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Devil_Mutt
August 4th, 2006, 18:48
I had a guy give me a 4.0 longblock, but he was not sure what year XJ it came from. Can someone take a look at these pics and see what you think?

http://i11.photobucket.com/albums/a158/rksp8/motor5.jpg
http://i11.photobucket.com/albums/a158/rksp8/motor6.jpg
http://i11.photobucket.com/albums/a158/rksp8/motor3.jpg
http://i11.photobucket.com/albums/a158/rksp8/motor2.jpg
http://i11.photobucket.com/albums/a158/rksp8/motor1.jpg
xjtrailrider
August 4th, 2006, 20:22
Definitly not a RENIX(87-90) unless the exhaust man./valve cover was changed. I'm "guessing" late OBDI or early OBDII(94-96).
bajacalal
August 4th, 2006, 22:14
Its hard to say. From what it looks like, the motor has a later cast valve cover. A dealer parts guy told me they switched to the stamped cover in 1996. I also thought the main bearing girdle (isin't that one?) on the crank shot was included in 1996.

On my motor, I found what appears to be a casting date on the side of the block. Underneath where the exhaust manifold is a string of lettes and numbers. From what I remember it begins with "4.0L NVH" and ends with appx. "10 16 95." That date would make sense as occurs roughly 1 month before my documented vehicle build date.
lilredwagn
August 4th, 2006, 23:41
'95 or earlier. Doesn't have the main girdle that was added in '96.
Devil_Mutt
August 5th, 2006, 07:53
Im wondering if I could rebuild it, and use the intake and head from my 90? Any thoughts or suggestions?
johnnyc
August 5th, 2006, 08:44
'95 or earlier. Doesn't have the main girdle that was added in '96.

It's been a while since I changed my rear main seal...but isn't that the girdle in the last photo? I remember having to undo a whole lot of bolts (14) to get to the rear main cap.
Yucca-Man
August 5th, 2006, 11:50
That's definitely the 96+ main girdle in the last photo. If that's the case, you've got a block with added bracing to reduce NVH (noise, vibrations, harmonics)
Devil_Mutt
August 5th, 2006, 12:41
found the build date on the block... 6/27/97. How much would be involved to drop this in my 90?
Devil_Mutt
August 6th, 2006, 16:01
How do the accessories differnt on the front of a 97 compared to a 90?
xjtrailrider
August 7th, 2006, 16:54
I know the power steering pump bracket is different. and the idler pulley is in different locations from 90 to 97.