2.5L to 4.0L Engine Swap - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 01-09-2007, 01:14 PM
Thread Starter
DustyJeep's Avatar
Join Date: Jun 2006
Posts: 11
DustyJeep is on a distinguished road
2.5L to 4.0L Engine Swap

Ok, I got a big question for all the Jeepers out there with more experience than me, which amounts to almost every member here! I want to swap my 2.5L in my 1995 Wrangler for a 4.0L. I haven't chose a year most likey a 94,95, or a 1996 Cherokee. I have a 999 auto tranny and I want to know what I need from the doner vehicle and I wonder what else I need for the swap ie: motor mounts, computer, wiring. Any help would be greatly appriciated. I'm in my first year of my ASE certification and I have the know how to swap an engine but not the experience.
Never pee into the wind with your mouth open!
DustyJeep is offline   Quote
Old 01-09-2007, 04:20 PM   #2
Texapple's Avatar
Join Date: Nov 2005
Location: New Jersey
Posts: 2,631
Texapple is on a distinguished road
This sounds like cheating (like on a school test). I need your instructor's name and phone number to verify that providing this info is allowed.


got rid of the husband.....bought another Jeep

my new spotter
Texapple is offline   Quote
Old 01-09-2007, 04:44 PM   #3
Jack Lives Here!!!

WF Supporting Member
1BLKJP's Avatar
Join Date: Apr 2005
Location: Phoenix, AZ
Posts: 7,764
1BLKJP is on a distinguished road
I don't know if you have emissions testing in your state, but if you do then you are going to have to use a motor of the same year or newer. If you are swapping in the 4.0 then you might as well put in a fuel injected 4.0 in it as well. I'm a little sketchy on what year they started putting the HO 4.0's in Jeeps, but it would be well worth it. Hackle on this board has done this swap in about a week and used a 98 4.0 into his YJ I believe.

But yes you are going to have to relocate your motor mounts, and you will need the wiring harness, computer etc... The more parts that are useable off the donor vehicle the better.
Jack Hickman

President - Arizona Off-Highway Vehicle Coalition
Vice-President - ASA4WDC
Arizona Rock Rats
1BLKJP is offline   Quote

Thread Tools

Posting Rules
You may not post new threads
You may not 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
rebuilding your engine?? Get Stroked!!! jeeper95yj YJ General Discussion Forum 6 01-01-2014 04:47 PM
Engine Swap 90cheroeke 4.0 Auto Into 94 Wragler 4.0 Manual rich solberg TJ General Discussion Forum 8 06-14-2011 07:56 AM
2.5l swap to 4.0l yjwrangler YJ Tech Forum 24 10-12-2008 07:53 PM
intresting info on the 4.0L TB swap... foxinthemudd General Jeep Discussion 10 03-10-2008 11:37 PM
YJ Engine Swap Fuel Question ckonash YJ Tech Forum 3 10-15-2007 07:59 PM

All times are GMT -5. The time now is 05:37 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC
« Back

Enter your email address:

Delivered by FeedBurner