Oil Drain Plug Washer Size

[pekingduck]

In case you need one in an emergency, you can use one off a spark plug, such as a common NGK "B" series plug. Better than using a flattened-out washer that's curling up over the lip.

[Tev62]

In case you need one in an emergency, you can use one off a spark plug, such as a common NGK "B" series plug. Better than using a flattened-out washer that's curling up over the lip.

good idea.

[Cormanus]

I recall a discussion on this forum a number of years ago suggesting that buying the washers via Honda car dealerships was a lot cheaper than buying the identical part from the Powersports dealers. Ferret, I think that was based on your advice.

[GoldOxide_imp]

I never had to replace a drain plug washer on any motorcycle oil sump ever in 40 years of oil changes. The plug never seized, nor did the plug ever leak. In fact, probably the worse next closest "related" experience I ever had was getting a canister oil filter off. A screwdriver through it made quick work of that issue.

[jtopiso_imp]

In case you need one in an emergency, you can use one off a spark plug, such as a common NGK "B" series plug. Better than using a flattened-out washer that's curling up over the lip.

good idea.

good idea.
Another optiion is to re-anneal a used copper washer.

Just let it hang from a wire, heat it with a torch unti it's red, then let it cool at ambient temperature. It will be soft again, and will crush & seal on the next tightening.