Jeep cherokee 0331 head crack

Its quite small still, but its the source of the only darkcolored slime in sight, right beneath the oil fill just like everyone on the jeep forums said it would be. Coolant in the oil from a cracked 0331 head will toast your engine bearings in pretty short order. I own a 2000 wj and just replaced the 0331 head in it at 170k because it started dripping coolant out the exhaust pipe when idling for long periods. Have never done a compression or leak down test though. Ive read that the heads labeled 0331 are prone to cracking and that they. If the jeep youre looking at has the 0331 casting beware. The head generally will not fail unless you overheat it. There are very few things jeep enthusiasts can agree upon. Confirmed cracked 0331 head on 01, how should i proceed. Im sure youre looking for some quick answers about this adapter plate, so lets get right to it. Whether it is the original head or not is anybodies guess. Jeep cherokee questions will a 2000 jeep cherokee sport. I am currently replacing the cylinder head on my 01 xj with a clearwater cylinder head.

Along with tims suggestion of a tupy cylinder head redesigned 0331, if you want to go new, contact clearwater cylinder head or alabama cylinder head and they can set you up with one of their redesigned new heads. Headliner fabric is falling down, im going to try and convince swmbo to go with a gray tartan plaid fabric to replace it. Overheat your 0331 head and its a bit more likely to crack. Xj cherokee technical forum a helpful hint to tell if your head is.

Yes make sure its not the 0330 or 0331 head its known to crack i had one cracked in 6 different places between cylinders. Oct 22, 2008 i think you can get a god deal on the reman cylinder head. Jeep cherokee cylinder head replacement hints and help well i bought me a 2000 cherokee a few weeks ago and it looks like i have the standard 0331 head crack. Replacing a pcm on a jeep tj codes p0031, p0037, p0051, p0057. I have known for a little while that i had a bad head do to a bad production batch of 0331 casted heads, i have a 2000 jeep grand cherokee laredo with a 4.

The tupy head was also a 0331 head that had been redesigned with a thicker deck. You can stress it and crack it more, blowout the head gasket and the next thing you know, it was running fine yesterday, but today its overheat and puffing white smoke like a steam train. I had a 2000 cherokee xj with the 0331 head and never had an issue with it at all. This is a direct bolt on cast iron cylinder head to replace your factory casting. Turned on the heater and temp immediately dropped to normal driving temp. You can replace the head yourself or have a mechanic swap em out. Mostly this is for wranglers as by this time they knew of the cracking issue with the 0331 head and the cherokee was being killed off in 2001. Just put your core head in the box that you received your newrebuilt head in and attach the prepaid peel and stick label. Some late 99s should have this head and all 20002001 cherokees should have this 0331 manufacturing defective head unless already replaced via repair. We sell new or remanufactured automotive cylinder heads for jeep. Apr 20, 2011 this article will present you with the four most common ways to test for a blown head gasket on a jeep 4. Cylinder heads that were cast around the year 2000 for various jeep models, including the xj cherokee, are prone to cracking. All three of these are are 0331 heads because of the design of the ports, and all three of them have 0331 cast into them in the same spot. You can also buy an aftermarket 0331 head from clearwater that has a thicker deck to prevent the cracks.

I can run it with the oil cap off and watch the coolant slowly bead out of the crack, so there is no doubt about it. If youve found your way here, then you probably already have a cracked 0331 head in your jeep or you are thinking about a preemptive replacement of your 0331 in favor of the more reliable 0630 or 7120 heads. Several warning signs combined with a thorough cylinder head inspection can nip the problem in the bud before major engine wear occurs. Xj cracked head check out a promaxxperformance replacement. Promaxx performance developeddesigned this cylinder head from the oe casting 331. Bought a head for my 2000 jeep cherokee xj, to replace the head cause the year is known for cracks in the head and this fit perfectly, it looks like it doesnt have the studs for the exhaust but they actually come off your old head and thread right on, everything went on perfect and it comes with valves already on so thats good, got to where i live in socal in. Typical issue of cracked 0331 head between cylinder 3 and 4 on a 2001 xj sport with 164k miles. Jeep cherokee questions will a 2000 jeep cherokee sport 4. Several warning signs combined with a thorough cylinder head inspection can nip the problem in. Cracked head 2000 jeep cherokee how much should it cost to have a cracked head and or a head gasket repaired on the 4. I bought the jeep about 3 years ago, and about a year ago coolant started leaking into the oil. Jeep cylinder heads remanufactured by clearwater cylinder. Just like the title states a massive crack somewhere inside the head or. They show up as either coolant in the oil or steam in the exhaust, or both.

How to identify 0331 or tupy head jeep wrangler tj forum. Theres an increase in pressure within the cooling system, and this causes coolant to blow out and get into your grand cherokees oil, causing it to turn milky. All four are very simple and easy tests that will help you confirm or disconfirm a blown head gasket. Purchase directly online from clearwater cylinder heads. As with many other xj owners, my cylinder head is cracked due to the defective 0331 head. Jeep cherokee head removal pics bob is the oil guy. Just been reading about the common problem of a cracked head on early tjs with the 4. On a scale of 1 to 10 i would rate head replacement on a 4. I have most recently replaced the cracked head with a brand new head from clearwater, but before the crack was discovered, the oil pump was replaced following the replacement of the oil sending unit. Doing it yourself isnt bad and you do not need to remove the. Apr 21, 2009 check to see if you can get an estimate in repairpals estimator for a head gasket replacement. Fwiw i visually identified the crack in my 01 xj head tonight. Awful lot of 20002001 wranglers with well over 150,000 miles with the 0331 head with no problems.

It came in the shop with a 8 inch crack in the cylinder head with a blown head gasket, but was running, so i recommended engine replacement. Make sure that your jeeps engine has everything it needs for efficient operation with the right jeep 4. I would have to say it probably not even close to 100% or even close to 50% of the 0331 heads that crack. I had a 2000 cherokee xj with the 0331 head and never had an. Cherokee and grand cherokee did jeep use the 0331 cylinder head. The early ones the first year or so had cracking issues. In 2002 they contracted with tupy manufacturing in brazil to remake the head.

Cylinder head gasket set hs9076pt4 compatible with jeep cherokee and. They feature better flowing intakeexhaust ports along with a modern combustion chamber design and back cut and s. I bought a 2000 jeep cherokee xj limited with the 4. Nov 17, 2009 i bought a 2000 jeep cherokee xj limited with the 4. Great forum for the jeep xj cherokee with many to answer your questions.

Replace with a quality head from promaxxperformance. I have decided to buy a used late model 0331 head and remove it from the donor vehicle myself, that way im certain that im getting what i want. I have 225k miles on my jeep and most parts are original, so i also decided to replace the water pump, thermostat housing and tstat, intake manifold, valve cover, push rods, rocker arms, 4hole injector upgrade, oxygen sensors, serpentine belt, and spark plugs. The cracking can just occur without overheating or with overheating. If the cylinder head is not already cracked, it will be. Engine is toast due to the wonderful 0331 head design and its notorious tendency to crack. Yes make sure its not the 0330 or 0331 head its known to crack i had. I have heard that some very late 1999 models had the 0331 head. They have helped countless of unfortunate jeepers with their cracked 0331 head. Moby 2001 jeep cherokee xj builds and project cars. The 2000 jeep cherokee has 15 nhtsa complaints for the engine and. I was wondering if the new 0331 heads have the same issue as the original ones that came on these engines.

I noticed the coolant has been low and have replaced some twice now in about a month long period. I think im going to try to source a newer 0331 head from the junkyard, as supposedly dc fixed the problem later on. Rockauto ships auto parts and body parts from over 300 manufacturers to customers doors worldwide, all at warehouse prices. Eventually i discovered a crack in the 0331 tuppy head between cylinders 3 and 4. Antifreeze seen in the oil looking through valve cover oil fill cap. I do know that it is a 0331 head cause i replaced the valve cover gasket when i upgraded to 4 hole injectors. Anyway im fairly car savy so i know what im doing for the most part. Too bad the head cracked a month later because of an overheat in a 0331 head. The difference in price between getting a head gasket and the entire cylinder head would just be the price of the cylinder head.

Its pretty easy, but if you are all thumbs you might want some help. Can someone tell me what years on the cherokee and grand cherokee did jeep use the 0331 cylinder head. Ive got all the parts i need im just waiting on my service manual cd to come in the mail. Im interested in swapping in a low mileage salvage motor from a 200204 grand cherokee or a 0206 wrangler. I talked with several mechanic friends and the head fleet mechanic at work told me the cracked head is extremely common. Im sure youre looking for some quick answers about this adapter plate, so lets get right to. Mine was at 117k miles, and the average mileage for failure seems to. He ended up ditching his grand cherokee and going to a 2.