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

skyhighZJ said:
Sucks as it may be but I would do everything in my power to get all the gas out of that thing. Throw some berrymans or sea foam in the tank and then top it off with the fanciest premium gas you got and drive it. Would also change fuel filter prior to all of this. YMMV.
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Jeeps fixed it was a loose bolt on the rocker that had it off center of the valve spring everything else checked out good I started it let it idle for 10min knocking is gone so far
Thanks everyone for your help I really do appreciate it
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That inspection camera I bought this morning was well worth the money saved time and unnecessary work taking things apart that didn't need to be good investment is recommend getting one if you don't have one
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We have a 2001 Jeep Grand Cherokee Limited, 4.0 six cylinder, if I buy a 2002 will that engine fit. The 2001 is shot. Thank you in advance B
 
not trying to beat a dead horse here, but i blew the head gasket in my 99 tj bought new cylinder head (Techhead all-11311) timing set, gaskets, the whole shebang, started tearing it down to find i cracked the block, so i found a 98 zj motor for a decent price and started putting all my new goodies on and found the timing set was different, got the right one and well now i'm on to the head, will my 99 tj head bolt on and work on the 98 zj block? i see the ports are bigger on the 99 which matches what i have manifold wise, so is that the only difference? TIA
 
DisbTom said:
not trying to beat a dead horse here, but i blew the head gasket in my 99 tj bought new cylinder head (Techhead all-11311) timing set, gaskets, the whole shebang, started tearing it down to find i cracked the block, so i found a 98 zj motor for a decent price and started putting all my new goodies on and found the timing set was different, got the right one and well now i'm on to the head, will my 99 tj head bolt on and work on the 98 zj block? i see the ports are bigger on the 99 which matches what i have manifold wise, so is that the only difference? TIA
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Yes.
It is 100% bolt-on with zero modifications.
 
KNCAUTOWORKS said:
HI THERE,
I have a client that wants to put a 1991-1995 Cherokee XJ (4.0 Liter High Output 6 Cylinder Engine) into a 1999 Jeep wrangler. Is it possible??
feedback: Kncautoworks@gmail.com
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Read the first page here, it'll answer your question:
nc4x4.com

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

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...
nc4x4.com nc4x4.com
 
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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Hey, I was just wondering if this list includes transmission compatibility as well? I have an 01 Cherokee and just want to know if I get any earlier year engines listed to fit 01 Cherokee, will they bolt right up to my transmission? I want to get one with the bigger ported head and non 0331.
 
Dustin541 said:
Hey, I was just wondering if this list includes transmission compatibility as well? I have an 01 Cherokee and just want to know if I get any earlier year engines listed to fit 01 Cherokee, will they bolt right up to my transmission? I want to get one with the bigger ported head and non 0331.
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Yes, they will bolt up.
 
Hello all, my d-i-l just bought a 94YJ with a 2.5 and an AX5. It came with a complete 4.0 auto trans and np231 from a 2001 TJ, engine harness and ecm included. How much issue is this gonna be getting this ecu to work in the YJ? I do not have the harness with the gray plug for the ecu.
 
Gone Crawlin' said:
Hello all, my d-i-l just bought a 94YJ with a 2.5 and an AX5. It came with a complete 4.0 auto trans and np231 from a 2001 TJ, engine harness and ecm included. How much issue is this gonna be getting this ecu to work in the YJ? I do not have the harness with the gray plug for the ecu.
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It's going to be a ton of work to wire in the 01 ECM and harness.
 
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!
Click to expand...
Does this mean I can put a '89 Cherokee 4.0 Renix in my 1997 TJ as long as I relocate the temp sensor to the thermostat housing?
 
JeppGirl97 said:
Does this mean I can put a '89 Cherokee 4.0 Renix in my 1997 TJ as long as I relocate the temp sensor to the thermostat housing?
Click to expand...
Yes, you can but you'll be giving up almost 20hp and 5-10 ft/lb of torque over using the correct HO motor.
 
Confirming that a 05.2002 TJ will NOT work in a 05.2001 XJ.

Thanks!

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.
 
Hey everyone,


I literally just joined the group. An I've never worked or drove a jeep until a week ago.

I bought a 1998 grand cherokee laredo 4.0l about a week ago an it definitely need some tlc (Engine,TC,Trans) are in excellent condition. But I've come to realize that there is a lot of rust underneath everywhere that the owner before me actually hid/covered up.. well my main reason for joining the group is to find out if I can take the engine from a 1998 JGCL 4.0l an drop it into a 2002 JGCL that had a 4.0l I picked the shell up for Practically nothing yesterday an the reson is the body is in awesome/ Pristine shape.

If it is possible what all can be swapped over.
 
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