4.2 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 10-15-2012, 11:03 PM   #1
Join Date: Sep 2012
Posts: 1
4.2 Engine Swap

Hello Jeep heads. I am new to this forum, and have some questions. I have had a 95 Wrangler in the past, and I just bought a broken down jeep. It is a 1990 Wrangler YJ with the 4.2 with standard Trans. Are there any engines besides the 4.2 that will easily interchange without having trans and transfer case issues? Does the 2.5 or the 4.0 bolt up to the trans? Will the whole 4.0 engine and trans combo have issues lining up with the transfer case? Or should I just continue to look high and low for a 4.2. (not finding any) Thanks

Faithfuldad3 is offline   Quote
Old 10-16-2012, 12:04 AM   #2
banks316's Avatar
Join Date: Apr 2011
Location: Longview, WA
Posts: 2,095
One thing you can do is get a 4.0L and put your intake and exhaust on it will have little less power but you should be fine.

93 YJ I6 5spd
My YJ Build +1.5 inch SOA ,37 12.50 15R Swamper M16's, 5.22:1/2.97:1 Stak Tcase with 92 Crawl Ratio--------SOLD...
banks316 is offline   Quote
Old 10-16-2012, 02:50 AM   #3
Join Date: May 2012
Posts: 247
Throw the 4.0 head intake and exhaust and fi on the 4.2 and live the mini stroker life lol
bangingears 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

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 03:26 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2016 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