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Unread 10-05-2006, 02:43 PM   #1
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2012 MK Patriot 
Join Date: Jan 2005
Location: Adirondacks, UpstateNY
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91 I6 random smoke (91 w 200k)

I have a 1991 xj I6 with about 200k miles on it. It only smokes once per drive. At random times it will smoke like crazy for a few minutes then if i stop and let it idle and it will go away? it also spits a little oil out of the exauhst. But it only does it at random times, it is not a continous thing. I am sure that it is the result of a bad head gasket but the engine nor jeep is worth putting alot of money into. It does have a 6" lift with 35s and i dont want to ditch it just yet. I was just wondering what every one thought. any suggestions on a few good additives to help it along? any suggestions at all? I dont want to put alot of money into the engine since it has 200k on it. I guess if i need to i can throw in a head gasket but i would rather not. I dont think it is really worth it.

RIP MY JEEPS... 1998-TJ 1992-XJ 1999-TJ 1994-XJ 1998-ZJ... All were lifted and locked...
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Unread 10-07-2006, 01:18 PM   #2
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2006 TJ Wrangler 
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I am not sure why you think it's the head gasket. I think it may have the gaps on the rings aligning randomly ( 200M miles) If it smokes when you first start it, I would say valve guides.
Good luck
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Unread 10-13-2006, 08:11 PM   #3
1995 FSJ Cherokee 
Join Date: Feb 2005
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my 93 grand cherokee does the same thing. it is usually at a light smokes for a little while then quits, looks like it is time to stroker it.
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Unread 10-13-2006, 09:03 PM   #4
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1995 YJ Wrangler 
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I had a Ramcharger with a 318 at one time that always smoked on startup and usually smoked when pulling away from a stop sign or red light. It probably had half the mileage as your engine. The valve seals were deteriorated. It was an easy fix...............chim
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Unread 10-14-2006, 12:11 PM   #5
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1984 CJ7 
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Like mentioned above, your valve guides are most likely worn and that lets oil seap into the combustion chamber... hence smoke.

Oh and that's not oil coming out of your exhaust, it's water vapor mixed with carbon deposits from running rich.

I6 + 200k = rebuild time.
I used to own two CJ's...Perhaps a 3rd is in the future?
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