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Still blowing blue?

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Old Apr 21, 2015 | 06:39 PM
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Still blowing blue?

Previously, I had had a problem with my '95 7.3 blowing huge clouds of blue smoke. I got my Garrett rebuild kit from Riffraff, and got it installed hoping to solve the problem. It got better, but it's still hazing blue. I had it idle for about 10 minutes, then about 10 more after a break. I'm a bit confused as to what this could be. Is there any way that a bad CCV can allow oil through the turbo? Also, stupid question- anyone know about a bad CPS causing a blue haze? I read about that on here someplace.


Edit- My 7.3 starts like a beast, but it doesn't have a Tach reading when it cranks. I believe that the CPS controls the tachometer in our OBS pickups. Any way that I have a CPS that's failing, but not fully gone?
 
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Old Apr 21, 2015 | 06:56 PM
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If the turbo was in fact your issue it may take some driving to burn all the residue out of the exhaust.
 
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Old Apr 21, 2015 | 07:01 PM
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So it could just be residual from the exhaust/oil from lubing turbo during rebuild? I'll let it run a while again, and see what happens.
Thank you.
 
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Old Apr 21, 2015 | 07:13 PM
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You may need to drive it.the exh tempwill need to get higher rthan just idle will provide
 
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Old Apr 21, 2015 | 07:38 PM
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Sounds good. Next question- A throttle "kick" will create a big puff of white smoke, and a leak of oil. I'm a bit stumped on it. A slow application of throttle doesn't do this, but sudden pressure does. Any guesses? An o-ring somewhere? Maybe under the turbo pedestal?
 
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Old Apr 21, 2015 | 08:04 PM
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You may have to look. Too many possibilities to speculate.
 
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Old Apr 22, 2015 | 07:31 AM
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Go put 5-10 miles on it and see if it clears.
 
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Old Apr 23, 2015 | 06:31 PM
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So, I've driven it a bit. It still hasn't gone away. I'm beginning to suspect it could be a problem with my CCV, since I have a bit of oil on the compressor side of my turbo.


On a somewhat-related note- My Turbo spools, and sounds great after the rebuild. Also, it hasn't gone "Kaboom" yet, so I've got that going for me.
 
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Old Apr 23, 2015 | 06:54 PM
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Having oil in the compressor side is normal

Does the smoke smell like oil or does it burn your eyes ?
 
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Old Apr 24, 2015 | 01:42 PM
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Smells like oil, and burns.
 
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Old Apr 24, 2015 | 02:27 PM
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Oil in the exhaust pipe? Might have to pull the down pipe off the turbo and see if it is wet. Do you have a muffler? Could oil be sitting in it?
 
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Old Apr 24, 2015 | 07:51 PM
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John- The turbo just went back on after a rebuild. Downpipe was all dry when turbo was pulled/replaced.

I do have a muffler on it. Would that imply that the oil would be residual?
It's as good an excuse as any to cut out the muffler.....

Additionally- my sad moment for the day for you. Got to watch a guy in a "Fisher-price My First Lifted Diesel" back into my pickup, then speed away before I could talk to him. Not so sad- barely a scratch on my OBS.


Edit- Thank you, John.
 
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Old Apr 25, 2015 | 07:07 AM
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What I was getting at was the turbo could be leaking oil on the exhaust side. Pulling the downpipe and checking is pretty quick and easy, just to eliminate that as a possibility. But, since the downpipe was dry when you pulled it to do the rebuild, then residual oil in the muffler would be unlikely in my opinion.

And sorry to hear about somebody backing into your truck and running off.
 
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Old Apr 25, 2015 | 07:22 AM
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If the dp was dry then how could a turbo rebuild eliminate the turbo leaking thus causing the smoke ?
The only ones I have seen smoke from turbo leaks literally had oil about dripping from the tail pipe.
I am not sold that you have the correct issue remidied.sorry.just my opinion.
 
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Old Apr 25, 2015 | 08:39 AM
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I'm pretty confident I don't have it. I have oil residue at the back of the tailpipe, but not at the downpipe. I have no idea how. I'm gonna try a new CPS, and pigtail, just as a "why not" measure...
 
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