Oil Injection Ports.....Which Way Is Up?????

[Steve S.]

Can someone let me know which one of these pictures would be the correct installation?  Need to know what side goes up.......the flat side, or the "cupped/dished" side?  Thanks.

Steve S.

[reed]

Steve,
I don't think it matters but on all the engines i have worked on, when removing the oil lines the flat side down  to the engine casing.
That would be picture number 2.
Thanks.
Steve Reed.

[Mike Anderson]

Hi Steve,
Nice to see you posting. I am pretty sure your answer is correct. I have always seen them the way you described. I believe it makes a better seal on the bottom, helps stop leaks between the washer and casing. More surface area on that side if you know what I mean. Looking forward to seeing you soon.
Later Mike

[reed]

Mike,
See you on Saturday.
Thanks.
Steve. 

[Mike Anderson]

Hi Steve,
Really looking forward to seeing you Josie and the boys. It has been too long. Give me a call.
Later Mike

[Steve S.]

Hi Steve R.
Thanks for answering this question for me.  Much appreciated!  Talk to you soon.

Steve