N14 Top End Knock

I have the shop manual, but its assuming a dry engine, and a fresh head lol. Dont have either of those but it does say to lube it up with oil so part 3 of the question solved. Kind of forgot I had a printed copy and a pdf on my phone.

 

I'll give that a try, any ideas on where I could get one of those brushes, dealer couldn't find it in their catalog when I went today and Cummins HQ says they only sell to dealers and certified shops.
Edit: found them online, it looks like theirs three, a spiral brush, and then two normal brushes. I'm assuming the spiral brush is the one to use, according to their site its stainless steel filaments.

 

Thanks for the link, this one says copper bristles and I've got one ordered. I'm going to give a stiff bristle nylon brush a try and see if that will clean it out at all while I wait.
The tech at the dealer is convinced the injector is stuck open and recommended I inspect the piston crown, the driver drove it about 1000 miles in its condition so I'm hoping the piston isn't torched. Any odds on the likelihood its torched?

 

Not a hint of smoke according to the driver, I tailed him empty for a few city miles and there wasn't any smoke then either. Couldn't find my thermometer but feeling the exhaust manifold, number 1 and 2 holes were about the same temp at idle, he said if it was stuck open it would be too hot to touch seconds from start up. Unplugging the injector gets rid of the knock but RPM stays about the same, doesn't drop just gets rid of the knocking noise.
I'm with you on the nylon, but figured it would be worth the try, driver wants to get back on the road ASAP and it's either a nylon brush or some brass wool for cleaning it out because he doesn't want to stick around for the end of the weekend.