3.9 to 5.2 Swap - Dodge Durango Forum and Dodge Dakota Forums
5.2L/5.9L/6.7L Engines Questions regarding the 5.2L/5.9L/6.7L V8 Engines

Reply
 
Thread Tools Rate Thread Display Modes
post #1 of 23 Old 02-09-2006, 10:24 PM Thread Starter
02daksxt
Semper Fi
 
02daksxt's Avatar
 
Join Date: Dec 2005
Location: Fredericksburg, VA
Vehicle: 2002 Dodge Dakota
Modifications: 3/2 Doetch Lift, 3in Add-A-Leaf, 31x1050x15 Kumho KL78 ATs wrapped on 15x8 U.S. Steel Wheels. Dwights TB, 10x2 Round K&N Filter, Superchips 3715, Flowmaster Single Exhaust
Posts: 760
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
3.9 to 5.2 Swap

OK, So I am going to save money instead of puttin in a better system or lowering it and all that. I want to put in a 5.2. What I want to know is how much it cost, and anything else I'll need. Also, will my stock 5 spd work with the 5.2? I have the nv3500 I beleive. Thanks guys.

02daksxt is offline  
Sponsored Links
Advertisement
 
post #2 of 23 Old 02-09-2006, 10:27 PM
2k2dakotaman
Ridin Dirty
 
Join Date: May 2004
Location: Hammond,Louisiana
Vehicle: Dakota
Posts: 13,323
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Send a message via AIM to 2k2dakotaman
didnt you want to put a 4.7 in it before?


2002 Dakota R/T, Red, 255/50/R17 chrome R/T wheels,B&G Flashed ,Flowmaster,Round Element Filter, M1 Intake, F&B TB52mm, SS Grill Inserts,AutoLite Plugs,Msd Wires,2 Peice diamond headlighs and corners....more to come


2k2dakotaman is offline  
post #3 of 23 Old 02-09-2006, 11:28 PM Thread Starter
02daksxt
Semper Fi
 
02daksxt's Avatar
 
Join Date: Dec 2005
Location: Fredericksburg, VA
Vehicle: 2002 Dodge Dakota
Modifications: 3/2 Doetch Lift, 3in Add-A-Leaf, 31x1050x15 Kumho KL78 ATs wrapped on 15x8 U.S. Steel Wheels. Dwights TB, 10x2 Round K&N Filter, Superchips 3715, Flowmaster Single Exhaust
Posts: 760
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Originally, yes I did. But after some reading and thing I came to the conclusion that doing a 4.7 swap would just be to expensive. First, from what I've read, the 4.7 only had 5 more hp and 5 more ft/lb than the 5.2, 2nd, the 5.2 basically drops right in (with the proper items of course.) I'm just wondering what else I need besides the wiring harness, computer, and the engine of course.

02daksxt is offline  
post #4 of 23 Old 03-03-2006, 11:57 PM
OklahomaDakota
Rick James Dakota
 
Join Date: Feb 2006
Location: Oklahoma
Vehicle: Dodge Dakota
Modifications: snow skiing, snow, camping, off roading, my wife, money, in that order
Posts: 51
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Send a message via AIM to OklahomaDakota
Same

I am Also needing Here. Have the 3.9 and want the 5.2, but I myself have never done an engine swap and I keep getting mixed reviews...hearing fit will take from one 10 hour workday to 6 weeks or 12 hour weekends. Of course NONE of the guys I have talked to have actually done the swap so I am weary.

I have figured out from several sources the 318 is by far the easiest swap otherwise I would go bigger (4.7 or 5.9). I am looking for easiest way to get the v8.... I have a 98 dak 4x4 CC What parts will I need? thanks thanks!
OklahomaDakota is offline  
post #5 of 23 Old 03-03-2006, 11:59 PM
KREWZER
I AM SERIOUS!!!
 
KREWZER's Avatar
 
Join Date: Aug 2005
Location: Manhattan, KS
Vehicle: BAGII
Modifications: Rollpan, Throttle Body, Clears, Lowered, Exhaust, MSD...
Posts: 5,030
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Send a message via AIM to KREWZER Send a message via MSN to KREWZER Send a message via Yahoo to KREWZER
engine, wiring harness, PCM, time and money. The motor mounts are the same and the NV3500 will bolt right up to the 318. then all u have to do is have fun :biggthump

'96 Lapis Blue RC 5.9L V8 5spd Dakota Sport
KREWZER is offline  
post #6 of 23 Old 03-13-2006, 05:53 AM
College_Dakota
Registered User
 
Join Date: Mar 2006
Location: Phoenix, Arizona
Vehicle: 2000 Dakota Reg Cab 4x2
Posts: 268
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
the mounts

The mounts are the same from 3.9 to 5.2? Did not know that

Sorry to thread hijack but, what about the I4? I assume it needs it all, new mounts/tranny/engine/pcm/wiring/etc etc
College_Dakota is offline  
post #7 of 23 Old 03-13-2006, 06:05 AM
98_R/T
my tires rub.....
 
Join Date: Feb 2006
Location: The Empire State
Posts: 531
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Quote:
Originally Posted by College_Dakota
The mounts are the same from 3.9 to 5.2? Did not know that

Sorry to thread hijack but, what about the I4? I assume it needs it all, new mounts/tranny/engine/pcm/wiring/etc etc
Yup, you will have a little more work to do. The guys with the 3.9 have basically the same motor as the 5.2, just with the front 2 cly cut off. So they could just use the same motor harness and pcm for a while and just splice in 2 more injectors. It would run, not great but would work for a bit till you got a pcm and harness :biggthump

JP
98_R/T is offline  
post #8 of 23 Old 03-13-2006, 07:27 AM
College_Dakota
Registered User
 
Join Date: Mar 2006
Location: Phoenix, Arizona
Vehicle: 2000 Dakota Reg Cab 4x2
Posts: 268
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
ya

Figured I had a "little bit more work", I'm still bummed the 5.9l doens't work well with the nv3500..

Oh well, the 5.2l will be a nice change once I drive this 2.5l into the ground.
College_Dakota is offline  
post #9 of 23 Old 03-13-2006, 02:16 PM
94 V-6 4x4
Registered User
 
Join Date: Feb 2006
Location: Michigan
Vehicle: 1994 Dakota
Posts: 29
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Unless there's someone willing to give you a 5.2 for free, go with the 5.9. The amount of work is the same and you get more HP, which is always a good thing. :biggthump
94 V-6 4x4 is offline  
post #10 of 23 Old 03-13-2006, 08:57 PM
realdeal7369
G.F.Y racing president
 
realdeal7369's Avatar
 
Join Date: Apr 2005
Location: philly, pa
Vehicle: 2005 dodge magnum rt
Modifications: Cold air intake.
Posts: 9,401
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Send a message via Yahoo to realdeal7369
so if the 5.2 fits, why wont the 5.9? motors are the same, just bored out a litle different thats all. to real difference on the outside that could see.

i went with the 5.2, got it at a nice price too. all i need to do is get the machining done, then get the cranks kit, and cam. already have the harness, computer, headers, m1, injectors, and anything that will swap from my 3.9 to the v8. (usually all the accessories and stuff

1997 dakota, 5.2v8, msd wires, trans cooler, K&N cai, 1.6 rr's, stinger 1700 battery, updated big 3. aeroturbine 3030 muffler, high flow cat. conv
---------------------------------------------------

Last edited by realdeal7369; 03-13-2006 at 09:06 PM.
realdeal7369 is offline  
post #11 of 23 Old 03-13-2006, 09:33 PM
98_R/T
my tires rub.....
 
Join Date: Feb 2006
Location: The Empire State
Posts: 531
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
You could go with a 5.9 if you have the nv3500. But good luck finding a fly wheel for that. The swap would be easier with a 5.2 IMO. And is what most people choose to do.

JP
98_R/T is offline  
post #12 of 23 Old 03-13-2006, 10:36 PM
FuryUs
Registered User
 
Join Date: Apr 2004
Location: OKC
Posts: 90
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
The flywheel's not that hard to find--just get one for the same year 2500 Ram 360/5 speed. Look on car-parts.com--they're about $125 used.
FuryUs is offline  
post #13 of 23 Old 03-14-2006, 02:49 AM
janesy
Registered User
 
Join Date: Feb 2006
Location: ontario
Posts: 363
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
5.2 and 5.9 are physically the same size, however they are balanced differently. 318 being internally and the 5.9 externally. So when you get the motor just make sure it comes with the flywheel. And also note that the flywheel pattern was changed in 95.

Wiring harness wil work fine, you will have to tap for two more injectors, which your V8 computer, which you do require, is already ecuipt with.

NV3500 is notorious for breaking under power, that is why it was never offered behind the 360. But, a rebuilt one will work for you. There is no perfomance upgrade offered for it unfortunatly. so why not just up to the NV4500? the gearing sucks!

So basically anywhere that a 318 will fit, so will a 360, but they do need some changes between the two.

And BTW, the 4.7 uses a completly different computer system and require you the rewire almost all of your existing wiring. not very economical, and then you are stuck with a motor that is good, but as of yet hs very little in the way of performance backing.

Shameless plug time, I do have a complete freshly rebuilt 318 for sale. Just broken in.
janesy is offline  
post #14 of 23 Old 03-18-2006, 09:53 PM
College_Dakota
Registered User
 
Join Date: Mar 2006
Location: Phoenix, Arizona
Vehicle: 2000 Dakota Reg Cab 4x2
Posts: 268
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
.

Thing about the 5.9l swap is that your just gonna eat transmissions all day long.. from what i've read(so my info is as good as they are.) the nv3500 barely takes the 5.2l.. the 5.9l would destroy it.

Wish there was a way to toughen the nv3500 for abuse of a built 318..
College_Dakota is offline  
post #15 of 23 Old 03-18-2006, 10:00 PM
FuryUs
Registered User
 
Join Date: Apr 2004
Location: OKC
Posts: 90
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
What about the NV4500? Anybody tried that?
FuryUs is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Dodge Durango Forum and Dodge Dakota Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:


Forum Jump

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

 
For the best viewing experience please update your browser to Google Chrome