Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum > 2.5L to 4.0L Engine Swap

Join Wrangler Forum Today

Thread: 2.5L to 4.0L Engine Swap Reply to Thread
Post Icons
You may choose an icon for your message from the following list:

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


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.

Additional Options
Miscellaneous Options

Topic Review (Newest First)
01-09-2007 05:44 PM
1BLKJP 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.
01-09-2007 05:20 PM
Texapple 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.

01-09-2007 02:14 PM
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.

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

All times are GMT -5. The time now is 07:41 AM.

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