2005 engine interchange

[thaddad]

Could anyone tell me the actual difference in a 325 engine in 2005 in front of an auto vs. a standard of either kind or an industrial. I have a 2005 3500srw 4wd truck with a g-56 trans, I bought as a project. It has a very deep knock (rod) and oil pressure falls off when warm. Seems to run smooth Has 242,000mi. and a sketchy service history. Im wondering if these other 325 engines would fit or if I should pull this apart and fix it. seems like the clutch works fine,but, I would not be against the idea of a solid flywheel conversion if it needs a clutch or if that lets me use a 5600 or auto engine. Thanks ahead of time for any help. Tim Haddad

 

[HBarlow]

I am not an expert and could be wrong but believe that all Cummins ISB5. 9 engines used in Dodge Rams from mid-year 2004 (2004. 5) through 2007 and bearing the 325hp tag are identical and can be interchanged. The ECM/PCM are probably different between manual and automatic trucks but could be swapped.

 

[mwilson]

Could anyone tell me the actual difference in a 325 engine in 2005 in front of an auto vs. a standard of either kind or an industrial. I have a 2005 3500srw 4wd truck with a g-56 trans, I bought as a project. It has a very deep knock (rod) and oil pressure falls off when warm. Seems to run smooth Has 242,000mi. and a sketchy service history. Im wondering if these other 325 engines would fit or if I should pull this apart and fix it. seems like the clutch works fine,but, I would not be against the idea of a solid flywheel conversion if it needs a clutch or if that lets me use a 5600 or auto engine. Thanks ahead of time for any help. Tim Haddad

I'd pull it down and see what you have there, might not be too bad.



It would save dealing with the little issues that pop up if a donor engine is not out of an identical truck.



Also, by saving and repairing the existing engine you will know what condition it is in compared to installing a take-out engine from somewhere else.



Worth a look IMHO.



Mike.

 

[n9oig]

I do know that 2004. 5 325 2wd 6 speed man and a 2005 4x4 auto are the same I did the swap a few years ago the wire harness is different and so is computer but all are bolt on and plug in parts all the sensers were the same direct plug in too.

 

[ColemanR]

Well I can tell you from experiance that an 06 auto and standard are differant. Its easy to get around now that I have been thru it. Buy a smarty and Bob Wagner can make the puter work. Dealer told me not a chance it will work 15 min later I drove my truck out of his back lot.

 

[cerberusiam]

Engine in the LD truck realm will pretty much interchage without issues across models and years. A 2003 will work in a 2007 and a 2007 will work in a 2003, manual or auto.



The industrial and MD applications are basically the same engine and components but the mounting in the chassis is a bit different. That will require swapping front covers and possibly other mods but it is doable.



A CR engine from a Dodge will go for around $5000 slavage and simply requires swapping all the harnesses, sensors, etc, from the old engine to the new. If there is minimal damage like say a rod, piston, and 1 cylinder needing sleeved its probably cheaper to rebuild so you know what you have.



If there is more damage to the crank and other cylinders then it becomes a tradeoff in cost and reliability for a reman as opposed to cost and reliability of used.

 

[thaddad]

Thanks everyone for the advice,I suspected the common rail engines were all interchangeable save fuel systems and software. I now have to find time, and space to get the engine out and see if I can salvage it !!! Funny how when all you do 60 or 70 hrs. a week is fix vehicles its all you can do to touch your own in all your spare time. Thanks, Tim

 

[mwilson]

Engine in the LD truck realm will pretty much interchage without issues across models and years. A 2003 will work in a 2007 and a 2007 will work in a 2003, manual or auto.



The industrial and MD applications are basically the same engine and components but the mounting in the chassis is a bit different. That will require swapping front covers and possibly other mods but it is doable.



A CR engine from a Dodge will go for around $5000 slavage and simply requires swapping all the harnesses, sensors, etc, from the old engine to the new. If there is minimal damage like say a rod, piston, and 1 cylinder needing sleeved its probably cheaper to rebuild so you know what you have.



If there is more damage to the crank and other cylinders then it becomes a tradeoff in cost and reliability for a reman as opposed to cost and reliability of used.

To add to Cerb's comments above, if you tread into MD territory and are calling around for used engines make sure that you specify Front Geartrain.



I still have not found out what dictates Front or Rear Geartrain in the 6. 7L engines.



I have a Reman 6. 7 here that just showed up for a bus and it is rear geartrain.



Mike.

 

[cerberusiam]

I have a Reman 6. 7 here that just showed up for a bus and it is rear geartrain.

To add to what you added, don't most the MD applications use a front mount off the front cover and a midmount on the engine adapter as opposed to motor mounts?

 

[rscurtis]

Since the 305 and the 325 engines have different pistons, injector tips and programming, how would you get around a change from an '03-'04 engine to an '04. 5 or later engine?

 

[cerberusiam]

Depends on which way your changing and how exact you want to be. The ECU doesn't know or care what mechanical components are attached, it just runs its pre-built program for timing, duration, and pressure.



Either swap and the engine will run just not optimized.



In some cases you cna use a programmer to shape the injection event to better suit the setup, in others its requires something like EFI live to do.