No the 03 wont work in the 04 for the same reason the 04 wont work in the 03. Separate PCM and TCM in the 03 make the swap not possible. The only direct swap motor besides an 04 he could do is an 05.

 

That makes no sense compared to weeds post. Pretty sure the motor does not care that the PCM is different. Unless they changed any of the sensor styles or locations (doubt it) then it should work. Even with the MDS motor just un MDS it with the lifters from the 03 to 05 Hemi. I was eyeing up a 2006 Hemi from an HD (no MDS) and all the sensors that I could visibly locate looked all the same.

 

I just like ur truck af....lol.

 

You can even use a MDS engine, just the MDS will not function. You can use your older coil/plug wire set up along with your valvecovers unless you want to rewire all of the coils like weed did on his. If you do get a MDS engine, just be sure to use 5w20 oil only.

 

id buy a new crate motor with a warranty and not have to worry about it, my 4.7 blow crate cost little over 4000 from carquest i rebuilt it myself for 3800 and dont have a warranty not worth it

 

If you get an 03 engine, remember that 03's don't have EGR.

 

I just bought a 4.7 long block reman for $2,300 and the cheapest used motor was $2,400...

Check out http://www.powertrainproducts.net they sale reman's and used motors with good warrantys and free shipping.

*I do not work for them. I just bought my motor from them and I am very happy with there service...*

 

hey manitobahemi did you find an engine for your truck i might have found an 04 in saskatchewan.

 

Hold tight buddy.
What happened to you is a COMMON PROBLEM with 2004 5.7 hemis.
This happened to me last week, rod when through the block for NO GOOD REASON. I keep 100% maintenance on my '04 Durango. I told myself this is just a fluke, bad luck. Know guys that race their Hemi Dodges and put NOS to it with no problem.
BUT looks like this problem is particular to 2004 5.7 Hemis.
There is enough people with expensive trucks and Durango that are rendered junk that there should be a class action law suit.
Go to the NHTSA web site and register a complaint.
Check this out if you don't believe me.

http://townhall-talk.edmunds.com/WebX/.f1dd4b2/1

Read the posts in that thread. You will be highly pissed because your truck took a dump for a likely KNOWN PROBLEM that are not going to fix.

 

you can use a 2003-2005 Motor as a direct replacement.The mds on the 2005 won't work with your wiring harness,and there is only one difference between a 2003 and 2004 motor,other than the TCM..that is the oxygen tube that runs from the front head to the intake manifold on the left looking at the motor from the front..If you find an 03 take the one off your old motor.You're right about the 8th digit Any 8 will work..