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

My dad needs a new motor because of a cracked block. He had the head complete rebuild because this was the original problem but we doesn’t want all the money he put into the head to go to waste. What blocks will fit this head. 2000 XJ 4.0. Please let me know if you need any more information.
 
dylxnhd said:
My dad needs a new motor because of a cracked block. He had the head complete rebuild because this was the original problem but we doesn’t want all the money he put into the head to go to waste. What blocks will fit this head. 2000 XJ 4.0. Please let me know if you need any more information.
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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.
 
Found a ‘95 4.0 that I’m waiting to hear back more info on. Not sure what it’s originally out of, but someone stuck a T176 behind it.

I’m looking to put a 4.0 in my ‘87 YJ with the 258/a999 in it. Question: will I need to source a flex plate for. 4.0, or will my 258 flex plate work? And starter for that matter.
 
mbalbritton said:
Found a ‘95 4.0 that I’m waiting to hear back more info on. Not sure what it’s originally out of, but someone stuck a T176 behind it.

I’m looking to put a 4.0 in my ‘87 YJ with the 258/a999 in it. Question: will I need to source a flex plate for. 4.0, or will my 258 flex plate work? And starter for that matter.
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258 flex plate will.work. They're both balanced the same way. Same bolt pattern too
 
I'm hoping this thread is still open and/ or read. I want to swap a 97 Wrangler 4.0 motor into a 98 Cherokee 4.0 car. I'm wanting to know how easy and what differences, including harness and computer. Anybody out there?
 
Blaze said:
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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I'm a new member. I just posted a question. I've read your List for which I thank you and appreciate your research. I'm hoping for more specifics regarding a 97 Wrangler 4.0 into a 98 Cherokee which has a damaged 4.0. Any accessory or computer issues or anything else complicating a bolt-in "plug-and-play"?
 
edsCherokee said:
I'm a new member. I just posted a question. I've read your List for which I thank you and appreciate your research. I'm hoping for more specifics regarding a 97 Wrangler 4.0 into a 98 Cherokee which has a damaged 4.0. Any accessory or computer issues or anything else complicating a bolt-in "plug-and-play"?
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Swap all the accessories, including motor mounts, intake, etc, from one to the other.
The long blocks are identical.
 
adamjee said:
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?
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You can, but you'll need to fab a bracket to mount the coil pack. But, if you are rebuilding the engine anyway you might want to look into doing a 4.0L TUPY head. Much stronger and has the bosses for the coil pack mounts.
 
Blaze said:
You can, but you'll need to fab a bracket to mount the coil pack. But, if you are rebuilding the engine anyway you might want to look into doing a 4.0L TUPY head. Much stronger and has the bosses for the coil pack mounts.
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Isn't there a different coil pack that can be swapped in? I remember reading about the coil rail having issues and people swapping in a different coil pack.
 
ghost said:
Isn't there a different coil pack that can be swapped in? I remember reading about the coil rail having issues and people swapping in a different coil pack.
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I'll be honest, I'm not sure. It's been like 6 years since I closed the shop and at that point the solution was a bracket.
 
adamjee said:
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?
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It is nowhere near a direct swap. The accessory drive mounting points and motor mount bosses are totally different. You'll want an up to 99 model TJ engine to replace it with.
 
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