i havent had very good luck with the can am crush washers over the years. every time i have tried to use one again they leak. also make sure you get a small torque wrench and only torque it to spec, if it is over tightened and bends, it will leak...
This looks like the number after a quick search. probably easier to visit a dealer, as you may have to buy them in a 5 or 10 pack from some places online.
Can Am Engine/Trans OEM Plug Screw Crush Washer 420552280
steve
