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Oil drain plug gasket

Discussion in 'Technical Q&A' started by Vito, Apr 17, 2005.

  1. Vito

    Vito Formula Junior
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    Apr 29, 2004
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    Dutchess County, NY
    Does any one know of a ready source & price for the copper crush gasket/washer that is used on the oil pan drain plug for a 1982 308/Mondial motor? I'd like to have several on hand when it's time for oil changes. Also, is this the same gasket/washer that is used for other drain plugs such as the gear box drain? Thanks for your help with this search.
     
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  3. dm_n_stuff

    dm_n_stuff Global Moderator
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  4. Mike C

    Mike C F1 Veteran
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    Mike Charness
    RicambiAmerica has them for 58 cents each. Click Here.
     
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  6. dm_n_stuff

    dm_n_stuff Global Moderator
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    #5 dm_n_stuff, Apr 17, 2005
    Last edited by a moderator: Sep 7, 2017
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  8. yelcab

    yelcab F1 World Champ
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    Nov 29, 2001
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    Mitchell Le
    Global metrics, Belmont, CA.
     
  9. Verell

    Verell F1 Veteran
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    May 5, 2001
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    BTW, all 3 sumps (oil,trans, & xfer case) all take the same washer: 21mm ID.

    The Stat-O-Seal is a fancy brand name for a fairly common 'sealing washer' or 'O-ring washer'. While metric sizes are scarce, given the large flats on the sump covers & heads, I think a 7/8" sealing washer would work fine.

    Google turned up a lot of hits...
     
  10. pma1010

    pma1010 F1 Rookie

    Jul 21, 2002
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    My NAPA stocked the Cu washers. Verell, I thought 22mm rather than 21?
     
  11. snj5

    snj5 F1 World Champ

    Feb 22, 2003
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    In antique aircraft, I remember many folks re-annealing copper crush washers by heating them up very high, then flash cooling them in water.
    Would this work for these?
     
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  13. Steve Magnusson

    Steve Magnusson F1 World Champ
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    Jan 11, 2001
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    Yes, but the final softness is not significantly dependent on the quench rate for Cu materials -- so water or air cool is OK.

    The key word in your post Russ is "antique". I.e., if I don't have a new one easily available, I'd reanneal myself -- but by the time you hassle with that, and cleaning-up the oxide film, buying a fresh handful from Global Metrics or the odd one or two from any F parts supplier (even for $1 each) seems smarter IMO/E.

    22 mm ID x 27 mm OD x 1.5 mm thick Cu is the "308" engine and gearbox oil size just for other's reference (since it hasn't come up lately, and using "search" seems to be so difficult ;)). I know I wouldn't mind finding an extra 5 or 10 in the toolkit so getting 20~50 at a time from Global Metrics was my ex-MO. The TR is even worse -- more sizes, some difficult sizes, and more places -- so I still shop Global Metrics quite often even from CO.
     
  14. matteo

    matteo F1 World Champ

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    I could see doing this in a pinch but at 1.00 or less, why bother?
     
  15. Verell

    Verell F1 Veteran
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    May 5, 2001
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    I could be off a mm, don't have a spec, so used calipers to measure the thread ODs of my plugs & a couple of old washers that I keep around for reference. Definitely measured 21mm.

    Either 21mm or 22mm should work fine as the shoulders are pretty large on both the plug & hole.

    BTW, in a pinch I've just used an o-ring instead of a crush washer & avoided crushing/pinching it by tightening the plug finger tight using a 1/2" drive allen socket. Back then I didn't know the annealing trick. Guess the risk is that the plug might vibrate loose s it isn't torqued down.
     

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