I have a 2001 Jeep Cherokee Sport Utility 4D with a 4L 6-cylinder engine. My engine is bad and needs to be rebuilt, but I'm thinking to just buy a new engine. I've found an engine + transmission combo set, 78k miles on it, from a 2002 Jeep Grand Cherokee Laredo. (the seller says its just a Jeep Cherokee but I'm fairly certain it's a Grand Cherokee) It's also a 4L 6-cylinder.

I'm wondering if the compatibility is right, that I could put this 2002 engine in my 01 Jeep Cherokee. What problems might I have to deal with, what should I prepare for and make sure of? Is it worth it, would it fit? It's the best match I've been able to find so far. Used of course, can't quite afford a crate engine at this point. Any help would be appreciated, thanks so much.

 

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 the 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)

 

So what significant modifications would I have to deal with with the 2002 ZJ to 2001 XJ engine swap?

 

Give this link a read
https://www.cherokeeforum.com/f58/06...-00-xj-229544/