7 posts - 6 authors - Last post: Jun 30Here is what I am concerned about. I am going to see and possibly buy a XJ tomorrow. I have purposefully sought out a '99 rather than a '00 .

5 posts - 4 authors - Last post: Jan 11That's a known problem with many of the 0331 head castings that were introduced in the '00 model 4.0L engines. .

The 2000 (and some 2001) castings were flawed from the time they left the factory. I've lost count of the number of 0331 heads that have cracked in the last .

Our Chrysler Cast Iron rebuilt cylinder heads are best quality cast iron with . 4.0L Cherokee L6 1998-2004 (only come with a new casting) HCC 4.0-0331 .

8 posts - 7 authors - Last post: Feb 14, 2007I work at a engine rebuilding plant and one of my jobs is to inspect cylinder heads as they come in. Your particular head casting # 0331 .

Apr 3, 2011 – So if anyone with a Jeep doesn't know, the 4.0L from about 2000-2002 with cylinder head casting # 0331, they will probably crack, .

13 posts - 7 authors - Last post: Dec 19, 2010Again, you do NOT want a head with the 0331 casting number on it UNLESS it .

9 posts - 7 authors - Last post: Apr 24, 2010Keep in mind that the the 4.0L that came in the WJ from '99 to '01 were equipped with the oh-so-famous 0331 head casting that is known for .

2000-01 XJ Cherokee; 4.0L 242 engine VIN S block; Block casting: 53010449AA; Head casting: 0331; Crank castings: 53010411 and 53020767 .

1 post - 1 author - Last post: Mar 2, 2010Long block without 0331 Head. Jeep - Non Hardcore. . I found plenty with .

3 posts - 2 authors - Last post: Mar 10Mid 99 to 2002 4.0 engines had issues with the #0331 head casting cracking between the number 3 and 4 combution chambers, but most of them .

Jan 13, 2010 – What casting number(s) should I see, or do I need the exact .

10 posts - 3 authors - Last post: Feb 4Doesn't seem like that much of a premium over the rebuilt head. I recall the new head is the 0331 casting, revised to avoid its cracking .

0331 Head Casting Model: 203915 Shipping Weight: 350lbs Manufactured by: Jeep. $1672. SALE. flitelineenginesupply · Chry, 165 CID, 2.7L V6 -. Preview .

6 posts - 6 authors - Last post: Mar 4, 2010I know the 00's and 01's have problems with the 0331 head castings cracking. How many TJ's on here were affected by that? .

25 posts - 17 authors - Last post: Mar 7"The head casting number is stamped on the driver's side at the top somewhere opposite cylinder 3. The 0331 head appeared on '00-'06 models .

Mar 15, 2011 – It has higher miles and was told it needs a head gasket. .

13 posts - 9 authors - Last post: Jan 7, 2007I'm thinking about doing the 4.0 head swap on my CJ. Is there a preference .

Mar 23, 2010 – is #0630 head interchangeable with #0331. i have a '99. will it fit dead on? . Default head casting question .

9 posts - 7 authors - Last post: Jul 23, 2010Yes, avoid the '99 to 01 Cherokees with the 0331 head. . check the head casting # above the intake manifold (drivers side) cast right into .

7 posts - 5 authors - Last post: Jul 28, 2006Here's a good 0331 head casting discussion on jeepsunlimted.com. Scroll down to find a picture of the mod to an earlier head that allows you .

May 2, 2009 – I'm not 100% sure that I have the 0331 cylinder head. I went .

Products 1 - 10 of 10 – Jeep 4.0L, 243, Remanufactured Cylinder Head. 2000 .

7 posts - 6 authors - Last post: Oct 15, 2006head gasket, and mentioned that "sometimes these have a cracked head . . I would suspect the head is cracked, not the gasket blown, the 0331 head . (an ealier casting that flows just as well but doesn't have the .

AMC-242H-2, AMC/JEEP, 242, 4, 96-98, 0630 CAST HEAD, $245.00, $200.00. CLICK ON IMAGE TO EXPAND ? AMC-242H-3, AMC/JEEP, 242, 4, 99-04, 0331 CAST HEAD .

7 posts - 5 authors - Last post: Jul 22, 20102000-2001 had the factory 0331 head. That is the head with the casting defect between cylinders 3-4. There were some rumors that some very, .

7 posts - 3 authors - Last post: Jun 130331 Head replacement Tech Section. . Kinda sux, I have done a lot of head swaps on different vehicles but this was the only casting they .

May 1, 2011 – 'Drinks' coolant due to the infamous bad 0331 head casting. hairline crack in the head. Doesn't have white smoke, no 'milkshake' in the .

15 posts - 8 authors - Last post: Mar 14, 2009That might be the most informative 0331 pictures anyone could contribute, reportedly the Alabma 0331 head is a revised casting that doesn't .

New products 21 - 30 of 254 – Jeep 4.0L, 243, Remanufactured Cylinder Head. 2000-06, Casting Number 0331, AMC/ Jeep, Cherokee, Wrangler. NO CORE CHARGE! .

Right. Universal. Left. Perfect . 4X4 4.0L/242 L6 (AMC eng.) 2004-99; Vin S; Head Casting: 0331; Jeep . Download. Filesize: 3.72 MB | Ebook format : . .

May 5, 2011 – Designed after the #0331 casting number heads, this head is sized for 1.91-inch intake and 1.50-inch exhaust valves. .

15 posts - 8 authors - Last post: Apr 5, 201078000 seems really early for a head gasket on a 4.0L, especially on one that doesn't have the 0331 head casting. Comments? Suggestions? .

Jeep Stroker 4.0 NEW Cylinder head casting 0331 99 up in eBay Motors , Parts Accessories , Car Truck Parts |eBay.

8 posts - 4 authors - Last post: Nov 29, 2004xj31 is right about that particular head, the one with the 0331 casting. I .

2 posts - 2 authors - Last post: Jan 24WTB: 0331 Head. . No problems with it, been on 1 year now. Suppose to have improved casting over stock design. .

The '00 and later HO heads with casting no.0331 have smaller exhaust ports to produce a faster warm-up of the catalytic converter and improve emissions, .

Mar 12, 2011 – My newest is a 2002 Wrangler S. forgot to research the problem with the 0331 head casting, and it's popped it's ugly head (ha,ha) up. .

10 posts - 8 authors - Last post: Feb 14With a good light, you can read the casting number of the head. If you have .

12 posts - 7 authors - Last post: Aug 27, 2010Newer 0331 head from 06 Wrangler SoCal For Sale. . I have that cylinder head casting in stock. I just have to rebuild it. PM sent. .

Sep 19, 2009 – The 0331 heads (1999-2001) tended to crack atop the casting .

9 posts - 8 authors - Last post: Jul 2, 2010The '99 and later HO heads with casting no.0331 have smaller exhaust ports to produce a faster warm-up of the catalytic converter and .

2000-06 TJ Wrangler; 1999-04 Grand Cherokee; 4.0L 242 engine VIN S block .

15 posts - 2 authors - Last post: Apr 20, 2010Out of the three 4.0L heads I have now there are two castings. . . it,) or from the driver's side by seeing the head casting number (#0331. .

The '99 and later WJ heads with casting no. 0331 have smaller exhaust ports to produce a faster warm-up of the catalytic converter and improve emissions, .

39 posts - 28 authors - Last post: Nov 21, 2010That was the first year for the 0331 head which had casting problems which makes them almost always crack and have to be replaced. .

21 posts - 9 authors - Last post: Jun 16Isn't that the year of the infamous 0331 head casting? . What is a 0331 head casting and what problems arose? i have never run across this .

100+ posts - 16 authors - Last post: Jan 29no need to bet that will be a 0331 head, but even worse 99-01 were THE WORSE YEARS, . a little something called a 331 head casting number. .

7 posts - 4 authors - Last post: Mar 30, 2007I'm considering sourcing a new, factory replacement head (yes - another 0331 .

Apr 29, 2011 – Designed after the #0331 casting number heads, the 4.0L Jeep head is sized for 1.91˝ intake and 1.50˝ exhaust valves. .

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