2013 isx 15 loud howling/whine?

[JeepnSammys]

Problem found !! took it to the local stealership (Cummins Dealer) showed them the noise it was making 2 days later they say it need a turbo??? Weird cause the noise is coming from driver side of the motor near the fire wall $1022.00 worth of diagnostic fees later i take truck home pissed off of course so then local mechanic and myself are talkn about it and decide that stealership is full of crap so we start trying to sort out where the sound is coming from i thought what the hell i will do the ole screwdriver to the ear and see if i can pin point it. it sounds like it is coming from around the filter on the side of the engine so i start there i end up going over everything on drivers side of motor and i cant pin it down but it sounds like its at the filter still so i go over the housing for the filter a second time but start lisening to every inch of the housing and assembly its connected to and bing i can hear it plain as day its in the housing that is connected to the fuel filter not sure what its but its there for sure so we decide to change filter and see if that does it. after filter change truck wont prime cause the lift pump is not working! so i go after a new pump meanwhile my mechanic friend is puzzled by this and calls his buddy (a mechanic at peterbilt) tells him whats going on and he says he ran across a truck in the past that was making same noise and that the fuel filter assembly is mounted to the engine using rubbber isolators turns out they were tight but not doing there job and was causing the loud humming howling noise. Meanwhile i return with lift pump and we get truck primed up and running! NO MORE NOISE!! i cant believe it but were not sure what it was . could have been the filter, the lift pump or the pulling around on the fuel filter assembly causing it to set diffferntly on the isolators we dont know but the noise is gone. Meanwhile i called cummins raised hell about what happend and they credited me $300 ( better then nothing) Meanwhile i wonder is my turbo going bad they said that was my issue? no codes runs fine pulls good and is clean and dry i do funny noises in the breathers like turbo chuffing sounds sometimes but all runs good other then that also i should say my turbo looks new all bolts and housing are very new shiny looking and my mechanic friend says he thinks someone just replaced it prior to me buying it Stealership said the gear that turns is tight and when it gets warmed up is even tighter and hard to turn?