Scott, that metal ring's sole purpose it to clamp the end cap on the
tube, against it's sealing ring. If you lived here in the east you'd
have a chance to see a lot of them rusted off! :-)
And no, should not matter which direction it goes, but if pointed
forward it gives more fire exposure when it blows off from rust!

Karl

Scott Daniel - Turbovans wrote:
> I asked once before, and didn't see a reply.
> so .......on waterboxer fuel injectors........that black plastic 'fuel
> rail'
> thing they connect to,
> two questions,
> there is a round shiny metal thing on the forward ends of the black plastic
> 'fuel rails.'
>
> What it that thing ? ( a damper of some kind is all that comes to my mind,
> IF it is anything besides just an end cap )
> and ....
> does it matter which way those things point, forward or aft ?
>
> I doubt it matters, but have one engine with them on backwards ( runs fine
> btw )
>