Chevy/GMC Duramax 01-04 LB7 Discussion of Chevy and GMC Trucks with LB7 Duramax Turbo Diesel Engines

Lb7 Help Excessive white smoke out dipstick, oil fill and exaust

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Old Jul 22, 2013 | 11:01 PM
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DuramaxFerg's Avatar
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Default Lb7 Help Excessive white smoke out dipstick, oil fill and exaust

I am banging my head. Just replaced injectors, had them tested and all were under .5 on the rates looked mint. no oil loss, no coolant loss or backpressure (bubbling), no oil in large turbo lines, clean air filter, new fuel filters on my fass 150, ran compression test on all cylinders the all spec'd at 390-400. help?
 

Last edited by DuramaxFerg; Jul 22, 2013 at 11:05 PM.
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Old Jul 23, 2013 | 01:12 AM
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sounds to me that you have an issue with one or more of the copper washers that seal the injectors in the cups.

if you are sure the copper washers are ok then try an Italian tune up

---AutoMerged DoublePost---

also check your PCV lines, clogged or kinked
 

Last edited by 2004LB7; Jul 23, 2013 at 01:12 AM. Reason: Automerged Doublepost
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Old Sep 4, 2013 | 08:00 AM
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whats an italian tune up? i've never herd that one before
 
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Old Sep 4, 2013 | 11:03 AM
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Originally Posted by mmaranto
whats an italian tune up? i've never herd that one before
drive it like you stole it.

these engines run best when under load. running the engine hard and hot every once and a while helps clean up carbon deposits and provide a better seal on the rings and valves. this is a poor mans tune tune up but sometimes necessary.

goggling "Italian tune up" will bring up a lot of info.
 
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