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?
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Originally Posted by PA_XJ
(Post 3543010)
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?
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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.
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Originally Posted by cruiser54
(Post 3543050)
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.
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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) |
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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