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Unread 08-17-2015, 06:05 PM   #1
JeepJeepImABeep
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2002 TJ Wrangler 
 
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help me find fluid leak and smoking problem

Jeep smokes gray smoke from engine compartment very badly after running for a while and turning her off. Smells like some kind of burnt oil, not sweet and not coolant. I am losing power steering fluid like mad but the wet spots from the power steering fluid are not near where the smoke is coming from, smoke is coming from around one of the oxygen sensors. I did have an oxygen sensor error code a few weeks ago which I cleared and ignored but doesn't make sense that it is causing the smoke.

Here's the oxygen sensor in question, where the smoke comes from:


A better look at it:


You can see power steering fluid drip (I think) on my driver front tire:
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But the oil pan looks pretty wet too:


Same with the side of the engine, pretty wet looking:



The transmission looks wet too though:



I think this thing under the front is also dripping power steering fluid:


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Unread 08-18-2015, 02:42 PM   #2
JeepJeepImABeep
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It only seems to smoke when I've been driving it around a bit, and also it's not overheating and not coolant.
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Unread 08-18-2015, 03:26 PM   #3
Fozz625
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Did you check your power steering hoses while someone turned your steering full lock and held pressure? The hoses are prone to pin holes that don't show up unless the pressure is built up from turning.
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Unread 08-18-2015, 07:40 PM   #4
JeepJeepImABeep
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Quote:
Originally Posted by Fozz625 View Post
Did you check your power steering hoses while someone turned your steering full lock and held pressure? The hoses are prone to pin holes that don't show up unless the pressure is built up from turning.
Where can I find those and also would that explain the smoke coming from around the oxygen sensor area?
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Unread 08-18-2015, 08:38 PM   #5
Fozz625
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Just follow the hoses from the power steering pump. If there is a hole it will be very obvious. I would have a fire extinguisher on hand. If the fluid hits the exhaust manifold it could flash.


Edited to remove extra word.
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Unread 08-18-2015, 08:46 PM   #6
Fozz625
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And yes that could explain the fluid you seeing as,well as the smoke and burning smell. I would not drive the Jeep until I found and repaired the problem. It would be a shame to burn your vehicle to the ground.
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Unread 08-18-2015, 10:46 PM   #7
JeepJeepImABeep
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Thanks I'll check that tomorrow morning... the power steering pump is attached to where I put power steering fluid in, right?
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Unread 08-19-2015, 06:55 AM   #8
DoomsdayTJ
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Quote:
Originally Posted by JeepJeepImABeep View Post
Thanks I'll check that tomorrow morning... the power steering pump is attached to where I put power steering fluid in, right?
Yes, it is driven by the belt and is attached to where you put the fluid in.
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Unread 08-20-2015, 10:58 AM   #9
JeepJeepImABeep
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I checked the two hoses that come from the bottom of the power steering pump. I can't find any holes in them and the hoses themselves aren't wet, but the big metal thing they plug into at the bottom front of the jeep is all wet. Still at a loss though, because that is not anywhere near the oxygen sensor where the smoke is coming from.
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Unread 08-20-2015, 11:13 AM   #10
biffgnar
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Quote:
Originally Posted by JeepJeepImABeep View Post
I checked the two hoses that come from the bottom of the power steering pump. I can't find any holes in them and the hoses themselves aren't wet, but the big metal thing they plug into at the bottom front of the jeep is all wet. Still at a loss though, because that is not anywhere near the oxygen sensor where the smoke is coming from.
Fluids from anywhere up front can get blown back onto the exhaust and smoke. Don't get to fixated with where the smoke is coming from.
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Unread 08-20-2015, 12:23 PM   #11
Jeepsr4me
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That oil pan is about to BLOW..... rust thru....
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Unread 08-20-2015, 01:01 PM   #12
Partsmke
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Oil on your tire seems to be gear oil coming past the inner axle seal. Are you having a "blow-by" issue? What does the air filter look like? I'm assuming that it is connected to the valve cover.
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Unread 08-20-2015, 04:04 PM   #13
JeepJeepImABeep
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Quote:
Originally Posted by biffgnar View Post
Fluids from anywhere up front can get blown back onto the exhaust and smoke. Don't get to fixated with where the smoke is coming from.
Well it's just weird that it's coming from around the oxygen sensor, and I had the oxygen sensor code on the check engine light. Also, I'm noticing the jeep is stalling out and has a rough idle (also oxygen sensor?)

Maybe I should replace the O2 sensor anyway. But I'm not sure which one to get. Can you tell from the picture if it's upstream or downstream?
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Unread 08-20-2015, 04:05 PM   #14
JeepJeepImABeep
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Quote:
Originally Posted by Partsmke View Post
Oil on your tire seems to be gear oil coming past the inner axle seal. Are you having a "blow-by" issue? What does the air filter look like? I'm assuming that it is connected to the valve cover.
I will take a look at the air filter and let you know.
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Unread 08-20-2015, 04:11 PM   #15
JeepJeepImABeep
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I tried taking the picture of the smoke after I took the jeep around the block from a cold start, literally less than 1 minute of driving. But it doesn't really show up in the picture. If I drive it a bit more the smoke will really come out.
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