4.0L head on 4.2L block - 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 head on 4.2L block

FS: Jeep Fog Light LED Bulbs! Several Brightness Options! SPARTAN LOCKERS are on sale BIG TIME at ROCKRIDGE 4WD!Yukon Ultimate 35 axle kit for c/clip axles with Yukon Zip

Reply
Unread 05-26-2003, 07:00 PM   #1
Boiler
Registered User
1984 CJ7 
 
Join Date: Apr 2003
Location: Tampa, FL
Posts: 116
4.0L head on 4.2L block

Anyone done the 4.0L head conversion on their 258? What were the results? Was it worth it? Was filling the water jacket holes a pain in the butt?

My 258 is shot and in need of replacement. I want to keep the 6 cyl but looking for more muscle.

Boiler is offline   Reply With Quote
Unread 05-26-2003, 10:41 PM   #2
CJeep
Alpha dog
 
CJeep's Avatar
1982 CJ8 
 
Join Date: Apr 2001
Location: Near Fairfield, CT
Posts: 1,210
It's great to ask questions, I would say they are the main reason for a forum like this. That being said, try a search here, Google, and also jeepsunlimited.com is a good place. This has been discussed many, many times, and the web has several articles on it.

I will be doing this swao towards the end of the summer.

Good luck
__________________
'82 Scrambler - NV4500/4.5" lift/33" Toyo MTs/4.0/twin stick, and my windshield washers work! Full 1/2 cab Cage

2004 Grand Limited 4.7 HO - OH Boy!

2010 Grand Laredo 5.7 Hemi - SICK - work vehicle -gone - replaced by an 08 Tahoe - nice ride.

"Both my Doberman and my Jeep can accurately be described as 'black and rust.'"

"I got a fever . . . and the only prescription is more cowbell"
CJeep is offline   Reply With Quote
Unread 05-27-2003, 09:52 PM   #3
Marcj7
Registered User
 
Join Date: Dec 2002
Location: Mount Vernon, WA
Posts: 47
here are some links for you:

http://monsterslayer.com/jeep/40Head/40Head.htm

http://www.off-road.com/jeep/new/40conv.html

I wouldn't waste my time and money doing this swap on an engine in need of a rebuild though.
__________________
80cj7, locked and geared
Marcj7 is offline   Reply With Quote
Reply
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.