4.0 engine ZJ to WJ, will it work - JeepForum.com

 
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post #1 of 2 Old 10-14-2013, 07:46 PM Thread Starter
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4.0 engine ZJ to WJ, will it work

Trying to find out if a '97 ZJ 4.0 will fit into a '04 WJ ? What will need to be changed other than the coil pak rail and dist. or will it Not work at all ? Thanks.

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post #2 of 2 Old 10-15-2013, 06:03 AM
cruiser54
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XJ Cherokee and ZJ Grand Cherokee 4.0L engine blocks interchange.

2000+ TJ Wrangler and WJ Grand Cherokee 4.0L engine blocks interchange.

XJ/ZJ blocks and 2000+ TJ/WJ blocks do not interchange without significant modifications. (1991 to 1995 YJ and 1997-1999 4.0L TJ Wrangler blocks will interchange in XJ/ZJ and visa-versa).

TJ/WJ 4.0L Engine blocks underwent clean sheet design changes effective in the 1999 WJ Grand and 2000 TJ Wrangler. These blocks are not interchangeable with XJ/ZJ engine blocks. The reason is motor mount bolt holes and belt driven accessory mounting bolt holes are in different locations, or not present at all, TJ/WJ vs. XJ/ZJ.


XJ: "Regular" (not Grand) Cherokees 84-01
ZJ: Grand Cherokee 93-98 (Gen1)
WJ: Grand Cherokee 99-04 (Gen2)
YJ: Wrangler 87-95 (Gen1)
TJ: Wrangler 97-06 (Gen2)

If you own a Renix Jeep, you'll want to check this out.

An index to over 30 write-ups can be found in the link below

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