om617 knocking or injector issue

[@jetstream454]

That sounds so much like either rod knock or a top end issue

[@johnwight6041]

I agree new or rebuild the injectors and see if that fixes the issue. Also new fuel filter, new diesel, and maybe even run some diesel purge to clean the pump before putting in the new/rebuilt injectors

[@bens80smercedes]

Most likely injector. I hope for your sake it is injector. Did you run low on oil at some point? I have to regularly check mine once every two weeks.

[@yeoldethrustbearing]

Put new injectors and crush washers in

[@bens80smercedes]

Double thumbs up on the new injector seals

[@richardvanrouwendaal2742]

chain tensioner