02 2500hd. With the 6.0. On cold starts in headinrg a knockin noise. Just wondering if anyone on here had an idea what it could be. Im praying its not gonna throw a rod. Truck has 170k on it

 

sounds silly, but check your motor oil. by cold starts do you mean cold days, or engine has cooled down to outside temp?
sounds like your motor oil is draining down b/c you don't have enough motor oil so your truck is taking a few minutes to lubricate

 

it's not uncommon for a high mileage truck to slowly burn motor oil

 

Oil is in check. Its leaking and i canf find out from where becuase its all over the underneath the truck

 

Cold start as in first start up in the morning or after its cooled down

 

is it a loud knock, or more of a ticking?
ticking= could be stuck lifters.
knocking=possibly main bearing of oil pump
did this knocking/leaking start after a recent oil change? or has it been happening for a while now?

 

either way, sounds like a severe case of "dry start": could have negative consequences in terms of engine life