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Is the 04 4300 a dependable truck I know the later maxforce engines are bad along with the dt466E but is the 04 good to go ? Shop is saying it's a dt466 how can I tell the difference between the regular and E variants
 

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04 is a break year. The early one is the typical E. The later 04 is the newer style used up to 08. Bonus being, the newer one can use the Hypermax performance module. Bonus with the older one is being able to convert back to mechanical if you were looking for ultra reliability with power potential. Not that they were that bad, it's just an option. Quick fix on the newer gen is to block off the EGR.
Easy way to tell the difference between the 2 generations: Newer one has EGR crossover tube wrapping around the front of the engine. It's about 1.25-1.5" OD.
 
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