The list of which 4.0L Jeep motor will fit your Jeep

Discussion in 'General Tech' started by Blaze, Oct 12, 2016.

  1. Blaze

    Blaze The Jeeper Reaper

    Joined:
    Aug 9, 2005
    Location:
    Wake Forest, NC
    Came out of a thread in the general chat. Here's the comprehensive list of what motors will fit which Jeeps.

    1987-1990 Jeep Cherokee XJ 4.0L
    Renix motor - you can use 87-90 4.0L
    91-01 XJ, 93-98 ZJ, 91-95 YJ, 97-99 TJ You will need to relocate temp sender to thermostat housing from HO motor. Also need to use all your Renix accessories, distributor, flywheel/flexplate, etc. 00-01 is not recommended due to crappy head. Some people say the 0331 isn't as bad as people say. We scrap Jeeps, more than likely if we get a 0331 head Jeep in the head is cracked, well over half the high mileage 00-01 ones we get in have this problem.

    1991-1999 Jeep Cherokee XJ 4.0L
    87-90 XJ - Renix motor, lower power output, not recommended
    91-01 XJ, 93-98 ZJ, 91-95 YJ, 97-99 TJ (read 87-90 XJ section above about 0331 head issues on 00-01 XJ)

    2000-2001 Jeep Cherokee XJ 4.0L
    00-01 XJ
    You can also use 91-01 XJ, 93-98 ZJ, 91-95 YJ, 97-99 TJ engines, but you will need to purchase separate coil pack adapter brackets since the 00-01 is a coil pack motor and earlier engines do not have mounting provisions. It would be cheaper and easier to just find the correct 00-01 motor.

    93-98 Jeep Grand Cherokee ZJ 4.0L
    87-90 XJ - Renix motor, lower power output, not recommended
    91-01 XJ, 93-98 ZJ, 91-95 YJ, 97-99 TJ (read 87-90 XJ section above about 0331 head issues on 00-01 XJ)

    99-04 Jeep Grand Cherokee WJ 4.0L
    99-04 WJ, 00-06 TJ - 2002 and up were TUPY heads and did not have the cracking problems that earlier 0331 heads had. 02+ are recommended.

    1991-1995 Jeep Wrangler YJ
    87-90 XJ - Renix motor, lower power output, not recommended
    91-01 XJ, 93-98 ZJ, 91-95 YJ, 97-99 TJ (read 87-90 XJ section above about 0331 head issues on 00-01 XJ)

    1997-1999 Jeep Wrangler TJ/LJ
    87-90 XJ - Renix motor, lower power output, not recommended
    91-01 XJ, 93-98 ZJ, 91-95 YJ, 97-99 TJ (read 87-90 XJ section above about 0331 head issues on 00-01 XJ)

    2000-2006 Jeep Wrangler TJ/LJ
    99-04 WJ, 00-06 TJ - 2002 and up were TUPY heads and did not have the cracking problems that earlier 0331 heads had. 02+ are recommended.

    There you have it, please let me know if anything is wrong here. This was all gone off of by memory and experience here in the shop. I think I got it all correct but if anyone finds issue let me know and I'll update it. Also, some motors might have slight wiring differences with the temp gauge wiring because after 96 they stopped putting them in the cylinder head. You can either use a 96+ thermostat housing and extend the wire, or you can drill and tap your existing housing and extend the wires. You can also be brave and drill and tap the head. I'd rather do the housing and extend the wire and not risk it.

    There are also some other differences with swapping HO motors into Renix Jeeps and the other way around, most of it is gasket related and easily remedied with using the correct gaskets.

    Hope this helps some people!

     
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  2. Mac5005

    Mac5005 Welding Instructor

    Joined:
    Oct 19, 2005
    Location:
    Rocky Mount
    Thanks for putting all that together.

    So I take it there are no differences in motor mount bosses in the blocks but only difference in mounts?
     
    Last edited: Oct 12, 2016
  3. DSM Turbos

    DSM Turbos Well-Known Member

    Joined:
    Feb 25, 2006
    Location:
    Raleigh, NC
    Can the OPDA TJ's from 05/06 swap into a pre 05? For some reason I thought they can't, or well easily can't.
     
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  4. Blaze

    Blaze The Jeeper Reaper

    Joined:
    Aug 9, 2005
    Location:
    Wake Forest, NC
    No, the bosses in the blocks are different in the 99-04 WJ and the 00+ TJs compared to XJ/ZJ/YJ/early TJ, that's why they won't bolt in. Technically, you can make them work with some fab work, but it's not like 4.0s in the correct arrangement are hard to come by.

    From what I understand, the longblock is the same, you just need to use the sensors and all off of the year you are doing. You can put a pre 05 into it if you use your 05+ sensors and vise versa.
     
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  5. Jody Treadway

    Jody Treadway Croc wearing fool Moderator

    Joined:
    Mar 20, 2005
    Location:
    Hendersonville, NC
    Yes the long block absolutely does. BTDT.
    Thanks for putting this together @Blaze
     
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  6. Mac5005

    Mac5005 Welding Instructor

    Joined:
    Oct 19, 2005
    Location:
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    Ttt so I don't have to search to find This.

    Again huge Thanks for putting all this together. I have used it multiple times.
     
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  7. jdpitre89

    jdpitre89 New Member

    Joined:
    Nov 16, 2017
    Location:
    Colorado

    Hey there. I am about replace the motor in my 1998 XJ with the motor from a 98 TJ. According to most things I have discovered, the blocks are the same, and the belt driven accessories should plug and pray, along with wiring. I was a bit hesitant because I can't see the motor in person, although the photos I have seen are mint. What got me questioning the compatibility was the belt driven accessory arrangement, the clutch fan in particular, is a bit different. But it seems like I will be able to install the same AC/Alternator bracket that holds the clutch fan pulley from my XJ right onto the TJ block which will give me the same arrangement as the original set up.

    I also noticed that my block number is 53010449AA, the 1999-2001 casting while the 1998 casting number is only 53010449, according to:

    Racing Rods - Builders Have Many Options From Which to Choose - Engine Builder Magazine

    However, my engine serial number is 806MX09, which should 09/06/1998 build date.

    Either way, I just want to make sure the new motor will be a perfect match. I would appreciate any input.

    Thank You!
     
  8. jdpitre89

    jdpitre89 New Member

    Joined:
    Nov 16, 2017
    Location:
    Colorado
    Just found out the TJ block casting number is 53020569. Which makes perfect sense since it is a 98 TJ.

    How can I find out the differences as far as mounting and bolt on accessories if any with my '99 casting #53010449AA that is in my '98 XJ.
     
  9. marty79

    marty79 Well-Known Member Banned Twice Already

    Joined:
    Dec 2, 2015
    Location:
    Newton NC
    98s will both be the same..99-05 4.0s are different so as long as that TJ is for sure 98 manufacturing date, your good.
    (Easy way to tell is compressor ...if a/c compressor is mounted bottom right looking at front of motor, you can't use it. If its mounted on left than ur good)
     
  10. shawn

    shawn running dog lackey of the oppressor class Administrator

    Joined:
    Mar 13, 2005
    Location:
    Raleigh, NC
    This is incorrect.

    Blaze's year breakdowns at the top of the page are correct.
     
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  11. marty79

    marty79 Well-Known Member Banned Twice Already

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    Newton NC
    My bad 99-06, I put 99-05.
     
  12. Jody Treadway

    Jody Treadway Croc wearing fool Moderator

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    Hendersonville, NC
    No
    You're still wrong
     
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  13. marty79

    marty79 Well-Known Member Banned Twice Already

    Joined:
    Dec 2, 2015
    Location:
    Newton NC
    Yeah I know WJ & TJ are one year difference of beginning diff blocks (99vs00).
    Either way, was trying to help the OP know his TJ motor will work in his XJ! Sorry to make it so complex
     
  14. rich060685

    rich060685 New Member

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    Jan 27, 2018
    Location:
    Pennsylvania
    Just out of curiousity... I see there is no 87-90 YJ listed. Is there a reason for this? I have a 4.2l in my 90 at the moment and have been thinking to put a 4.0l for the fuel injection out of my 94 cherokee if it was possible.
     
  15. Mac5005

    Mac5005 Welding Instructor

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    Bc the 87-90 yj is a 4.2 not the 4.0.

    Swap can be done, that’s what my yj is, but it’s not simple or easy. It’s the same as swapping any FI motor into anything else.

    Wiring, fuel system etc.

    The mounts are the same lol.
     
  16. rich060685

    rich060685 New Member

    Joined:
    Jan 27, 2018
    Location:
    Pennsylvania
    Yea I figured that much. My questions were whether or not the wiring harness itself for the fi engine would plug into the firewall as is or if i'd have to fabricate it to work with the jeep itself?

    If it gets to be too much work for my ability i'll just go with the carb upgrade and be done lol.
     
  17. moldman05

    moldman05 Well-Known Member

    Joined:
    Jan 27, 2006
    Location:
    Rocky Mount NC
    It’s not a plug in. I’ve done only one 4.0 into a 4.2. I took all of 4.2 stuff out of the harness and installed the 4.0 stuff. I was told not to connect the check engine light because it would probably stay lit forever. I used gas tank, fuel lines and pump from a donor. Not a terribly hard job. Harness was the hardest. Locked my self in my garage when nobody was home. Cut open both harnesses side by side on a sheet of plywood and grafted them together. I would recommend buying the harness if available. It was probably 14 or 15 years ago and I didn’t know where to even look for a harness that I could afford
     
  18. Mac5005

    Mac5005 Welding Instructor

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    Oct 19, 2005
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    Rocky Mount
    He did mine
     
  19. DAS_TJ_Project

    DAS_TJ_Project New Member

    Joined:
    Apr 8, 2018
    Location:
    Horseheads
    I am looking to put a 4.0 L 2002 WJ into my 2000 TJ. The bolt holes look good but the TJ transmission bell has a splined shaft and the WJ bell has what looks like maybe a torque converter. Do I need to purchase the transmission and transfer case from the WJ to put into my TJ? TJ vs WJ photos below
    MyNew2000TJ_Xmission.jpg 2002Cheokee_Xmission.JPG
     
  20. Shives1925

    Shives1925 New Member

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    Mar 20, 2019
    Location:
    Iowa
    Ok so I have a 95 Cherokee with a 4.0 and I’m looking at getting a 4.0 out of a 93 Cherokee sport would everything be plug and play or would I need to switch wire harnesses and other things? New to swapping Jeep motors and would like not to run into any problems and get it done as quick as possible. Thanks in advance!!
     
  21. skyhighZJ

    skyhighZJ Thanks for your taxes

    Joined:
    May 31, 2012
    Location:
    Aberdeen, NC.
    Yes the ‘93 will swap direct to the ‘95. The easiest way to do this is strip the ‘93 down to a long block. As you pull the ‘95, label EVERYRHING! Strip the ‘95 down to a long block. Bolt everything on to the ‘93 (belt line accessories, intake, exhaust, etc.) set the “new” motor in the hole. Plug everything in. Go.
     
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  22. Shives1925

    Shives1925 New Member

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    Ok thank you very much that will help me tremendously!! Greatly appreciated!!
     
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  23. Uniqueproco

    Uniqueproco New Member

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    Apr 26, 2019
    Location:
    Belding
    Okay so I totaled my 1997 Jeep Wrangler 4.0l and just recently bought a 2002 Jeep Wrangler 4.0l, my plan is to stroke out the 97 4.0l and swap it into my 2002. I know that the 02 motor has coil packs vs the 97 having a distributor..
    Can I swap them?
     
  24. skyhighZJ

    skyhighZJ Thanks for your taxes

    Joined:
    May 31, 2012
    Location:
    Aberdeen, NC.
    As I understand it, yes, and there are ways you can build a bracket to hold the coil pack using some simple fabbed brackets off the valve cover 747AA757-B922-40D2-9C13-A7B163634438.jpeg
    Or do away with the coil pack all together and do the viper coil pack mod.
     
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  25. Uniqueproco

    Uniqueproco New Member

    Joined:
    Apr 26, 2019
    Location:
    Belding
    Now would it be better to use the head off the 97 or the 2002? If it’s even possible?
     

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