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Old February 24th, 2006, 06:50 PM   #1
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Default 4.0 head on 4.2 block

Anybody on here ever do this, or know of someone, or a shop, that will do it for me?? LMK Not sure I am confedent enough to do it myself.
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Old February 24th, 2006, 07:42 PM   #2
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You want to talk to FullGobble.
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Old February 24th, 2006, 08:49 PM   #3
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no onw on here by that name
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Old February 24th, 2006, 11:25 PM   #4
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FullThrottle.


Explanation: http://www.misfitoffroad.com/phpbb/viewtopic.php?t=5094

:tonka:
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Old February 25th, 2006, 10:05 AM   #5
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From what I've read, this swap looks pretty easy. Some basic tools, a torque wrench, and very limited knowlege about engines is all you should need.
I say "go for it".

Heres a good link with all the steps:

http://monsterslayer.com/jeep/40Head/40Head.htm
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Old February 27th, 2006, 08:46 PM   #6
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i did this swap on my cj-5 its not to bad had to block off a few water jackets and had to modify my clifford intake also had to use 4.0 push rods ive read somethings where people said to use 4.2 pushrods but when i did they where to short jeep would not get rpms above 2500 and it clatterd real bad but i corrected all that and i would have to say it gained atleast 35hp also had to use exhaust manifold (header style) from 4.0 if you have any questions let me know
joe
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Old March 1st, 2006, 09:30 AM   #7
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Found a head all set up for $200, about 200 miles sence it was rebuilt, sound like a good price???
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