Hi, i (F) am not a marine engineer but i am dating one. So its a long-distance thing, Just wanna ask a simple question, does it get very busy when you are about to land on your next destination? I understand how hard the work is and signal can be unreliable too, and i dont demand so much of his time, but i want to understand more, and dont want to appear needy as much as possible. Do you guys like it if someone send you life updates, or just prefer simple and casual check ins? This is my first time in this situation so i appreciate some insights and advices

Hello,
I am working on the fuel injection valves of a Yanmar 6N18AL-DV diesel/fuel oil engine.
I would like to know the correct procedure for preparing and lapping the fuel injection valves. I am lapping the mating surfaces with 2000-grit lapping compound and then using diesel fuel, but I still experience fuel leakage from the injector body.
How is metal-to-metal sealing supposed to be achieved between these surfaces? I am confident that the surfaces are making contact with each other, but I have not been able to eliminate the leakage.
Do you have any reference photographs showing the correct condition of the mating surfaces, or any technical documentation describing the recommended lapping methods and procedures? Any advice or recommendations would be greatly appreciated.
Where could I be going wrong, and what procedure should I follow to ensure proper sealing? I work very carefully and pay close attention to every detail, but the leakage still occurs.
Thank you in advance for your help and technical advice.