I think I have a big problem on my hands guys. I just picked up an 2004 6.0, 70k on the clock, never had anything done to it except exhaust, so I am told. I drove the rig 140 miles, pulled up to a stop light....to a really rough idle. limped through the light, truck died about 200ft from light. wouldnt restart at first. let it sit for awhile, started it back up to find white smoke pouring out of the exhaust, and not clearing up at all. I shut it down after about 8 seconds. pulled the dipstick to find a smell I was hoping wouldnt be there, coolant. How many options are there for whats wrong and will it running for that short time make things worse than I am assuming they already are? thanks for any and all help. I have had this truck for not even 48 hours, not a good way to start things off with my powerstroke!!