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Duramax Third Generation: 2006-2007.5 (LBZ & LLY) Discuss the third generation (2006-2007.5 LBZ & LLY) of the 6.6L Duramax diesel engine & associated components. 2006 LLY engine discussion also belongs in this forum due to the similarities of the 2006 LBZ and the 2006 LLY. Engine related discussion ONLY.

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Old 11-15-2007, 08:54 PM   #1 (permalink)
regcabDURAMAX
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LBZ injector issues

Before I get started with my post and people start questioning my knowledge. I know and understand the duramax motor and the up keep it takes to keep these trucks running in top order. Between my dad and I we have owned 6 duramaxs over the last several years. I traded my 03 LB7 in may to avoid the very common injector issues and bought and 07 classic. Early this week my truck developed a terrible miss on my way home from work. And when i look in my mirror there was a large about of while smoke coming from my truck. I have seen this from two of our LB7 we previously owned and new right away what had happen but didn't want to believe it. I called the dealer and dropped my truck off the following morning. Recived the phone call from the dealer today. Number 5 and number 8 injectors bad at 17,000. Anyone else having any of the same problem or heard of anyone? I treat every tank with treatment and the truck has had 3 fuel filter changes since I have bought it. Anything can or should have done different to avoid this again?
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Old 11-15-2007, 09:45 PM   #2 (permalink)
Coolbreeze
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We have all seen very few LBZ injector issues. My fingers are crossed for you that you just happened to be the guy who got the bad ones in the batch. Don't sweat it so bad until other problems show up.
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Old 11-15-2007, 10:49 PM   #3 (permalink)
kgt
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I work at a dealer and can tell you there is no known issues with the lbz's injectors, its a odd deal to have 2 go out. The only ones we have replaced have had a MAJOR amount of water in the tank(kids dumped it in) forget about it and enjoy the truck!!
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Old 11-16-2007, 12:09 AM   #4 (permalink)
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Why 3 fuel filters in 17,000 miles? I do one every 13-15k... I'm at 50,000 and have never used anything other than whatever comes out of the Diesel pump.

It sounds like you need to start buying fuel somewhere else if this is a common issue with your trucks?
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Old 11-16-2007, 07:57 PM   #5 (permalink)
regcabDURAMAX
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I knew this isn't a know problem just wondered if anyone had Any advise. Yeah 3 filters I Changed the first one with the first oil change, Didn't need to but I did, the second at 15,000 and the third when the motor developed a hesitation the day before the the injectors went out.
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Old 11-18-2007, 01:19 PM   #6 (permalink)
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there is two issues that you will see posted on the net with smoke on a LBZ motor the first and most common is the EGR sticking and it blows blue/wht smke after idleing once in a while. Mines done it maybe 10 times not a issue if it happends. The other smoke issue is gray smoke while on the power hard , again normal. I really would want to know why your truck needed injectors , its not a common problem since the LLY motor came out in 2005 1/2. the lly had wireing issues that where called " injector problems" but very few needed injectors. If its fixed dont give it a second thought but I would find a differnt dealer for service work , I dont think they told you the truth......
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Old 11-18-2007, 07:33 PM   #7 (permalink)
regcabDURAMAX
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I returned the truck back to the dealer I bought it from, They told me injectors 5 and 8 were stuck wide open should have more info on balance rates ect. tomorrow when I talk with the dealer again. Thanks for your input.
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Old 11-18-2007, 08:52 PM   #8 (permalink)
SteveFord
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Quote:
Originally Posted by regcabDURAMAX View Post
I returned the truck back to the dealer I bought it from, They told me injectors 5 and 8 were stuck wide open should have more info on balance rates ect. tomorrow when I talk with the dealer again. Thanks for your input.
Wow I'd want my pistons checked out if they were stuck wide open, not to mention a possible hydrolock upon start up.
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Old 11-18-2007, 09:01 PM   #9 (permalink)
mikek996
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we have a guy that gets his fuel filter done every oil change just because.
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Old 11-18-2007, 11:19 PM   #10 (permalink)
regcabDURAMAX
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I questioned the pistons also when I talked with the dealer. Our first lb7 had a major melt down when an injector stuck open, ended up doing a total rebuild. Hope it doesn't come down to this with the LBZ. We will be keeping a close eye on this for sure.
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