4.0 to 4.0 HO Swap Help! - JeepForum.com
LinkBack Thread Tools
post #1 of 2 Old 09-26-2001, 10:04 PM Thread Starter
Registered User
Join Date: Sep 2001
Location: San Diego
Posts: 1
4.0 to 4.0 HO Swap Help!

My 89 4.0 has a nock and the mechanic says he's sure its from a piston. So Im thinking since I can pick up a low milage 4.0 HO long block for around 500 what changes do I need to do? One person I talked with did not think that the intake/ exhaust were the same if this is the case can a 4.0 HO short block be used with a regular 4.0 head?
Thanks for the help

JeepMe is offline  
Sponsored Links
post #2 of 2 Old 09-29-2001, 10:07 AM
Registered User
Join Date: Sep 2001
Location: FL
Posts: 162
first off dude, if you have an 89 YJ with the stock motor, then you have a 4.2 L engine that has a carb. I don't know anything about the 4.0 vs 4.0 HO, they might be the same thing for aLL I know. If you have the 4.2 the swap to a 4.0 EFI head would be a great swap. Good luck


95 YJ 2.5L 5 Speed

Fightin a war against Florida Rust!
Brendan is offline  

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com 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 e-mail 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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
I6 to V8 swap - Direct swap? tawdr77 Engines & Drivetrain 2 01-17-2010 10:35 AM
Will my 258 engine swap..... swap? Toady1 Engines & Drivetrain 1 11-09-2009 08:08 AM
8.8 swap CreepyCrawler95 Engines & Drivetrain 2 03-22-2009 08:06 PM
AMC 360 swap flashfludjr Engines & Drivetrain 1 03-22-2009 10:50 AM
Help...D44 to 60 Swap ADay73 Engines & Drivetrain 1 08-22-2007 06:17 PM

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
Trackbacks are Off
Pingbacks are On
Refbacks are On

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