79 j10 258 into my 86 CJ7 - JeepForum.com
LinkBack Thread Tools
post #1 of 2 Old 05-08-2013, 07:19 PM Thread Starter
Registered User
1986 CJ7 
Join Date: May 2013
Location: Lake Geneva
Posts: 2
79 j10 258 into my 86 CJ7

Has anyone out there put an older 258 into a newer CJ7? I can get a rebuilt j10 258 motor on the cheap with only 200 miles on it to replace my 86 258 with 143k on it. Is it a hard swap, or can it even be done?

TheCrusher is offline  
Sponsored Links
post #2 of 2 Old 05-09-2013, 01:07 AM
Registered User
1981 CJ5 
Join Date: Aug 2009
Location: Delta
Posts: 91
Unsure about the j10 258 but the older CJ 258 will mount right in. I can't imagine AMC making them much different. You will want to use your intake an exhaust manifolds though. The newer manifolds will be set up for elect choke, heater, ect. I believe you will have to lengthen your wire for the elect temp sending unit. On newer engines the sender is at the back of the head older ones its at the front.
Hope this helps.

Sent from my DROID RAZR HD using JeepForum

81 CJ5 258/T18/dana20/ARB locked diffs/33's
80 CJ7 258/auto/d 44 diffs/ 4" lift/rebuild started 80 CJ7 #2 stock(sold)
82 CJ7 stock DD
CJuncky 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

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