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Old 01-19-2009, 04:42 PM   #1
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replacing head gasket

I'm a newbie here,
Does anyone knows the cost to replace or rebuilt engine? I have a 2001 Wrangler Sport 4.0L.
I have a blown head gasket last week, My friend help to replace them, and after 30 hrs of work. I still have chocolate shake inside the engine.

I am tired of trying to remove the gasket again. Is it cheaper to buy a rebuilt engine and ask dealer or if you know any mechanic that will do it for less price than dealer?

The milage is only 88K and I also have low oil pressure on the gauge eventhough I have replaced the sending unit.

HELP !!!!!

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Old 01-19-2009, 04:53 PM   #2
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well you can get an atk engine for around $2300. it's a crate motor. i think there is another company called golden eagle that does 4.0 rebuilds. not sure of their pricing. you can pick a motor out of the junk yard for under $1000 or you can find a mechanic to rebuild it. i'm sure if you shop mechanics you'll find that their prices will vary greatly. talk to someone you trust their opinion and ask them which mechanic they would use or use. if someone has a good reputation then their probably a good mechanic. don't ask the dealer because they only look at the bottom line and the lining of their pockets. antoher possibilty is taking it to a vocational school if you could do with out your vehicle for a week or so and they will repair it free of a labor charge but you have to buy the parts. you can pick up a 4.0 rebuild kit for around $650. just a few options. also check your local parts stores, most likely then can get you an engine too. auto zone quoted me $1340 + $300 core charge.

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Old 01-19-2009, 05:05 PM   #3
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it is most likely a bad head. did you have the head machined, and checked at a machine shop when you had it off. this is crucial to avoid this kind of outcome. i say if you didn't have the head checked, do it. then i've heard that some of the 4.0 heads have such small cracks they don't always catch it. there's a casting number on the heads, one of them is more prone to cracking. you might have that one, i'd replace it with a different casting number head.

you probably don't need to chuck the whole engine over this.
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Old 01-19-2009, 09:08 PM   #4
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Ditto on the bad head...

... you should ALWAYS have the head checked and surfaced when replacing a failed head gasket... there was a reason the head gasket failed, and this reason likely also did damage to the head....it's not a huge expense, but a must to get the job done right.
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Old 01-19-2009, 10:28 PM   #5
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Old 01-29-2009, 05:30 PM   #6
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Thanks guys..found out I have a cracked block and replaced them with a factory remanufactured block. it cost $700.
I still have low pressure oil when the engine gets warmed up. I have already replaced the sending unit. Someone told me that I have replaced the "light pressure sending unit" and not the "Gauge pressure sending unit".
The one I replaced was the one next to firewall behind the oil filter. I dont know which one is for the "gauge sending unit" can someone give me ideas?
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Old 01-29-2009, 05:57 PM   #7
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you got it, thats the only one if i remember right
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Old 01-28-2010, 11:36 PM   #8
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Quote:
Originally Posted by waterhydrant View Post
I'm a newbie here,
Does anyone knows the cost to replace or rebuilt engine? I have a 2001 Wrangler Sport 4.0L.
I have a blown head gasket last week, My friend help to replace them, and after 30 hrs of work. I still have chocolate shake inside the engine.

I am tired of trying to remove the gasket again. Is it cheaper to buy a rebuilt engine and ask dealer or if you know any mechanic that will do it for less price than dealer?

The milage is only 88K and I also have low oil pressure on the gauge eventhough I have replaced the sending unit.

HELP !!!!!
ok- Lets take into consideration you have the casting number 0331 on the head. If you do the head is more than likely got a hairline crack in the middle of the head on top. a machine shop should tell through pressure testing or magnafluxing if its bad for about 20 dollars. If it is DO Not get a head through o'reilly's or Auto-Zone. It will be a 0331 cast number. Contact ALABAMA Cylinder head co. The head will cost 525.00 delivered to your door. By the time you replace the oil pan gasket , oil pump, head gasket set(around 200.00) and everything goes fine -which it wont. Its a jeep- your going to have around 1600-2000 dollars in parts.this is also a good time to do the timing chain. The lower end of your motor will still have 86 k miles on it. If your very very lucky your mains and cam etc will be ok. Wost case. you need a long block motor. Complete-but you will get a 0331 head. It is cheaper to do a whole motor. Check around-the have warranties from 33000-to 100000 miles this will have to be installed by a qualified shop there are alot of parameters the engine manufacture have which if not followed will void the motor warranty and there you sit with a expensive box of bolts. contact a local service garage.the rates are usually a little cheaper. you can do a leak down test by pulling the spark plugs and let it sit overnight if antifreeze is coming out of one then you also know what cylinder the problem is from. the oil problem is from the sensor being washed out by antifreeze. change it. run a heavier oil and don't drive it until you figure out if the head is cracked. I just went through the long way of this on my 01 wrangler-about 80k miles.I caught the oil prob immediately.and replaced the head. But I have over 2000 in parts tied up in this too so should have done a long block! good luck!
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Old 01-28-2010, 11:46 PM   #9
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your oil pump is junk go to a MELLING high volume it is 20 percent over stock your pressure will top 40 consistently, go to a K&N oil filter it will pick the pressure up about 3-5 lbs. you do not need a pick up tube or a welder the pick up tube comes with the Mel ling. The oil pan is very hard to get off look through a Chilton's book first and use correction fluid or paint to mark the studs most are on the drivers side these need to be put back where they came out! or take a digital picture of this before you start. take several. an oil pan gasket is around 26 dollars and the pump around 60. So it should be under 100. if you do it yourself Auto zone or any parts store can get this pump for you. Stay away from re man and o.e.m. oil pumps!
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Old 03-09-2010, 05:19 PM   #10
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spuspusputtering..

Hey guys, I have a 95 wrangler, 6C, 4L
All of a sudden, when just idling, my RPMs will sputter down at about 1/2 then shoot back up to a grand!!!! The same problem happens when I'm driving regular, up and down with the RPMs and sputtering like a mother EF'er. My boyfriend thinks it's a blown water pump gasket (because it leaks real bad when I start my engine) but im trying to get more ideas before I tackle that monster.

Any ideas out there jeep wizards?
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Old 06-08-2011, 06:35 PM   #11
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Quote:
Originally Posted by YJackie95 View Post
Hey guys, I have a 95 wrangler, 6C, 4L
All of a sudden, when just idling, my RPMs will sputter down at about 1/2 then shoot back up to a grand!!!! The same problem happens when I'm driving regular, up and down with the RPMs and sputtering like a mother EF'er. My boyfriend thinks it's a blown water pump gasket (because it leaks real bad when I start my engine) but im trying to get more ideas before I tackle that monster.

Any ideas out there jeep wizards?
check the map sensor mine was doing that and that is what it was. sounds like the water pump gasket is blown also change that also. when it rains it pours have fun!!!

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