The difference between an 04 and 04.5
#2
There are a few power outputs on the 04 cummins look for a tag on the valve cover that tells you the HP of the engine. 305hp is the HO there was also a SO engine.
on the 04.5 the tag on the valve cover will say 325hp. Plus the 04.5 has a 4inch exhaust turbo back vrs 3 1/2 on the 04. The 04.5 came with a factory cat. build date for the 04.5 I believe started in January of 04
on the 04.5 the tag on the valve cover will say 325hp. Plus the 04.5 has a 4inch exhaust turbo back vrs 3 1/2 on the 04. The 04.5 came with a factory cat. build date for the 04.5 I believe started in January of 04
#3
#5
A stock, and unflashed, 04.5 is 325HP/600TQ...610TQ was a later 05 thing. DCX did reflash the early 04.5s for "performance and mileage" (a listed TSB) and that supposedly gained you the 610TQ...but I never saw an improvement, and if anything; the truck didn't run as well after the reflashing.
And I have read where guys claimed to have a later 04 with the 305HP HO with a factory 4-inch exhaust without a cat...
The biggest identifier of a 04.5 is the engine tag showing a rating of 325HP and the presence of the large catalytic converter in front of the muffler.
#7
Huh??? There is no difference in blocks in any of the CR's. Valves, valve seats, pistons, injectors, cams, and piston coolers are the differences depending on what motor and build date.
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