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blowing smoke?

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Old Sep 20, 2012 | 02:04 AM
  #16  
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Hey there Steve. Did we loose a Renix guy?I suppose you know, white steam dissipates, (humidity matters!), and oil smoke that might be bluish hangs allot better. Oil seeping in down past the valve seals/guides might puff more starting it, after it's been parked hot. (and sat a bit). Valve seals and rings might also make a scene after decelerating down a good hill, "backlashing", using the engine for a brake.

But..it's probably not the oil pan gasket. Maybe the oil filter adapter O rings are letting oil run/blow back then down to the exhaust crossover where it is burning off the hot pipe. Just a thought, mine did that. (I put in a "shield" there with wire till I could fix it), Waz afraid it might catch fire! (or attract attention I didn't want)

Is the front CCV tube routed to the air cleaner, and is the air cleaner OK? (or oily) Is that tube free and un-restricted?

Last edited by DFlintstone; Sep 20, 2012 at 02:07 AM.
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Old Sep 20, 2012 | 02:40 AM
  #17  
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Originally Posted by DFlintstone
Hey there Steve. Did we loose a Renix guy?I suppose you know, white steam dissipates, (humidity matters!), and oil smoke that might be bluish hangs allot better. Oil seeping in down past the valve seals/guides might puff more starting it, after it's been parked hot. (and sat a bit). Valve seals and rings might also make a scene after decelerating down a good hill, "backlashing", using the engine for a brake.

But..it's probably not the oil pan gasket. Maybe the oil filter adapter O rings are letting oil run/blow back then down to the exhaust crossover where it is burning off the hot pipe. Just a thought, mine did that. (I put in a "shield" there with wire till I could fix it), Waz afraid it might catch fire! (or attract attention I didn't want)

Is the front CCV tube routed to the air cleaner, and is the air cleaner OK? (or oily) Is that tube free and un-restricted?
no im still a renix lover and my renix runs alot better to
the smoke is not bluish and it still smokes even wen warmed up hot.
im going to try replacing my oil pan gasket this weekend on sunday and maybe the head gasket also what should i be expecting
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Old Sep 20, 2012 | 03:22 AM
  #18  
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Originally Posted by stev-o
what should i be expecting
I'd hit ti with a can of degreaser, then a good cleaning at the car wash 1/2 hr later. I stay pretty clear of the dizzy and the manifolds, and there are obvious places you don't want the nozzle drilling in being too close. (the Map, wire connectors ect). Since you are not hitting the manifold's or TB, you won't ruin the TPS.

Then watch it really close right away, maybe have some nice rags. Finding the leak is supper tough once the oil has blown all over. Then watch it really close right away. With it clean, you could/should find the exact spot where the oil is leaking from. Sun reflected off a mirror is so much better than the best flashlight, I keep little pieces of mirror all over. Even works underneath at sundown! Maybe find the leak for sure, then go from there.

Pulling the pan is no fun, hope it's hot that. How many miles?
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Old Sep 20, 2012 | 06:25 AM
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Originally Posted by stev-o
It runs amazing
When do you see the smoke?
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Old Sep 20, 2012 | 08:15 AM
  #20  
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I would like to know when and from where? Went back and double checked the post. From engine, tail pipe, mid Cherokee? Just started, flooring it, idle, downhill?? This will really narrow down. You say blow smoke, I think tail pipe while warmed up... But you keep mentioning the oil pan. Oil pan would not blow from pipe...details please! ;-)
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Old Sep 20, 2012 | 08:31 AM
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Originally Posted by Juan4you
I would like to know when and from where? Went back and double checked the post. From engine, tail pipe, mid Cherokee? Just started, flooring it, idle, downhill?? This will really narrow down. You say blow smoke, I think tail pipe while warmed up... But you keep mentioning the oil pan. Oil pan would not blow from pipe...details please! ;-)
Like you Juan, I am totally confused at this point.
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Old Sep 20, 2012 | 11:09 AM
  #22  
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Originally Posted by cruiser54

Like you Juan, I am totally confused at this point.
Sorry for all the confusion but the oil pan is errelevent to the smoke I just need to replace the oil pan gasket

It is blowing smoke out or the tail pipe kind of a fait white smoke while its running even after ive been driving it for awhile I have not been able to see if its smokong while accelerating and decelerating due to the fact I cant see the tail pipe while driving
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Old Sep 20, 2012 | 11:40 AM
  #23  
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Whats my oil pressure suppose to be at today on the way into work to oil pressure was at 50 pounds
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Old Sep 20, 2012 | 02:32 PM
  #24  
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She filled it too full - then it smoked.
You drained some out - good.
How many miles driven since?

When it was overfull, oil got in the exhaust - cat, muffler, pipes etc - depending on how much got in there, it takes time to burn off.
Give it 100 miles - bet it'll be fine before then.

Why does everyone think the worst?

What happened to common sense?
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Old Sep 20, 2012 | 03:31 PM
  #25  
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We assume the worst, we are Cherokee owners. Lol

Too much oil always has the potential to blow the O-rings.
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Old Sep 20, 2012 | 04:48 PM
  #26  
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Originally Posted by LeRoy90laredo
We assume the worst, we are Cherokee owners. Lol

Too much oil always has the potential to blow the O-rings.
Is this a new "old wive's tale"? What o-rings? Oil rings?

rrich is correct. Give it some time. If you suspect rings, do a compression test dry, then wet. Valve seal failure is fairly common on 4.0s. That could be all this is.

And oil pressure has nothing to do with smoking.
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Old Sep 20, 2012 | 05:39 PM
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AAAND - If the leak has burned onto the pipes it may take a long time to burn off - even hundreds of miles.
Scrape it off, then clean it with carb cleaner.

Even then it may still smoke for a while.

IF it's coming out the tailpipe, catch some on a white rag - you'll see what it is.

white/blue, steam, oil, ATF etc - subject to interpretation

The problem with a compression test is - always good to do - often oil control rings don't show as low compression.

Getting lots of blow by?

After 50+ miles, tell us WHEN yoiu see the smoke. Idle, cruise, acceleration, deceleration? All are different causes.

Last edited by rrich; Sep 20, 2012 at 05:45 PM.
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Old Sep 21, 2012 | 01:49 AM
  #28  
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Get somebody to follow you, preferably with a dash cam.
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Old Sep 21, 2012 | 09:07 PM
  #29  
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Originally Posted by cruiser54
Is this a new "old wive's tale"? What o-rings? Oil rings?

rrich is correct. Give it some time. If you suspect rings, do a compression test dry, then wet. Valve seal failure is fairly common on 4.0s. That could be all this is.

And oil pressure has nothing to do with smoking.
i was referring to the piston rings. i apologize for any confusion on that side.

any improvement though, Steve?
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Old Sep 21, 2012 | 09:15 PM
  #30  
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Originally Posted by LeRoy90laredo
i was referring to the piston rings. i apologize for any confusion on that side.

any improvement though, Steve?
no its still smoking
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