I just bought a 03 dodge with a 305/555 engine in it and want to put a 325/610 engine I have in it. Has anyone done this swap? I need to find out if I put all the 03 electronics on the 05 engine if it will work right in the 03 truck.

I have been told that the pistons are different fron a 03 to a 05 and that might be a problem, but I just can't see it not working right if I use everything off the 03.

If you have done a swap like this please let me know how it went and anything I might need to know before I start.

Thanks CRIS

 

For 20HP and 55tq, I think thats a rather ridiculous swap. Get a tuner and you'll get way more than that.

 

The 03 has 202000 miles on it and the 325/610 engine has 24000 miles on it. That is the reason for the swap, plus I'm going to be racing the 03 and want a engine in it as close to new as I can. I already have the 325/610 in my garage.

CRIS

 

I know that I will have to put 03/04 injector tips on the injectors so the spray pattern will match the pistons, but I still want to know about the rest of the parts.

Isn't there anyone out there who has done a swap like this?

CRIS

 

Ecm's are differant as well as the wastegate on the turbo and the turbo itself.03 is a manual waste gate and 05 is electronic.Not sure how it would be controled with differant ecms and wiring.At least I think thats just some differances.

 

The turbo isn't a issue, because the truck will end up having TWINS like my 2005. My goal is to try to get the truck down to 5000lbs with frame mods and a short bed.

My main issue is will a 05 long block work in a 03 truck?

CRIS

 

I'm sure theat the block will bolt up th the chassis but I remember reading that there are many electronics that are required for the new engine to run. You might want to post this question worded differently, something like swapping an 03 for an 05 engine, what do I need to make it work? Of something like that. I think that unless you have the complete donar truck you might be fighhting an uphill battle from what I remember reading. Good luck.

 

What is so hard to understand???????????????????? I have a 03 that I'm driving, and I just want to know if a 325/610 long block will be OK to install in the 03.

 

what is so hard to understand is that u have been told no it will not run right and yes it will bolt up. face it u are looking for that one guy that wikk say what u want to hear. we have tryed to help u now be a big boy and make your own call. just my .02

 

If you don't want to hear what has been said don't post asking for an answer. As above putting the 03 electronics on the later engine will more than likely result in an engine that will not run. Beside the difference in injectors, the piston tops are different, the cooling oil spray under the pistons is different, the HP & Torque ratings are close but different, The third injector event is different and part of the engine running correctly, I believe that the fuel rail is somewhat different, the wastegate issue, the different turbo and the list goes on and on....If you don't like the info go ahead and install it and when it dosen't start of run don't again ask for help, it may not be here. As I tried to tell you above, have read and been told that the ECM is different, and that there may be other computers from other parts of the donor truck required to make it run. If you just want to swap long blocks then I would suggest a call to a Cummins shop to see if it is even feasiable to do, that is without spending more than the cost of just rebuilding your existing engine and putting a smarty or other chip on it to give you as much or more than the newer engine has. Then you can sell the newer engine to help pay for the rebuild. These things are not like the older gassers where you just bolt them up and hook up a few wires and they run. They are carefully controlled electronic controlled engines and if you don't know what your are doing and don't have the right kind of help that know all the tricks it won't happen and if the attitude from your above post is how you are going to go about it, good luck. I see you either walking or driving your 05 quite a while in your future.

If you don't like this answer then don't ask the question........

 

Get a 12 valve if you're gonna build it for racing.

 

I guess from what everyone has told me in this post, if you or I own a 03 or 04 cummins and the engine blows up with less then 100,000 miles we should throw the truck away because cummins more then likely won't go back and build the 03/04 motors for a replacement and we can't put a 04.5 and newer one in our 03/04 trucks (that sucks)

I can tell you this much, everything that bolts to the engine is the same(CP3, rail, intake and so on) The 03/04 have different ECM's/PCM's and injectors which can be changed to match the pistons.

I just hate to think of all the 03/04 trucks that might have a engine go bad and there is no replacement for the 235/250/305hp engines.

CRIS

 

Cris, It will run in there with 03 ecm on it but the pistons on 05 motors are best used with the 3rd injection event. I have heard several people say it runs but there is power problems. Have not tried it myself but I trust the peoples input I have heard on the issues. Build The 555 motor. Sell the 05 and most of the costs are a wash. We can pull the 03 head if it looks good we will leave the bottom end alone. Good chance even with 200k on it it will be fine and a good base to race. Tim

 

Hey cris. Yep u got it if you motor blows up cummins doesnt have the ability to rebuild any motors. **** man u dont get it do u. IT WONT WORK IN A NOTHER TRUCK. It will work in the truck it was made for witch is a 05. That been said take it to cummins and have them rebuild the motor for you. So this way u will have a new motor. O wait i forgot cummins dont know how to rebuild motors. Your screwed.

 

The 305 DOES have 3 injection events and it does have the cooling passages in the pistons.
Why wouldn't the 325 work with ALL the electronics from the 305 installed on it? swap the 305 ECM and all its sensors to the 325, remove the wastegate solinoid and block off the boost sensor on the 325's turbo.
you do have to keep the 325 injectors in it though.
the engine doesn't care what runs it as long as the ECM is happy (with all its sensors intact).