[Blazin Den]

i have seen alot of people posting about how to put a 4.0 in the YJ. So i have done the best i could at 1:30 am to help some people out. here is a list of sites that will help you do the 4.0 swap.

General Info on the 4.0 swap
http://www.cjoffroad.com/forums/topic.asp?TOPIC_ID=1097
http://jeep.off-road.com/jeep/article/articleDetail.jsp?id=277042 (bottom has link to wiring information)

2.5 to 4.0/AW4/242 using 1992 XJ Donor into 1995 (Tomb Raiders Swap)
http://jeepforum.com/forum/showthread.php?t=514821

2.5 to 4.0/AW4 into 1989 YJ ( Big N Brokes Swap )
http://www.jeepforum.com/forum/f12/finally-my-turn-4-0-aw4-swap-my-89-yj-good-bye-2-5-a-462517/
http://www.jeepforum.com/forum/f12/time-change-everything-low-center-gravity-makeover-yj-updated-w-pic-461242/

4.0 Renix Swap
http://www.freewebs.com/billsbuckets/pastprojects.htm

1987 YJ 2.5 to 4.0
http://www.4wdandsportutility.com/tech/0908_4wd_1987_jeep_wrangler_yj_engine_swap/index.html

1987-1990 2.5 TBI 5spd wrangler using 4.0 OBD1 1994 Cherokee with automatic Transmission
http://cjoffroad.com/forums/topic.asp?TOPIC_ID=14839

90 YJ 2.5/ax-5 using a 93 YJ 4.0L and TF999 automatic transmission
http://www.bc4x4.com/tech/2003/jeep25-40/

93 2.5 using 93 xj 4.0/ax-15 (Leans93 Swap)
http://www.jeepforum.com/forum/f12/leans-4-0l-swap-complete-pics-668796/

94 YJ 2.5 to YJ 4.0 using a 92 YJ with the 4.0L HO motor and AX15
http://www.jeepaholics.com/tech/25to40/25to40.htm

2.5 to 4.0 using 94 HO
http://www.jeeps-offroad.com/f40/engine-swap-31795/

OBD2 Info

2.5 to 4.0 using 98 OBD2/AX 15 from 93 into 91 YJ (roccomonte swap)
http://www.jeepforum.com/forum/f12/4-0swap-build-thread-899497/

4.0 Swap using OBD2 information along with other links to other swaps
http://wilhelm-tech.com/jeep/mods/40EngineSwap.htm

4.0 Swap using OBD2 with donor being 98 XJ 4.0/aw-4/np-231
http://www.madois.com/html/tech/40swap.html ( need to find the new link doesnt work right now)

4.0 Swap using OBD2 1999 TJ 4.0L OBD2 engine into a 1994 XJ 4.0L HO
http://bb.bc4x4.com/showthread.php?t=132488

4.0 from 2000 TJ into 89 YJ
http://www.cjoffroad.com/forums/topic.asp?TOPIC_ID=7781&whichpage=1&SearchTerms=ev ap%2Cpurge

97 XJ wire harness and splicing info
http://wilhelm-tech.com/jeep/mods/WiringConnectors.htm
http://wilhelm-tech.com/jeep/mods/HarnessSplicing.htm

99 TJ 2.5 to 4.0 swap using 6cyl/5spd trans/t-case/computer/harness (RnEmOvr swap)
http://www.jeepforum.com/forum/f9/2-5-4-0-swap-underway-576008/
http://www.jeepforum.com/forum/5461933-post20.html


4.2 to 4.0 using 95 xj (yjcrawlr swap)
http://www.jeepforum.com/forum/f12/90-4-2-95xj-4-0-swap-build-thread-681707/

4.2 to 4.0 (cevans87 swap)
http://www.jeepforum.com/forum/f12/4-2l-fuel-injection-build-1114875/

4.2 to 4.0(Fenix85182 swap)
http://www.jeepforum.com/forum/f12/4-0-swap-mismatched-harness-block-years-1136267/

4.2 to 4.0L
http://www.rockcrawler.com/ // go to the tech section,look under motor section for YJ 258 to 4.0L Motor Swap
http://www.bc4x4.com/faqs/yj.cfm?cat=5&faqid=138
http://www.coldspeed.net/forums/showthread.php?t=4372
http://jeepforum.com/forum/showthread.php?t=455084
http://www.4x4wire.com/jeep/tech/engine/fi40swap01/

4.0 Head Swap on 4.2
http://www.monsterslayer.com/pages/jeep/40Head/40Head.htm Tim Weaver's swap
http://www.bustedjeep.com/projects/rebuild.asp
http://www.geocities.com/035jeep/40L.html
http://jeephorizons.com/phpbb/viewtopic.php?t=2542
http://www.northeastsurf.com/4.0%20head%20swap.htm
http://jeep.off-road.com/jeep/article/articleDetail.jsp?id=277013
http://www.northjerseyjeepclub.org/modules.php?name=Forums&file=viewtopic&t=2182
http://www.cjoffroad.com/forums/topic.asp?TOPIC_ID=16650&whichpage=1
http://jeepsunlimited.com/forums/showthread.php?p=8138668#post8138668
http://www.northjerseyjeepclub.org/modules.php?name=Forums&file=viewtopic&t=2182

OBD2 to OBD1
http://www.cjoffroad.com/forums/topic.asp?TOPIC_ID=786

OBD1 to OBD2
http://bb.bc4x4.com/showthread.php?p=863296

Junkyard GM TBI Install on 4.2
http://www.bustedjeep.com/projects/junkyardtbi.asp
http://jeepforum.com/forum/showthread.php?t=676393
http://www.bustedjeep.com/projects/junkyardtbi.asp
http://www.justih.org/Binder-Bench/s...ead.php?t=6489


Stroker Info
http://www.angelfire.com/my/fan/stroker.html
http://www.jeep4.0performance.4mg.com/stroker.html
http://www.rockcrawler.com/techreports/stroker40/index.asp

i am sure there are more write ups available and other people might post them up. These will hopefully help people that are trying to find information about different engine swaps.

[crb577]

not a write up but i have a bunch of photos from when I did mine people can get the general idea that the mounts do have to be cut and new ones welded in at least.

http://rides.webshots.com/album/444691195crgxlO

hope that will help someone

[paulzwieg]

Lots of good info on these links I'll be busy reading before I make the change.

[Hainze]

Lots of good info

[Blazin Den]

some more people have been asking about a 4.0 swap so i thought i would bump this back to the top. let me know if any links do not work and i will fix them.

[Blazin Den]

i edited some stuff and added some new links. I will try and fix some of the headings for the links to make them easier to read and find.

[paulzwieg]

I'm in the process of putting a 2000 4.0 out a Cherokee in a CJ. Can't wait to do the wiring. LOL

[green89yj]

has anyone spelled out what the 5 to fire wires everyone is talking about are and how they are hooked up? I thought since this was already made, it would be a good place to have basic information like that.

[Bastidjeep]

Originally Posted by green89yj

has anyone spelled out what the 5 to fire wires everyone is talking about are and how they are hooked up? I thought since this was already made, it would be a good place to have basic information like that.

You need a constant 12v to the steering column. Key on 12v(ignition) Key on start (starter relay) The ignition should power your Power Distribution center relays such as the fuel pump relay which will be your 4th wire. Mine started with 4 unless I am forgetting something....I am not sure exactly how specific you need what you are asking?

[green89yj]

that helps. Mine is OBDII so the starter and fuel pump relays are actually grounded not energized to close but that helps. So you had to do what to send 12 volts to the steering column?

[green89yj]

hey. what if I used the cab and engine side of a cherokee bulkhead connector, would that make my life a little easier? Does anyone know how to remove the lock cylinder and could I replace it with my YJ one?

[topgun6969]

where would i find information on cross referencing different year jeeps and which parts work with what

[gf70sShow]

nice

[papashaps1]

I looked at all the threads and have done some searching and I am not finding what I need. I swaped the origonal 4.2 in my 87 YJ for a rebuilt 4.2 from an either 89 or 90. I thought is would be an easy swap. I have hooked up all of the matching connections under the hood but now I have some "extra" wires that have no place to go on the new engine. Anyone have any idea were I can see a picture or diagram of what all the connections from my YJ go to? I really appreciate any help you all could give me. If you need pictures or more detail I will be back home on Saturday and can post them at that time. Thanks again.

[bword]

thanks for this