03 lb7 smokes whitish-blue

turbojoe

turbojoe

undercover dmax lover
May 7, 2011
20
0
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Farm. Hills, MI
Its an 03 lb7 with 155k and it smoke whitish-blue out the exhaust all the time, more so at idle, the truck runs beautiful. There is no sign of head gasket/inj. cup issues. it does not over pressurize tank or puke out coolant and the top rad. hose does not get rock hard. The oil level is not higher than normal. i checked balance rates, all are within spec and i even individually turned off each injector and the smoke did not change. I tried smelling the exhaust and it smells more like fuel than oil, but its kinda hard to tell. My last idea could be the turbo passing oil into the exh. housing....:dontknow: just wondering if anybody else has ran into this problem.
thanks
Joe
 
Chevy1925

Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
21,222
5,059
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Phoenix Az
turbojoe said:
thing is the guy just changed the oil too. but he said he only drained out about 7-8 qrts...
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hmmm. might check compression and like you said before, check the turbo for oil leaks into the motor. if its the turbo, you could potentionally get a run-a-way motor if it leaks bad enough
 
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PhilsLB7

Way Better Than Facebook
Jun 29, 2009
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Tennessee
Chevy1925 said:
hmmm. might check compression and like you said before, check the turbo for oil leaks into the motor. if its the turbo, you could potentionally get a run-a-way motor if it leaks bad enough
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What do you mean by "run-a-way motor"? Just wanting to understand.
 
KEVINL

KEVINL

Well-known member
Jul 4, 2008
1,431
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Phoenix, AZ
the engine will run off of the oil and since diesels have no throttle they will rev as high as it wants as long as their is oil usually blowing the motor in the process
 
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PhilsLB7

Way Better Than Facebook
Jun 29, 2009
810
0
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Tennessee
KEVINL said:
the engine will run off of the oil and since diesels have no throttle they will rev as high as it wants as long as their is oil usually blowing the motor in the process
Click to expand...

Thanks for the explanation. Hope I didn't derail the thread.
 
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