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Old January 19th, 2012, 06:35 PM   #1
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Default Late 4.0 cylinder head - FOUND

0331 casting, crack free . Just seeing if anything is out there, let me know what you have.

Thanks.

Last edited by 1988JeepXj; February 7th, 2012 at 04:02 PM.
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Old January 20th, 2012, 03:08 PM   #2
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bump
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Old January 21st, 2012, 12:50 PM   #3
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Bump.

I'd be interested in a whole engine for an XJ with a 0331 head if somebody has one.
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Old January 21st, 2012, 01:28 PM   #4
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I thought that maybe I did, but it turns out it is an 0630 casting#
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Old January 22nd, 2012, 02:30 PM   #5
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bump
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Old January 23rd, 2012, 04:51 AM   #6
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ttt
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Old January 24th, 2012, 03:15 PM   #7
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bump.
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Old January 25th, 2012, 10:18 AM   #8
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Bump. Trying to find one by this weekend. Not looking too good.
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Old January 25th, 2012, 10:21 AM   #9
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i have a complete 4.0 that is locked up, what year range are you looking for
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Old January 25th, 2012, 12:06 PM   #10
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The head could be '99-'06.
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Old January 25th, 2012, 12:07 PM   #11
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But has to be that casting number?
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Old January 25th, 2012, 12:14 PM   #12
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this motor is a 2000.
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Old January 25th, 2012, 12:40 PM   #13
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got to get to my shop and check it out will let you know.
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Old January 25th, 2012, 12:59 PM   #14
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0630 sorry
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Old January 25th, 2012, 08:16 PM   #15
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Quote:
Originally Posted by Ridin Dirty View Post
But has to be that casting number?
Some '99 4.0s might have used the 0630 head, but all 4.0's from 2000 to 2006 used the 0331 head.

I may end up using an older 0630 head if somebody has one in good shape, but I would have to engineer a way to fasten my coil rail and do some serious exhaust modifications which I was trying to avoid.

A 2002-2006 0331 head would be ideal since they're less prone to cracking (revised casting, supposedly) but I'm not going to be picky as long as its not cracked already.
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Old January 26th, 2012, 09:10 AM   #16
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Ive got a 0630 head with around 25k miles on it. Let me know if you'd be interested
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Old January 30th, 2012, 10:19 AM   #17
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Bump. Now looking for an 0630 head, decided to just make the modifications needed.
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Old January 30th, 2012, 11:20 AM   #18
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I would buy a 630 head and exaust manifold or buy an aftermarket head before I put another crack prone 331 on it.Doing thinks twice sucks,ask me how I know.
good luck.
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Old February 5th, 2012, 04:05 PM   #19
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Bump ಠ_ಠ
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Old February 6th, 2012, 06:21 PM   #20
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Pm sent
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