Need tech advise on top end rebuild

[LeRoy]

In rebuilding my '49 EL I noticed the intake valve oilers were missing. I have located these but the parts book shows an intake valve oiler gasket (part #18110-49). Does anyone know where I could get these, or where they go and what they do so I could figure out what might work as a substitute? Thanks for any help. LeRoy

[kg993]

The part you are asking about is a copper washer. It goes on the oiler and under the nut, it's about 1/16" thick. I think most people leave it out, I rarely see them on a teardown anymore.
Kerry