where is this knocking noise coming from? and how to fix this? ( Note: the truck in the video is not mine). My truck has done this at least on one/two different occasions in the past.

 

Sounds like a 7.3 to me. Snow is down, temps are low..........

I'm in northern Michigan. I get a little feedback once in a while depending on fuel blend, but are you running winter treated diesel, any additives??

I sure wouldn't be alarmed. For the most part, my rig with 250 k on her sounds exactly like that. Warmed up it's a bit quieter, but when I start my girl cold you have to look at the neighbors windows and hope they hold.

Drive it like you stole it.

Denny

 

You got it right, the only two times it has done that to me is when it was below zero (once in Reno, NV and other time in NM).