BLOWS BIG CLOUD OF BLUE SMOKE AT IDOL
#1
BLOWS BIG CLOUD OF BLUE SMOKE AT IDOL
i HAVE AN 04 LB7 DURAMAX WITH 112,000 MILES, WHEN IT IDOLS IT TENDS TO BLOW A BIG CLOUD OF BLUE SMOKE HAVE CHANGED THE FUEL AND AIR FILTER IT DOESN'T REGISTAR ANY CODES, AND ONCE AND A WHILE IT COULD SMELL A LITTLE LIKE ANIT FREEZE. HASN'T LOST ANY POWER AND FULE MILEAGE IS STILL THE SAME AS ALWAYS HAS BEEN. LOOKING FOR SOME IDEAS AND WHAT CAUSES THE BLUE SMOKE ONCE YOU START MOVING IT IT CLEARS OUT AND WHEN YOU PUNCH IT IS BLACK SMOKE. cONCERNED THE TRUCK HAS NEVER BEFORE BLOWN ALOT OF SMOKE
#2
blue smoke is usually burning oil
Possibility - The coolant flow through the turbo unit may be reduced, which results in the temperature becoming so high that the engine oil builds carbon deposits around the turbine-side bearing. Over time these deposits reduce the oil flow through the bearing, which means that engine oil is forced past the turbine shaft seal and out into the exhaust pipe, resulting in blue smoke
Possibility - The coolant flow through the turbo unit may be reduced, which results in the temperature becoming so high that the engine oil builds carbon deposits around the turbine-side bearing. Over time these deposits reduce the oil flow through the bearing, which means that engine oil is forced past the turbine shaft seal and out into the exhaust pipe, resulting in blue smoke
#3
might want to have the injectors checked. sounds like one may be leaking. if you let it goes you might hydro lock your engine. and that sucks. expecially at 7o mph on the freeway .....
dont ask how i know!
dont ask how i know!
#5
Check the oil. Is it high or low? Does it smell like diesel fuel or is it discolored? How about coolant? Low coolant level? Is the coolant bubling?
I am thinking bad injector(s) or blown head gasket.
I am thinking bad injector(s) or blown head gasket.
#6
i HAVE AN 04 LB7 DURAMAX WITH 112,000 MILES, WHEN IT IDOLS IT TENDS TO BLOW A BIG CLOUD OF BLUE SMOKE HAVE CHANGED THE FUEL AND AIR FILTER IT DOESN'T REGISTAR ANY CODES, AND ONCE AND A WHILE IT COULD SMELL A LITTLE LIKE ANIT FREEZE. HASN'T LOST ANY POWER AND FULE MILEAGE IS STILL THE SAME AS ALWAYS HAS BEEN. LOOKING FOR SOME IDEAS AND WHAT CAUSES THE BLUE SMOKE ONCE YOU START MOVING IT IT CLEARS OUT AND WHEN YOU PUNCH IT IS BLACK SMOKE. cONCERNED THE TRUCK HAS NEVER BEFORE BLOWN ALOT OF SMOKE
Last edited by DangerousDuramax; 10-18-2007 at 04:32 PM.
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#9
My bet is on the injectors, mine pooped out on me at 115k. They fail in 2 different ways, either it fill the crank case up with diesel fuel, or cause smoke at idle. Could be a bad injector. You can take it to the stealership have them diagnose it for you for about 90 dollars, and if it is the injectors that are bad you should have them fixed because GM extended their injector warranty to 2004 lb7's. You have too many miles on your truck to have it fixed under the 100k engine warranty if something else is bad.
If you have any programmers on your truck take it off and make the truck as stock as possible, they usually don't care about exhaust or intake, and head for the dealer.
Here is the special policy for the lb7 injector issue print it out and keep it inside your center council and if they try to charge you for injectors shove that in their face.
hmm.... it seems like the special paper is too long
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yeah, "The text that you have entered is too long (12057 characters). Please shorten it to 10000 characters long."
Ill try and PM. you the special policy
---AutoMerged DoublePost---
cant send pm either!
If you have any programmers on your truck take it off and make the truck as stock as possible, they usually don't care about exhaust or intake, and head for the dealer.
Here is the special policy for the lb7 injector issue print it out and keep it inside your center council and if they try to charge you for injectors shove that in their face.
hmm.... it seems like the special paper is too long
---AutoMerged DoublePost---
yeah, "The text that you have entered is too long (12057 characters). Please shorten it to 10000 characters long."
Ill try and PM. you the special policy
---AutoMerged DoublePost---
cant send pm either!
Last edited by 2500HeavyDuty; 11-24-2007 at 02:30 PM. Reason: Automerged Doublepost
#10
My 03 Dmax did this from the day I bought it..... Took it to the dealer on about the 5th time they replaced the Injectors and the problem went away....