Every diesel engine makes its own noises. Mine could sound different than yours does. If its not exibiting any misfires or rough running, no SES light I would just keep your ear to it and see if it changes any for the worse. If there is a misfire on a diesel you will know it. Other than that welcome to the 6.0 forum and check out the tech folder at the top of the page. If you can get a hold of Bismic he has some great spread sheets he will send you on tips and tricks for the 6.0....lots of great reading in there. Good luck with the new truck and enjoy it.
Sarge
