I'm a new member and looked through most of the forums but didn't see anything about an engine swap. I have an '01, Durango with a 4.7l enginewith 250,00 miles (love the truck). Power suddenly went down, took it to a dealer and they did a compression check and I have 0 compression in one of the cylinders. Since they gave me no trade in value I thought I would fix it myself when is gets warmer. My question is probably premature since I haven't broke the engine down yet, but can you swap a 5.2l or 5.7l engine into my truck without much or any modifications?

 

If you're asking will it fit? then technically a 5.2 or 5.9 will fit in...(no idea about a 5.7L hemi though)...however remember that the transmission, exhaust, and a BUNCH or wiring is different between the engines... possibly the rad as well...

if you got 250000 mi out of your current 4.7, why are you looking to swap the 5.2 or 5.7? lack of compression can be a wide range of reasons... if the cylinder heads are fine (valves, springs etc...) it may just be a piston ring, that has bitten the dust...

if you have the funds to pull off a swap of this proportion, i suggest looking into what the problem on your current engine is... 250,000 mi, a good engine builder could refresh that for you and you'll be good as new... bore it over, rebuild the heads with new springs, even put a more aggressive cam in there and you'll have more power than before...

hopefully this wasn't overkill for you haha..

 

Dano

The 5.7 swap is doable, but the one successful transplant I have seen so far still has issues to work out. I agree with Deerang that swapping to the older 5.2 or 5.9 is going backwards. As you know, if cared for the 4.7 is a good motor. You should be able to find a nice lower mileage motor to drop in while you dive into the old one at your leisure.

That would also get your D back on the road fairly quickly.

Just my thoughts Don

 

Just bore the original motor out about 30 to 40 thousandths over. But a small bit bigger cam in it and have the heads polished and ported a small bit. You'll have the power you want for sure.

Swap from 5.2L to 5.9L is bolt up but you have some issues with the computer. The blocks are the same. There might be other small problems associated with the transplant.

The 5.7L is the new Hemi. One word (Nightmare) so don't even think of it.

 

Heck, it may be possible to get the new 2007-2008 high output 300+HP 4.7 engine replacement?