Blue/ white smoke - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

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Old 02-25-2013, 11:40 AM   eBay Motors  #1 (permalink)
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Blue/ white smoke

Hey guys,
I got my injector balance rate done, and they come back okay. So I'm not sure what's going on with it smoking. I'll start it up to warm and it'll not smoke. But once I start driving it then come to a stop light it starts to smoke. Its look as if its burning oil with some white. I checked my dipstick and it doesn't seem its burning a lot. I couldn't see a CAT under the truck, unless its up by the turbo. So I'm not sure if it has a EGR or not. But any other possibilities what could be causing this? Longer I drive it the more it smokes at stops. Any info would be great!

Thanks.

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Old 02-25-2013, 12:15 PM   eBay Motors  #2 (permalink)
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How does it idle? Surging at all? And what do you mean by the balance rates were "okay". Do you have them on hand? Did you check them with the truck at operating temperature and in park & drive?


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Old 02-25-2013, 12:20 PM   eBay Motors  #3 (permalink)
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Idles fine, no surging. I do not, that's what the mechanic said at the dealership.

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Old 02-25-2013, 12:30 PM   eBay Motors  #4 (permalink)
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Fill out ur sig.. is it an LB7? and balance rates dont always tell you if they're bad or not.
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Old 02-25-2013, 12:33 PM   eBay Motors  #5 (permalink)
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Yes, it's a 03 with 186k on the clock. Oh alright. How else to diagnose a injector problem?

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Old 02-25-2013, 12:41 PM   eBay Motors  #6 (permalink)
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does your oil smell like diesel? pour a whole jug of diesel kleen in her and see if it stops smoking but i would bet its time for new injectors. Lb7s are bad about injectors going bad.
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05' LLY CC/SB 12.41 @109.9 119k
Blake
SDP Twinz, 40% overs, EFILive by me, Stage V trans, BT lock up box
4'' Exhaust, Airdog, Traction Bars, Built Front End,
Big Thanks to Henry and Scott
01' LB7 EC/SB 13.5@97 230k

EFILive by me, Grade C HG, ARP studs,
4 in duals, S@B intake, Airdog, PPE boost valve, BT lock up box on stock trans
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Old 02-25-2013, 02:30 PM   eBay Motors  #7 (permalink)
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I can't smell any fuel in it. But I'll try with diesel kleen and see if that helps.

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Old 02-25-2013, 04:31 PM   eBay Motors  #8 (permalink)
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Does the smoke from the exhaust have a strong diesel odor?
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Old 02-25-2013, 04:43 PM   eBay Motors  #9 (permalink)
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If you put your dipstick fresh from the motor onto a paper towel, you will see an almost rainbow ring spread from the oil into the paper towel IF you have fuel in your oil.
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