Jeep cherokee 0331 head crack

Some late 99s should have this head and all 20002001 cherokees should have this 0331 manufacturing defective head unless already replaced via repair. Promaxx performance developeddesigned this cylinder head from the oe casting 331. I bought a 2000 jeep cherokee xj limited with the 4. I have heard that some very late 1999 models had the 0331 head. 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. Cylinder heads that were cast around the year 2000 for various jeep models, including the xj cherokee, are prone to cracking. Ive got all the parts i need im just waiting on my service manual cd to come in the mail. 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. Apr 21, 2009 check to see if you can get an estimate in repairpals estimator for a head gasket replacement.

Confirmed cracked 0331 head on 01, how should i proceed. All four are very simple and easy tests that will help you confirm or disconfirm a blown head gasket. As with many other xj owners, my cylinder head is cracked due to the defective 0331 head. 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. 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. Jeep cherokee questions will a 2000 jeep cherokee sport.

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. The difference in price between getting a head gasket and the entire cylinder head would just be the price of the cylinder head. On a scale of 1 to 10 i would rate head replacement on a 4. If the cylinder head is not already cracked, it will be. Oct 22, 2008 i think you can get a god deal on the reman cylinder head. How to identify 0331 or tupy head jeep wrangler tj forum. Yes make sure its not the 0330 or 0331 head its known to crack i had. Coolant in the oil from a cracked 0331 head will toast your engine bearings in pretty short order.

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. Just put your core head in the box that you received your newrebuilt head in and attach the prepaid peel and stick label. I would have to say it probably not even close to 100% or even close to 50% of the 0331 heads that crack. Great forum for the jeep xj cherokee with many to answer your questions. Just like the title states a massive crack somewhere inside the head or. Yes make sure its not the 0330 or 0331 head its known to crack i had one cracked in 6 different places between cylinders. In 2002 they contracted with tupy manufacturing in brazil to remake the head. 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. 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. Xj cherokee technical forum a helpful hint to tell if your head is. Jeep cylinder heads remanufactured by clearwater cylinder. 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. Make sure that your jeeps engine has everything it needs for efficient operation with the right jeep 4. I think im going to try to source a newer 0331 head from the junkyard, as supposedly dc fixed the problem later on. Typical issue of cracked 0331 head between cylinder 3 and 4 on a 2001 xj sport with 164k miles. I am currently replacing the cylinder head on my 01 xj with a clearwater cylinder head. 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. I talked with several mechanic friends and the head fleet mechanic at work told me the cracked head is extremely common.

Cracked head 2000 jeep cherokee how much should it cost to have a cracked head and or a head gasket repaired on the 4. They feature better flowing intakeexhaust ports along with a modern combustion chamber design and back cut and s. Jeep cherokee questions will a 2000 jeep cherokee sport 4. He ended up ditching his grand cherokee and going to a 2.

We sell new or remanufactured automotive cylinder heads for jeep. There are very few things jeep enthusiasts can agree upon. Several warning signs combined with a thorough cylinder head inspection can nip the problem in the bud before major engine wear occurs. Cherokee and grand cherokee did jeep use the 0331 cylinder head. Im sure youre looking for some quick answers about this adapter plate, so lets get right to it. If the jeep youre looking at has the 0331 casting beware. Anyway im fairly car savy so i know what im doing for the most part.

Im sure youre looking for some quick answers about this adapter plate, so lets get right to. 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. 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. The head generally will not fail unless you overheat 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. Replacing a pcm on a jeep tj codes p0031, p0037, p0051, p0057. Antifreeze seen in the oil looking through valve cover oil fill cap. Fwiw i visually identified the crack in my 01 xj head tonight. The early ones the first year or so had cracking issues.

I noticed the coolant has been low and have replaced some twice now in about a month long period. Several warning signs combined with a thorough cylinder head inspection can nip the problem in. Ive read that the heads labeled 0331 are prone to cracking and that they. Rockauto ships auto parts and body parts from over 300 manufacturers to customers doors worldwide, all at warehouse prices. Replace with a quality head from promaxxperformance.

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. Awful lot of 20002001 wranglers with well over 150,000 miles with the 0331 head with no problems. I had a 2000 cherokee xj with the 0331 head and never had an issue with it at all. 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. 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. Jeep cherokee head removal pics bob is the oil guy. Multiple issues develop when your engine cylinder head for jeep grand cherokee has broken down. Whether it is the original head or not is anybodies guess.

The tupy head was also a 0331 head that had been redesigned with a thicker deck. They have helped countless of unfortunate jeepers with their cracked 0331 head. Headliner fabric is falling down, im going to try and convince swmbo to go with a gray tartan plaid fabric to replace it. 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. I bought the jeep about 3 years ago, and about a year ago coolant started leaking into the oil. I had a 2000 cherokee xj with the 0331 head and never had an. Mine was at 117k miles, and the average mileage for failure seems to. Have never done a compression or leak down test though. I do know that it is a 0331 head cause i replaced the valve cover gasket when i upgraded to 4 hole injectors. Doing it yourself isnt bad and you do not need to remove the. Engine is toast due to the wonderful 0331 head design and its notorious tendency to crack. Purchase directly online from clearwater cylinder heads. You can also buy an aftermarket 0331 head from clearwater that has a thicker deck to prevent the cracks.

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. Feel free to post jeep part write ups or cherokee tech questions. Overheat your 0331 head and its a bit more likely to crack. Just been reading about the common problem of a cracked head on early tjs with the 4. You can replace the head yourself or have a mechanic swap em out. The cracking can just occur without overheating or with overheating. Im worried that i may have one of the weak heads in my jeep.

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. Cylinder head gasket set hs9076pt4 compatible with jeep cherokee and. I was wondering if the new 0331 heads have the same issue as the original ones that came on these engines. Moby 2001 jeep cherokee xj builds and project cars. The 2000 jeep cherokee has 15 nhtsa complaints for the engine and. Im interested in swapping in a low mileage salvage motor from a 200204 grand cherokee or a 0206 wrangler. Too bad the head cracked a month later because of an overheat in a 0331 head. Nov 17, 2009 i bought a 2000 jeep cherokee xj limited with the 4. They show up as either coolant in the oil or steam in the exhaust, or both.