will a 2007 5.7 hemi work in place of a 2005 5.7 hemi

Asked by Jan 29, 2015 at 10:01 AM about the 2005 Dodge Ram 1500

Question type: General

I have a 2005 1500 that has a 5.7 hemi that is blown I have a 2007 1500 with a 5.7 hemi will it work?

7 Answers


Yes, absolutely.

do you know if I would have to change out the ecm and the wiring harness?


I don't think you'll have any problem with using the existing wiring harness but the PCM should be reprogrammed for the correct VIN if you swap it, but you might be able to retain your old one. Everything should bolt right into place. Dodgetalk.com and Ramforum.com have dedicated threads to engine swaps for Dodge trucks. I don't see anything that would keep you from bolting the new engine right into place.

thank you

Cluke78 did you successfully change the engine? without any mod? i’d Love to know as i’m going to do the same and i can’t find much info on the net. please hit me up if you can or reply to this thread.

Is an 07 5.7 out of a truck the same as a. 5.7 out of a 05 dodge magnum

The 07 will have MDS as Dodge rams were introduced to the Multi displacement system in 2006 up i believe. The intake is different as you have 4 mds selonoids that needs to be blocked. the Valve cover will need to be changed and also the timing cover, not sure about the oil pan. The 2007 will bolt into place as my mechanic did it without any mods. i’m just waiting on the a starter and a valve cover and the engine blocker plastic tabs thing, i forgot the part number. We will then start it up using the ignition system from the 2005 as the computer will not read the 2007 ignition system that’s why we swapped the intake and the valve covers. I’ll let you guys know how it turns out and if it goes well. The 2007 engine was low mileage and cheaper than the 2004-2005 engine so that’s why i went with that.

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