New Engine
Thread Starter
Newbie
Joined: Aug 2011
Posts: 7
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From: Pennsylvania
Year: 2000
Model: Cherokee
Engine: 4.0L
New Engine
I currently need a short block for my 2000 XJ 4.0l. I've been told it's tough to find a short block for these and the best route is a full build/long block. Any suggestions on where to buy from and what to buy? Any mods worth doing to the new engine before dropping it in?
Senior Member
Joined: May 2017
Posts: 645
Likes: 34
Model: Cherokee
finding short blocks isn’t an issue from what I’ve seen ...... however ... I’d reccoemend a good used engine over a rebuild every day of the week ..I think you’ll get more people suggesting the same as well . Car-part.com will let you check local salvage yard prices ... they will negotiate FYI ... and Craigslist always seems to have someone selling a good running rusty XJ in my area . Good luck !
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I'm pretty sure the reason is that the heads are prone to cracking. Therefore a long block with the updated head would be a good choice unless your engine already has the updated head.
Thread Starter
Newbie
Joined: Aug 2011
Posts: 7
Likes: 0
From: Pennsylvania
Year: 2000
Model: Cherokee
Engine: 4.0L
yes it has a new head since we thought that was the issue which it was it was cracked but turned out a valve hung and smoked the cam
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
OK then:
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)
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)
Newbie
Joined: Jan 2019
Posts: 11
Likes: 0
From: PDX Metro Area
Year: 2000
Model: Cherokee (XJ)
Napa makes the 4.0 with the TUPY head (obviously long block).....Its not a complicated build and you're not racing it. Just make sure it's with the TUPY if you order it.........ironclad 3 yr warranty
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