2002 short box rebuild questions - JeepForum.com
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > General Technical Discussions > Engines & Drivetrain > 2002 short box rebuild questions

6th annual beat your wife to the credit cards sale!!Get ready!! CyberMonday deals are coming!!!Last few hours of great savings JeepHut.com

Unread 11-28-2007, 12:38 AM   #1
Registered User
2002 KJ Liberty 
Join Date: Nov 2007
Location: BC, Canada
Posts: 3
2002 short box rebuild questions

Hi, the liberty I bought with 56000Km ended up having piston slap and under warranty the dealer replaced the entire short box. Before the rebuild I was getting approximately 100km on 16L in the city, but since the rebuild it has nosedived to 21L. I know that fuel economy usually is bad following a rebuild until the engine gets worn in but i have since put on 5000 km.

Does anyone have any advice for me? I know jeeps aren't great on fuel, but I really think this is outside the normal limits. Also, I have to drive very carefully to squeeze that fuel economy out - no speedy accelerations, speeding, etc.

At first i thought it could be tires - I do have an aggressive BFGoodrich all terrain tire on. Do tires make that much difference, most people say no. Besides, same tires before the rebuild and resulting decrease in fuel economy. HELP, PLEASE!

aber16 is offline   Reply With Quote Quick reply to this message
Unread 11-28-2007, 03:15 AM   #2
Trouble Maker
reckless endangerer
Trouble Maker's Avatar
1993 ZJ 
Join Date: Jan 2006
Location: Lloydminster, SK Canada
Posts: 751
The term is "short block" not short box, meaning basically the engine block, crank and pistons.

Metric sucks! Not sure why your mileage dropped from 15 mpg US to 11 mpg US though.
02 Dakota Quad Cab 4.7 5 spd

93 ZJ Stolen and wrecked Mar29/08
Trouble Maker is offline   Reply With Quote Quick reply to this message

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.

Thread Tools

Suggested Threads

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.