Engine from 2000xj to a 1989xj

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04-10-2014, 07:18 PM

PNWxjJeeper

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Model: Cherokee

Engine from 2000xj to a 1989xj

I am looking at a 2000 xj sport with the same 4.0 6cyl as my 89. I was going to rebuild the engine from the 2000 and drop it into my 89. Is there anything that is different in the 2000 engine that I need to know about? Like electrical or anything I should know before hand?

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04-21-2014, 07:49 AM

cruiser54

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Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

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)

That info given, are you aware of the head cracking issues on 2000s?