4.0L into 4.2L ?? - JeepForum.com
Search  
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 > Models > Jeep CJ Forum > 4.0L into 4.2L ??

ROCKRIDGE4WD Introduces a NEW Jeep Wrangler JK *led* tail 99-04 Jeep Grand Cherokee Laredo Dark Headlights Clear Cor99-04 Jeep Grand Cherokee Laredo Chrome Headlights

Reply
Unread 01-15-2002, 10:46 PM   #1
clint_black_jeep
Registered User
 
Join Date: Jan 2002
Location: Amarillo, TX
Posts: 8
4.0L into 4.2L ??

I'm thinking of swapping a late-model 4.0 into my tired 258-powered ride... Any of you guys ever tried this at home? Successfully? Any tips/advice would be appreciated. This would help me pass any unforseeable emissions tests, improve mpg and cold starts, & maybe boost the hp a little.
Thanks-

__________________
'85 CJ-7, bone stock exc. 2" shackles & Skyjackers. Engine is 258 (for now). Nutter bypass.

"Just because you're not paranoid doesn't mean they ain't out to get you"
clint_black_jeep is offline   Reply With Quote Quick reply to this message
Unread 01-16-2002, 12:19 AM   #2
clint_black_jeep
Registered User
 
Join Date: Jan 2002
Location: Amarillo, TX
Posts: 8
Sorry, guys, that shoud have been under engines...
__________________
'85 CJ-7, bone stock exc. 2" shackles & Skyjackers. Engine is 258 (for now). Nutter bypass.

"Just because you're not paranoid doesn't mean they ain't out to get you"
clint_black_jeep is offline   Reply With Quote Quick reply to this message
Unread 01-17-2002, 08:26 PM   #3
hamyscj
Registered User
 
Join Date: Dec 2000
Location: Mount Joy, Pa
Posts: 283
I am in the process of doing this right now. However, I cheated alittle because I had the mopar MPI kit on my 4.2. I had all the wiring and intake already set up. There are a few things you need to know. First, plan on using the 4.0 accessories. ie power steering, alt, A/C, etc. The 4.2 accessories will not fit. Esp the P/S. The motor mounts and bell housing to block bolts are a perfect match. The only thing I had to do was to use a 7/16 bolt on one hole of the left mount into the block. For some reason it was tapped different. Unless you buy a bellhousing with the sensor mount on it, you will need to fab a bracket for the crank sensor. You will need to get a bronze pilot bushing for the trans of the CJ machined down to 1 inch OD in order to fit into the crank of the 4.0. There are probably some things that I am missing so if you have questions, feel free to email me. Hamy.
__________________
One Way Up Racing
Romans 10:9
hamyscj is offline   Reply With Quote Quick reply to this message
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.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

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.


Thread Tools






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.