Thanks for the input!

We ended up pulling the head and finding a score on cyl 4 as well as several valves not seating right, so have decided to go through with a whole rebuild. I called several shops local to me and the quotes they gave seemed a bit high (similar to metric motors) and most were pretty backed up. So the engine leaves tomorrow for Metric Motors. Turn around time right now is about a month, so I will hopefully be able to finally enjoy this truck by my 1 year mark of ownership! Haha

Any recommendations for repairs/maintenance to perform while the engine is out?

We are going to make sure the cooling system is in tip top shape, flushing the radiator really good with some cleaner. It looks to be in pretty good shape from what I can tell.

The triple K turbo is getting sent off to a shop recommended by Metric in CA for rebuild as well. (very reasonable price too)

Injectors were pop-tested and came back as excellent condition.

The only other thing I'm thinking thats left to be serviced is the fuel system. New filters will be ordered, probably should flush the lines. I also should probably have the fuel tank drained and cleaned, any advice on this?

Thank you all in advance!

Kurtis