4.0 Head Swap - 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 > 4.0 Head Swap

NEW JK WRANGLER GRAB BARS NOW at ROCKRIDGE4WDRear Disc Brake Conversion Kit- TJ,YJ,XJSWAG 50 Cal Ammo Can Mount With M2A1 Can

Reply
Unread 01-09-2009, 09:17 AM   #1
j33pman
Registered User
1984 CJ7 
 
Join Date: Jun 2007
Location: Cobleskill, NY
Posts: 936
4.0 Head Swap

I notice that we have a stickied write-up for a 4.0 swap
but no official write-up for a 4.0 head swap.

I've read some info and write-ups from other sites,
but I am wondering how these have held up after a few years
and any issues people have run into.

just to clarify, I'm not asking for 4.0 head swap information and I
do know how to use the search button,

I'm asking someone to sticky a 4.0 head swap write-up with
a detailed parts list and issues ran into.

If no one has one that we can sticky, I will step up to the task when I start mine and make a write-up for us to reference

__________________
Bill H. - 1984 CJ-7
Now with Fiberglass!
My Rebuild thread
http://www.schohariecountyjeepclub.org
j33pman is offline   Reply With Quote
Unread 02-05-2009, 06:45 AM   #2
sgtbookie
Registered User
1982 CJ5 
 
Join Date: Jun 2007
Location: Atlanta, GA
Posts: 767
Just started researching this and found your post Bill. Have you started your conversion yet?
__________________
__________________
- 1982 CJ5 -
AMC 258 TeamRushed, MC2100, T-176, Dana 300, Goodyear AT 31's, AMC AM Radio, SuperTop, Tuffy Stereo Console , Black Diamond AT Shocks , CJ Draw Bar, Herculiner
sgtbookie is offline   Reply With Quote
Unread 02-05-2009, 07:40 AM   #3
CJ Chet
Registered User
1986 CJ7 
 
Join Date: Dec 2005
Location: Yorktown, Virginia
Posts: 2,575
Here is something I found:

http://jeep.off-road.com/jeep/articl....jsp?id=277013
__________________
Beer is the answer - it doesn't matter what the question is!

'86 CJ7, 265 CI, DUI, TF999, Borla, Weber, 4" BDS Lift.
'04 AEV RUBICON.
'00 TJ Sahara.
CJ Chet is offline   Reply With Quote
Unread 02-05-2009, 07:52 AM   #4
foggybottombob
Registered User
1984 CJ7 
 
Join Date: May 2008
Location: Monument Colorado
Posts: 5,821
There used to be a definitive write up on the internet by a guy named Tim Weaver. But it appears that all the Tim Weaver web pages are gone now. That is what I used to do my 4.0 head swap a few years ago. I have not had any problems with the 4.0 head other than making the intake manifold not leak air.
__________________
J-4000 truck Dana 60-2 brake parts for sale. Drums, backing plates & other parts
foggybottombob is offline   Reply With Quote
Unread 02-05-2009, 11:19 AM   #5
Houdini
Registered User
1984 CJ7 
 
Join Date: Oct 2006
Location: South Lake Tahoe, CA
Posts: 153
Here's a link to the old Tim Weaver write up:
http://web.archive.org/web/200601120...ead/40Head.htm
__________________
'84 CJ7
'03 Overland
98 other cars/trucks/vintage trailers owned previous to CJ (Scary isn't it!), no wonder I'm broke
Houdini is offline   Reply With Quote
Unread 02-05-2009, 01:18 PM   #6
foggybottombob
Registered User
1984 CJ7 
 
Join Date: May 2008
Location: Monument Colorado
Posts: 5,821
Quote:
Originally Posted by Houdini View Post
Here's a link to the old Tim Weaver write up:
http://web.archive.org/web/200601120...ead/40Head.htm
That link credits the 4.0 head with adding 40 hp. The old article I read said 25 hp. I think the 25 hp is closer to reality. I remember talking to the Clifford performance guy on the phone about the head change years ago and he was guessing it would make 20% over bone stock. That would be 23hp. So I think 40 is a bit unrealistic. But add an upgraded ignition and you get at least another 5.
__________________
J-4000 truck Dana 60-2 brake parts for sale. Drums, backing plates & other parts
foggybottombob is offline   Reply With Quote
Unread 02-05-2009, 01:31 PM   #7
GPER
Registered User
1979 CJ7 
 
Join Date: Oct 2005
Location: Dayton, Ohio
Posts: 1,805
The 40 would be with the FI on the 4.0 head swap. I think the main issues would be using the putty in the water jackets. I had mine drilled, tapped and plugged but mine is still on the engine stand.
GPER is offline   Reply With Quote
Unread 02-05-2009, 02:56 PM   #8
foggybottombob
Registered User
1984 CJ7 
 
Join Date: May 2008
Location: Monument Colorado
Posts: 5,821
I used a clearwater FL head and it appeared to have the extra holes welded and ground flat.
__________________
J-4000 truck Dana 60-2 brake parts for sale. Drums, backing plates & other parts
foggybottombob is offline   Reply With Quote
Unread 02-05-2009, 03:07 PM   #9
Bubba Ray
Registered User
1984 CJ7 
 
Join Date: Dec 2005
Location: SC
Posts: 1,656
I would love more info on this swap. Will be doing it soon.
Bubba Ray 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.