I would suggest, as you already know...to replace the turbo coolant hoses while they are out in the open. I'm going to leave it to the other guys for more.....but why are they replacing your 97K engine?
What happened to it?
Sorry for your pain though....this cannot be high on your list of "fun things to do" brother.
jeff
fwiw; my '17 has 115k ....so yes, I'm vested in your response LOL
At the end of April when I was almost home from a trip from FL (~1200 miles), I had a bad misfire, flashing CEL, reduced power, terrible clicking, etc. Thankfully this happened about a mile from my house, so I basically rolled home. Pulled up codes p0022-p, and p0306-c. It was still under warranty, so brought it in the next morning. Replacing coil 6 solved all the codes and the misfire/limping. However, even though no codes were present, and it ran well again, it still sounded BAD. While driving and the turbos spooled up, they were loud enough to not hear it, but at idle and if I revved it in neutral, it sounded like absolute shit. I thought it was maybe some chain slap situation like I’ve read about on here. I got it into Ford at 97400, I had put maybe another 800 miles on it from when the coil was fixed to being actually able to get the truck into Ford between my schedule and theirs.
They’re saying it’s a crankshaft rod knock. I don’t really know enough about the internals of the engine (mostly I’m a tinkerer and wrench turner), so I’m not really sure how something like this happens/develops, but their recommendation is new engine.
I’m not sure if there is a chicken or egg situation here, but I never noticed the truck sounding bad bad bad like that until after the misfire incident.
What I don’t love is that, while, yes, I’m getting a functioning engine that also has a decent amount fewer miles, I know nothing about its history, maintenance, etc. Guess I should still accept it as a victory when I got dealt a bad hand.