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400 barrel 'O' rings

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Matt_Harrington:
Especially as the liner goes into a non circular aperture in the top crankcase.....

Bryanj:
I was told it was to stop oil "wicking" up between liner and block

Trigger:

--- Quote from: Matt_Harrington on August 24, 2023, 09:30:05 AM ---Especially as the liner goes into a non circular aperture in the top crankcase.....

--- End quote ---

They should seal against the base gasket  ;)

Matt_Harrington:
Perhaps I'm just over thinking things. I suppose there is enough of the top face of the crankcase to push up the 'o' ring and the rest of the ring will follow suit. The gasket appear to only have about 2/3rd of the gasket that will touch the 'o' ring.

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