Engine swap

[Cbreeze1982]

Will a2003 5.7 Hemi install in a 2005 with a 5.7 , without any major changes, was told it wouldn't work but what I've seen it will just double checking before buying the 05, thanks guys

 

[HemiLonestar]

Do you have a 1500 or 2500/3500? 2003 doesn't use EGR, neither does 2005 2500/3500 but 2005 1500 does.

 

[Scottly]

IIRC, the 2003 1500 I had used a unique ECM...It didn't have that cylinder cut-off function. Ran like a scalded dog, but you couldn't tune it.... Mitsubishi made the ECM for it, IIRC.

 

[HemiLonestar]

If you mean unique in that it had an untunable separate ECM and TCM then yes, it was.......unique lol. Of course it didn't have "that cylinder cut-off function" (or MDS as it is more commonly known) because trucks didn't get that until 2006.

 

[Lyle Longboat]

Hey, I have the same question, will a 2003 Dodge Ram 1500 5.7 fit/connect to a 2005 Dodge Ram 1500 5.7 or what needs to be modified for any of the engine swapping gurus?

 

[Lyle Longboat]

I got a 2003 5.7 for buttons, guy just wanted it gone. going to tear down to block and rebuild it and toss it in my 2005 that’s on its way out..

 

[HemiLonestar]

Your truck uses EGR, the 03 engine does not have it. You either need to swap the passenger side head or open up the port. Will need to use your 05 intake manifold & injectors (03's run lower fuel pressure, 04-08 have different injectors because of this) since it will have the EGR hole. Otherwise it's a drop in.

 

[Lyle Longboat]

Thanks!