5.2l - 5.9l differences and more - JeepForum.com
 
LinkBack Thread Tools
post #1 of 3 Old 07-05-2006, 06:34 PM Thread Starter
Wookie06
Registered User
1996 ZJ 
 
Join Date: Jul 2006
Location: Clarksville, TN
Posts: 126
5.2l - 5.9l differences and more

I've been told in the past that the 5.9 is basically a 5.2 with different heads. Does anyone know if that is the case? I'm not the smartest guy when it comes to Chrysler engines. I'm interested because I am starting to think forward to what I will do when my 5.2l engine fails. I really don't expect it to but with over 160,000 miles I want to have a plan in place so that I don't end up with more down time than necessary.

Also, what bolt on (non-turbo/supercharged) options are a must for this engine. Obviously a better breathing airbox but what about manifold or throttle body changes? Headers? Exhaust? I'm looking forward to turning some wrenches on this thing when I get home from Iraq so I'm basically looking for ideas right now. I'm also interested in computer changes. I remember doing some research a couple years ago and options for programming the factory computer seemed limited. Is that the case?

Wookie06 is offline  
Sponsored Links
Advertisement
 
post #2 of 3 Old 07-05-2006, 06:51 PM
zaq123
Registered User
 
zaq123's Avatar
1941 JK Wrangler 
 
Join Date: Jul 2004
Location: here
Posts: 4,006
Quote:
Originally Posted by Wookie06
I've been told in the past that the 5.9 is basically a 5.2 with different heads. Does anyone know if that is the case? I'm not the smartest guy when it comes to Chrysler engines. I'm interested because I am starting to think forward to what I will do when my 5.2l engine fails. I really don't expect it to but with over 160,000 miles I want to have a plan in place so that I don't end up with more down time than necessary.

Also, what bolt on (non-turbo/supercharged) options are a must for this engine. Obviously a better breathing airbox but what about manifold or throttle body changes? Headers? Exhaust? I'm looking forward to turning some wrenches on this thing when I get home from Iraq so I'm basically looking for ideas right now. I'm also interested in computer changes. I remember doing some research a couple years ago and options for programming the factory computer seemed limited. Is that the case?
I'd just drop another 5.2 in there. Won't have to mess with the transmission, PCM etc.
But if you are serious and have some time on your hands we have a few folks here who've done it.

http://www.nagca.com/grandtech/52and59comparison.htm
zaq123 is offline  
post #3 of 3 Old 07-06-2006, 09:01 AM
HighLonesome
Belief In All Things Jeep
 
HighLonesome's Avatar
1995 ZJ 
 
Join Date: Feb 2005
Location: New Mexico
Posts: 6,791
The 5.9 has more stroke and a little more bore than the 5.2, thus superior torque throughout the powerband. I just dropped a 5.9 long block into my 94. Everything fit from the old 5.2 except the driver's motor mount, flexplate, and harmonic balancer. Even the stock PCM will run the motor, but won't get the most out of it. Best mod ever.
HighLonesome is offline  
Reply

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









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
differences between '02 4.0 and '96 4.0? Crewdude007 ZJ Grand Cherokee Forum 1 02-24-2009 02:25 PM
Differences in...? adgjqetuo ZJ Grand Cherokee Forum 4 01-29-2009 02:47 AM
Why so many 98 differences? UltimatE ZJ Grand Cherokee Forum 4 10-06-2007 10:04 AM
what are the differences? Grdaemon ZJ Grand Cherokee Forum 16 07-06-2007 03:25 PM
Differences between 4x4 and AWD 97GrandCherokee ZJ Grand Cherokee Forum 41 12-20-2006 08:00 AM

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