Another option but head gasket? - JeepForum.com
 
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post #1 of 11 Old 04-01-2012, 07:46 PM Thread Starter
gmm11
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Another option but head gasket?

Okay, I have a 2000 wj, 4.0 97xxx miles. it runs great, untill, today. i pulled her in the garage for a front brake swap. finished up. and as i was pulling out it was smoking so bad i couldn't see out of my mirrors. shut it off. very sweet smelling smoke. im guessing antifreeze.

could this be anything else??


Last edited by gmm11; 04-01-2012 at 08:06 PM.
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post #2 of 11 Old 04-01-2012, 09:57 PM
Freighttrain
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Death by Cracked 0331 head?
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post #3 of 11 Old 04-02-2012, 06:46 PM Thread Starter
gmm11
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9331?
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post #4 of 11 Old 04-02-2012, 07:21 PM
Freighttrain
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2000 and 2001 they used a new casting. The casting number was 0331. They were a little thin in the skin and cracked between 3 and 4 leaking coolant into the oil.
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post #5 of 11 Old 04-02-2012, 08:20 PM Thread Starter
gmm11
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okay.. could this make it smoke so freaking bad? and is this a common problem
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post #6 of 11 Old 04-03-2012, 03:45 AM
Freighttrain
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Not sure.From my reading usually it leaks coolant on top of the head and into the oil but that doesn't mean the crack couldn't make it behind the valve and leak into the intake or exhaust.Something to look at.But you have something bad wrong.Sweet smelling steam out the tail pipe can only mean one thing.Your vaporizing antifreeze either in the combustion chamber or the exhaust port.The head pretty much has to come off to find the problem.I don't think there is a coolant passage in the intake like some of the older Carbed engines....but don't hold me to that.....
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post #7 of 11 Old 04-03-2012, 10:17 AM
muddr1
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It should be white smoke if its antifreeze

If we knew what we were doing it woulnt be called research
Albert Einstein
There are no rules here, were trying to accomplish something.
Thomas Edison Keep Calm,Chive On
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post #8 of 11 Old 04-03-2012, 10:51 AM
mdm
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He didn't say what color the smoke was. There is only three things that will produce smoke out the exhaust.
Fuel, oil, and coolant. The only one that smells sweet is coolant.

It's time to pull the head.

Keep in mind that free advice can frequently be worth less than you pay for it.
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post #9 of 11 Old 04-03-2012, 08:35 PM Thread Starter
gmm11
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its white smoke, and yes. its time to pull the head.. is there anyway to check for a crack before i pull it?
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post #10 of 11 Old 04-05-2012, 01:21 PM Thread Starter
gmm11
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okay, so yesterday i put about 40 miles on. at first it smoked.. it didnt quite have time to heat up..drove to work after it cooled from the little trip to the store.. no smoke at all. had no smoke on the ride home from work. what could this be?
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post #11 of 11 Old 04-05-2012, 01:26 PM
Superfuman
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Id wait a day or two to see if it occurs again. Maybe it was a freak occurrence. It might still be a cracked head and maybe some carbon or engine crap plugged the crack for a while? If it happens again, here's your chance to build a stroker!

2000 TJ - JB Headers FM Super 44. RC 3.25'' on 31s.
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