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post #1 of 5 Old 12-01-2012, 05:05 PM Thread Starter
gunsmoke54
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Engines

I just bought a 2001 Jeep cherokee 4.0 with a bad engine. I found a engine out of a 1998 with super low miles, i was hoping somebody would be able to tell me if it would fit in my 2001 cherokee. Thanks for any help.

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post #2 of 5 Old 12-01-2012, 07:32 PM
Jeepinfreak
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All 4.0l are basically the same. However, I haven't worked with the 99 and newer 1s yet to know for sure. I know there will be alot of differences with the sensors and such. The block and head are different casting numbers, but that doesn't always disqualify it. I've heard that alot of guys like using the older heads on the newer motors for increased airflow.
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post #3 of 5 Old 12-01-2012, 07:47 PM
jrallen
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Quote:
Originally Posted by gunsmoke54 View Post
I just bought a 2001 Jeep cherokee 4.0 with a bad engine. I found a engine out of a 1998 with super low miles, i was hoping somebody would be able to tell me if it would fit in my 2001 cherokee. Thanks for any help.
I've put a 4.0 out of a '00 GC into a '97 TJ if that tells you anything
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post #4 of 5 Old 12-01-2012, 07:59 PM
dmill89
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Quote:
Originally Posted by gunsmoke54 View Post
I just bought a 2001 Jeep cherokee 4.0 with a bad engine. I found a engine out of a 1998 with super low miles, i was hoping somebody would be able to tell me if it would fit in my 2001 cherokee. Thanks for any help.
Yes, but it won't be a drop in. The 2001 has coil on plug ignition and a 2 piece exhaust manifold. You would have to fab something up for the coil mounts and get a different exhaust manifold, there would also likely some wiring and sensor differences but you can swap in the "old" wiring and/or sensors from your 01 engine. You could also use the 98 block with a head from a 02+ TJ (Wrangler) or WJ (Grand Cherokee) with a 4.0L I6. Do not use a 2000-2001 4.0L head these would be a perfect match (02+ heads are also a match) but these heads (0331) have a casting flay that can cause them to crack if overheated which is likely what killed the engine in the first place. This flaw was corrected in 2002. You could also get one of the aftermarket heads from a manufacture such as Clear Water heads, these are superior to the stock head but cost more than junk yard head.
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post #5 of 5 Old 12-03-2012, 07:39 AM Thread Starter
gunsmoke54
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Thanks for the replies guys.
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