I have a 2003 3500 Dually Common Rail with the 305 hp motor. It has an auto tranny. This is my first diesel truck and I dont know much about them. I just got it last year. It has 138k on it. I just put a new head and #6 piston in it. And now this crap. Good thing I got it pretty cheap. When I start my truck up it starts smoking. Its not just a lillte puff, it stays steady pouring out. Its coming out of the blowby tube. Its a blueish color. Someone told me its an injector. It continues even when it gets warm. I tried dumping lucas injector cleaner in but hasnt done anything yet. Its been about 2 days for the lucas stuff. Its been blowing this smoke out for prob. 2 weeks. Dont know how much longer it will last. Does anybody have any injectors or know of someone that can get one? Any help is appreciated. Thanks

 

check ebay there is a few for sale now.

 

pull yours out and clean them i did mine they had a lot of carbon on them even on the tips it sure runs better now. is it missing on any cyl?
just an idea.

 

If you have visible smoke coming from the blowby tube its usually a bad sign-prob galled cylinder on #6-usually associated w/ piston failure-prob all related to a bad inj. intially.

 

sounds like a galled cylinder 5 and 6 are prone to it