I've lost count of the number of 0331 heads that have cracked in the last few . the manufacturers actually fixed the head cracking problem sometime in 2001. .

Jun 12, 2011 – 2001 cherokee 109k miles cracked head no oil pressure at hot idle. . 1999 Cherokee XJ - Blown head gasket?by xjTalk133 views · Thumbnail .

10+ items – With An 0331 Head Cracked, with an 0331 head cracked or .

9 posts - 2 authors - Last post: May 16Not sure it's a problem but thought I'd see if others have noticed the same issue. . to the infamous bad 0331 head casting. hairline crack in the head. . But it could be anything. head gasket, cracked head, pin hole leak in the .

10 posts - 8 authors - Last post: Aug 23If I remember right the 2000 and 2001 model years with head casting number 0331 had some issues with the heads cracking. I don't know the .

10 posts - 7 authors - Last post: Feb 13, 2007The biggest problem in diagnosing the problem is that the crack usually doesn't . I also have the 0331 head do you think it has a crack to? .

Aug 16, 2010 – If you have more information on this Jeep oil pressure problem please . . Search “0331 head crack” in the jeep forums and you will have all the .

Aug.5th 2008. I have a 2000 JGC V8 with all the same problems. . Took it apart and yes, head (0331) is cracked in the usual place. Cylinders look good. Hoping .

15 posts - 11 authors - Last post: Oct 23, 2009I never knew about the 0331 head casting problem before, and I think this .

3 answers - Jan 21, 2008The problem with the engine is one of the headers has a crack in it, so I was . The 96 era Jeep used the 0331 head and it's known to be crack .

I reply "Yes", and they inform me that I have a cracked cylinder head and the leaking . I see that the 4.0L engine with cylinder head #0331 is notorius for cracking. . The whole problem was tied to the engine reaching operating temperature. .

Mar 2, 2008 – Have a Jeep 2001 Grand Cherokee with a cracked head. Problems with that year head, want to know if we can use a different head. Want to swap out our head, cast # (0331) with an earlier year head, cast #(0630). Plan on .

2001 Jeep Wrangler problem with Engine And Engine Cooling. .

2000 Jeep Cherokee problem with Engine And Engine Cooling. . REPLACED CRACKED CYLINDER HEAD ON 2000 4.0L JEEP CHEROKEE, AT 97358 MILES. . 0331, I FEEL THAT CHRYSLER CORPORATION BEARS RESPONSIBILITY .

9 posts - 7 authors - Last post: Apr 24, 2010I agree that NAXJA overplays the 0331 head problem, but having had one fail and crack in the exact spot that it was "supposed" to, I've got to .

3 posts - 2 authors - Last post: Feb 20, 2009May have a cracked 0331 head. Has anyone else had this problem with 00-01 4.0L 0331 heads? I have been having a missing coolent issue .

15 posts - 11 authors - Last post: Mar 13, 2010So I'd like to jump on it before I start to have issues. My Jeep has . my 0331 head . IMHO the 0331 head fails from abuse by lack of maintenance . So I can't believe that the crack is purely due to overheating. I chose not to .

21 posts - 9 authors - Last post: Jun 16Odds are a cracked head. Pull a spark plug out, one at a time, . . What is a 0331 head casting and what problems arose? i have never run .

15 posts - 7 authors - Last post: Feb 3, 2009I had a 0331 head crack. I didn't realize it for awhile and I was unaware that these heads had problems. There were no signs of a leak other .

Oct 1, 2004 – The 1999-2005 cylinder head has casting number 0331, and includes the same two head dowel receiver holes. Surprise, surprise: the intake .

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. I would .

15 posts - 8 authors - Last post: Mar 14, 2009add me to the list - 2000 TJ 99K - Cracked 0331 head. Milkly coolant oil sludge mix under the valve cover between cylinder 3 and 4. Also was .

1 post - 1 author - Last post: Jul 12000 Cherokee Sport, 4.0 I am pretty sure that my head is cracked, and I'm pretty sure that it is the "infamous 0331". . My question is: Since it is known that it's a problem head. would it be good enough to replace it with a .

I was also told it is a known problem by jeep and it was due to defective . Closer inspection reviews a cracked head at 35k miles the jeep has cracked a head. . that daimler-chrysler used 0331 cast heads on this model cherokee (2000 w/ 4.0l .

May 1, 2009 – Cracked 0331 cylinder head castings - JeepsUnlimited.com Forums About a chronic problem with the 0331 cylinder head cracking. I don't know .

Crack repair has become one of today's hottest topics because good . . have had problems getting the powder to stick or fill properly, or that heads often recrack .

10+ items – Your 0331 Head Cracked, has your 0331 head cracked.

15 posts - 8 authors - Last post: Mar 20the 0630 head, 96-97-98-99? head is easy to retrofit. the coil packs have to be . . head was removed, i didnt even know theyre was a problem until i was . tells you it has a mystery coolant leak it probably has a cracked head. .

9 posts - 3 authors - Last post: Nov 10, 2009If i need to replace the heads do i need the head that i put on, to be .

NEW JEEP CHEROKEE LAREDO 4.0 0331 CYLINDER HEAD in eBay Motors , Parts Accessories , Car Truck Parts , Engines Components , Cylinder Heads .

Aug 13, 2010 – My girlfriend's son just bought one, but didn't know its .

15 posts - 8 authors - Last post: Apr 5, 2010I do know some model 4.0L have head gasket issues - hopefully the .

39 posts - 12 authors - Last post: Dec 11, 2007No Problem, so i go to sears and get a 1/2" 12 pt deep. works great until .

15 posts - 10 authors - Last post: Dec 10, 2010. of threads about the dreaded 0331 cracked cylinder head problem, . To find out the actual percent of 0331 heads that cracked, everyone .

7 posts - 4 authors - Last post: Mar 30, 2007As you may know, the 2000+ model years of the 4.0L are crack prone . another 0331 casting, as I don't want the incompatibility issues involved with . I have decided to buy a used late model 0331 head and remove it from .

32 posts - 12 authors - Last post: Aug 3if i remember right the last xj with cooling issues was a head gasket . The heads on those (casting #0331) like to crack between cyls 3 & 4. .

Aug 24, 2011 – Of course my Jeep has the crappy 0331 cylinder head and it finally . 2000-2002 with cylinder head casting # 0331, they will probably crack, and its usually . they fixed this problem in 2002 or 2003, obviously it wasn't in 2002! .

If you answered yes to any of these, you may have a cracked head. . Otherwise you will think your problems are worse than when you started. Again: I strongly .

Jun 12, 2011 – 2001 cherokee 109k miles cracked head no oil pressure at .

15 posts - 5 authors - Last post: Jan 18, 2010I ended up driving once I cracked the head - put about 3k miles or so . 0331 Head on my Jeep. Have no problems with it and all fit well. .

8 posts - 7 authors - Last post: Feb 14, 2007Car Forums Cracked Cylinder Head Grand Cherokee | Grand . Has anyone ever had this problem? . Cyl. head casting # 0331 is bad. .

10+ items – 0331 Head Cracked, your 0331 head cracked 0331 head cracked .

I have a 2001 Wrangler Sport 4.0L. I have a blown head gasket last week, My .

8 posts - 4 authors - Last post: Nov 29, 2004Engine Head Cracked - Rebuilt or New Engine? . jeep) and was surprised to hear the dealer tell me that this is not an unusual problem with this engine! . xj31 is right about that particular head, the one with the 0331 casting. .

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 . A 2001 will just be adding the possibility of the same problem on a more .

9 posts - 7 authors - Last post: Feb 3, 2009I wouldn't worry about that head until you start seeing problems. . and it starts to scare people into thinking that EVERY 0331 head will crack. .

20 posts - 10 authors - Last post: Apr 8, 2006Cracked 0331 cylinder head castings Cherokee/Comanche Forum. . Please also give details about how the problem was discovered, the .

15 posts - 10 authors - Last post: Feb 100331 head change results OEM Tech Discussion. . Well the 98 has head issues , either bad head gasket or cracked head, low compression in .

Feb 10, 2010 – . have a 2000 tj with a cracked head, ordered a head off .

Gotta replace the notorious 0331 head and I've got to do it before I go to Moab. . and now I'm slowly loosing coolant (indicator of cracked head). . polls over on NAXJA and other boards, trying to see how many have had the problem. .

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