I took on the Impossible! They said it couldin`t be done! I put a 6.0. and running gear into my 1987 crew cab. I`ve been driving the truck problem free 4 the last 2 yrs. Just recently I gave her an oil change and new fuel filter`s. The next day I went to fire her up and wow I thought the engine was going to grenade!!!! She settled down then ran normal after 5 minutes. I thought maybe glow plgs. I plugged her in the next day started fine! the next day I tried with out pluging her in, same thing I thought she was going to grenade! after 5 minutes she was fine!! does anybody have any idea what it could be!!
My guess is that you are using too heavy weight oil for the weather up your way. Run a synthetic oil (5W40) next time. I run Rotella Syn and it is good stuff. You can get it at Wal Mart. No unusual noises on start up.