

    So - what Drain Plug Gasket fits a CX5 2.5L Gas Turbo???? Is 9956-41-400 more-or-less universal? The Vehicle Fitment for 9956-41-400 shows it fits 2019 Mazda CX-9 Grand Touring, Signature, Sport, Touring 2.5L L4 - Gas Aren't they turbos?
    Last edited by St1ngy; 07-16-2019 at 10:05 AM.

  10. #10
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    The Drain Plug Gasket - Mazda (9956-41-400) better fit. I bought two packs of 5 of them off of Amazon for about $7 per pack and am getting ready to do the first oil change on my 2019 GT-Reserve w/2.5L turbo tomorrow. I will report if there are any issues.
    Last edited by DwightFrye; 07-16-2019 at 10:35 AM.

  11. #11
    Registered Member tibimakai's Avatar

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    I just reuse it myself, no leaks so far.

  12. #12
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    Quote Originally Posted by tibimakai View Post
    I just reuse it myself, no leaks so far.
    Yeah, I'm a serial re-user myself (in cars much more expensive) and never had a problem. IMO, the "crush" these washers provide is mainly to prevent stripping the oil-pan's threads. Not to stop leaking. So as long as you take care and don't overdo that final 1/4 turn, you'll be fine. But it's nice to have some spares. Buying one at a time gets cost prohibitive. So I'm probably looking for a lifetime supply.

  13. #13
    Work in Progress sm1ke's Avatar
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    Quote Originally Posted by DwightFrye View Post
    The Drain Plug Gasket - Mazda (9956-41-400) better fit. I bought two packs of 5 of them off of Amazon for about $7 per pack and am getting ready to do the first oil change on my 2019 GT-Reserve w/2.5L turbo tomorrow. I will report if there are any issues.
    That's the correct part number for the washers.

    To anyone freaking out about whether or not the washers are the right ones to use or not, there's a simple solution. Pick up the phone and call the Mazda dealership's parts desk. They can find the correct part for you and provide part numbers if necessary.

  14. #14
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    Quote Originally Posted by sm1ke View Post
    That's the correct part number for the washers.

    To anyone freaking out about whether or not the washers are the right ones to use or not, there's a simple solution. Pick up the phone and call the Mazda dealership's parts desk. They can find the correct part for you and provide part numbers if necessary.
    Oh, the same parts department that told me to use 0W20 oil? (Note: I already that's wrong for a turbo).
    Last edited by St1ngy; 07-16-2019 at 01:43 PM.

  15. #15
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    Quote Originally Posted by St1ngy View Post
    IMO, the "crush" these washers provide is mainly to prevent stripping the oil-pan's threads. Not to stop leaking.
    Pretty much.

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