Ok guys how can you tell the difference if you have a 2004 or a 2004.5 truck production date 2/04 motor 325 hp CTD . for the 2004.5 what is the HP? Is my truck considered a 2004 or 2004.5? this has stumped me I am about to order some parts for my truck and I am not sure what motor i have got. with the 325 hp its a 2004. and the 2004.5 is supposed to have like 390hp I heard that from a guy that gets 32 mpg on his dodge 2500 ctd YEAH RIGHT he's a Bull Sitter
going by the production date 2/04 is past the half way point 6/04 would be a 2005. so if i am thinking correctly anything past 12/03 is considered a 2004.5 YES?????

 

Look on the driver side of your engine. On there by the valve cover will be a sticker with engine specs. It will either say engine HP 305 or 325. If it is a 305 you have an 04. If you have a 325 you have a 04.5 engine. More widely known as the "600" series Cummins.

There is no 390 stock 5.9 engine... and yes he is probably a bull sitter haha

 

yeah the serial tag I know what that is. but since he was saying that i don't have the head for the 600 series And after talking with him about it its supposed to have 600 hp out of the gate. HA HA HA yeah Cummins isn't going to have a 600 hp motor in a 5.9 (factory) so yeah bull sitter. or really don't know what he is talking about. I work on cummins engines 5.9 6.7 industrial we don't have the emissions crap. HP on engines I work on 235 at 2200 rpm they are turned down. I just didnt know what the hp was supposed to be for 2004 or 2004.5. I have a 2004.5 motor that's what I wanted.
I tried looking up on cummins dealer website at work and it only shows you that you have a 325 hp serial# the basic parts list when the engine was made where it was made BS like that.
Thanks
but now that changes things around for parts I'm sure