PalmCoastXJ

Well I hydro locked my 91 and am looking to get a new motor. I know I atleast want a 91 or newer because of the H.O. but am wondering if there is much difference if i went to a newer obd1 verson. i know i could swap my intake on so everything would match but if the bottom end would be the same. Just looking for a motor and dont want to get one that doesnt work. Also would one out of a grand cherokee or wrangler work?

Radi

I think the only change to the block was in '96 when they strengthened it a bit. As far as I know they are all interchangeable.

PalmCoastXJ

Thanks because I can get 96 for cheap.

McCalley08

Some say a 98 is the best one they built. In 99 1/2 they came out with the newer heads that are prone to cracking in the middle between cylinders 3 and 4.

PalmCoastXJ

Going to pick up a running 96 to swap in there tomorrow.

cruiser54

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. (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.

xjboy14

just try and get a newer one with as few miles as possible,
i rebuilt my 01 TJ engine with 05, or 04 engine? it only had 17,000 on the engine
rebuilt 2 years ago and it is running strong, just drove 100 mile trip 2 ways =200miles
no problems

PalmCoastXJ

Just picked up a full running and driving parts xj. It's a 97 compression is good and seems healthy. Best part about it got it for only 400 bux.

cruiser54

SCORE! I did something similar. It's like having your own personal junkyard. Swap the cooling fan into yours. Only need to change the plug.

xjboy14

Whats wrong with the 97? id keep that

PalmCoastXJ

2 door 2wd beat up a bit body and dash wise and supposedly something wrong with the trans but I couldn't get it to act up at all. I'll post up pics later.