Engine swaps
Thread Starter
Newbie
Joined: Jan 2018
Posts: 16
Likes: 0
Model: Cherokee(SJ)
Engine swaps
Sooooo, I posted last year about a cracked head on my Mom’s ‘01 Cherokee XJ. Since then, the worst fears are realized, and the bearings at the camshaft are gone 
Sooooo. There is an ‘02 she’s interested in, the current owner is replacing a blown motor. If he hasn’t acquired an engine yet, is it possible to use an ‘03 4.0 L6 from a Grand Cherokee, and if so, how difficult is such a swap? I’m asking because I know the ‘03 4.0 L6 should have the TUPY cast head, therefore less prone to cracking. TIA for any and all help 
Sooooo. There is an ‘02 she’s interested in, the current owner is replacing a blown motor. If he hasn’t acquired an engine yet, is it possible to use an ‘03 4.0 L6 from a Grand Cherokee, and if so, how difficult is such a swap? I’m asking because I know the ‘03 4.0 L6 should have the TUPY cast head, therefore less prone to cracking. TIA for any and all help 
CF Veteran
Joined: Dec 2015
Posts: 3,038
Likes: 338
From: PA
Year: 1997
Model: Cherokee
Engine: 4.0L
Found this.
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)
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)
Thread
Thread Starter
Forum
Replies
Last Post
seven
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
Jul 18, 2013 01:49 PM
Thegreenmachine
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
5
Aug 2, 2011 05:57 PM
SGNellett
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
Jan 16, 2008 11:28 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
