Jeep Garage  - Jeep Forum

Jeep Garage - Jeep Forum (
-   Engine Performance/Intake/Exhaust (
-   -   Engine swap (

jdb2797 09-20-2011 04:54 PM

Engine swap
I currently have the 4.0l I6 in my 03 WJ. What all would it take to swap it out for a 4.0L HO? price estimates? places I can find the necessary parts?

01grand 09-21-2011 03:44 PM

Re: Engine swap
A lot more money than its worth. Just my 2 cents worth sorry but either version of the 4.0 is still a little underpowered for the heavy GC. You could always try to swap in a 4.7L HO V8, but that would require a 545rfe tranny and also a lot of work.

kmitch80 09-21-2011 03:53 PM

Re: Engine swap
Not worth the time or the money. Bore it .040 over, throw in a ported head & intake, new cam....even crank if you want and you're torque will be improved 100+hp. I didnt do the intake or crank, (i should have) but on my 95 WK with the 4.0, pretty much the same motor, it increased my power significantly. Cost me $1500 to do it my self. And then i blew the motor because it overheated and my Temp gauge wasnt working. (my fault) But it was definitely stronger while it lasted. In the process of rebuilding again.

jdb2797 09-21-2011 04:15 PM

Re: Engine swap
sorry about that. I meant the 4.7L HO. Mitch do you have any suggestions about these things your recommending I replace. I mean in terms of where to get them, whats the best product to use, things like that?

kmitch80 09-21-2011 04:42 PM

Re: Engine swap
so you're wanting to go from the 6 to an 8.... thats a bit more detailed. 70 Hp and 100ft lbs of torque difference. Again.... for the price you're going to pay for swapping, engine mounts, tranny etc. you're looking at 6-7 grand would be my guess. If you do all the work yourself, thats different. Go forced Induction and call it a day!
Here is a good place to start with either a stroker or FI.

kmitch80 09-21-2011 04:47 PM

Re: Engine swap
BTW here is where i got my rebuild kit a couple years ago. It was nice because you just tell them what size you want everything (rings, cam etc) and they send it to you at no extra charge. And you cant beat the price.

jdb2797 09-21-2011 05:05 PM

Re: Engine swap
What would you recommend, a stoker or FI? If I choose to stay with the I6 that rebuild kit would be my best bet in terms of improving performance?

kmitch80 09-22-2011 11:58 AM

Re: Engine swap
FI would be the easiest. Bolt it on and you're done. Now how good of shape is your I6 in? You can beat the crap out of those motors and they keep running. I would say go F/I, run it until somethin breaks, then you can get the rebuild kit, build a fresh new motor, strap the blower back on be good for another 100K.

jdb2797 09-22-2011 07:05 PM

Re: Engine swap
ill get a picture up tomorrow of under the hood so you can see. Everything looks like its in pretty good shape.

jdb2797 09-24-2011 05:24 PM

Re: Engine swap
I've never dealt with FI's what would you recommend?

jdb2797 09-24-2011 05:59 PM

Re: Engine swap
2 Attachment(s)
heres what under the hood looks like

DrLocke 09-24-2011 06:18 PM

Re: Engine swap

Originally Posted by jdb2797 (Post 489636)
heres what under the hood looks like

Looks like your engine is already FI. What are you trying to accomplish? Have you considered trading yours in on one with a V8?

All times are GMT -5. The time now is 09:23 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community