Re: Drain hole or ding?

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April 25, 2015 at 4:13 pm #14735
DAN ANDERSON
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    Im not sure why they are there, but every V-4 of the era has one that I worked on. I’m with Frank on this one. It is a machined mark for some reason. The oring you see in the parts break down seals the complete area and that little notch is outside of the oring.

    Dan in TN