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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 01-25-2013, 09:16 PM   eBay Motors  #31 (permalink)
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It is over the years. This special policy is done. It is worth talking to the dealer but you or anyone else would be extremely lucky to get the injectors covered
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Old 06-09-2014, 09:44 PM   eBay Motors  #32 (permalink)
 
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another one bites the dust...

'02 Chev 2500HD 128k miles, making oil like nobody's business, bllowing out the breather tube...should've had the injectors done when I bought it in '08... hindsight=2020... oh well... Gonna take it in to Haselwood in Bremerton, WA and see if I can swing some sort of deal...
Any suggestions on what I should ask for?
I plan on requesting: balance and return rates, supply and return pressure hold, Bosch reman replacements and amsoil (I'll supply).
Anything else??
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Old 07-05-2014, 12:36 PM   eBay Motors  #33 (permalink)
 
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So I have a problem with my 2003 lb7. I just changed fuel filter and now when pulling a grade or getting into the throttle from about half way my truck getting a clatter and loss of power. Let off on the pedal it goes away as long as I don't push it. Then it shuts off going down the road. So thought I was sucking air so I did the filter again and orings on filter housing and it went away got all power back and no shutting down for about a week. Well now it's doing the same thing. Any ideas would be appreciated I'm new to the diesel ownership.
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Old 08-12-2014, 12:10 AM   eBay Motors  #34 (permalink)
 
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LB7 replacement injectors

Can anyone give me an estimate on what the life expectancy is on the updated LB7 injectors? My original injectors are finally giving out at 116K with an estimated 6000K bill at the dealer. Is it wise to replace the injector pump while I'm at it? Any info would be a great help.
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Old 08-12-2014, 07:16 AM   eBay Motors  #35 (permalink)
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Quote:
Originally Posted by Jakev86 View Post
So I have a problem with my 2003 lb7. I just changed fuel filter and now when pulling a grade or getting into the throttle from about half way my truck getting a clatter and loss of power. Let off on the pedal it goes away as long as I don't push it. Then it shuts off going down the road. So thought I was sucking air so I did the filter again and orings on filter housing and it went away got all power back and no shutting down for about a week. Well now it's doing the same thing. Any ideas would be appreciated I'm new to the diesel ownership.
Sounds like a CP3 not giving enough pressure....
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02' Silverado 2500HD CCLB LB7 4x4
Motor:
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Edge Insight CTS, Magnaflow 5" Turbo Back (Straight Piped), Maganflow LB7 Down Pipe, S&B CAI, PPE Boost Valve, Airdog II 165gph, Nicktane w/CAT 1R-0750
Suspension:
Kryptonite UCA's, Bilstein 5100 shocks, Moog idler arm& support, Moog pitman arm
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Old 08-12-2014, 07:19 AM   eBay Motors  #36 (permalink)
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Quote:
Originally Posted by SWelch165 View Post
Can anyone give me an estimate on what the life expectancy is on the updated LB7 injectors? My original injectors are finally giving out at 116K with an estimated 6000K bill at the dealer. Is it wise to replace the injector pump while I'm at it? Any info would be a great help.
Life expectancy on LB7 injectors is all over the board... Some people are getting 200k+ out of them, others 34-40k. With clean fresh diesel and good filtration I would think you should get at least 75k out of them.... I did mone last year when I bought my truck, I have put 34k on them since, and my balance rates are still +/- 1. 6k seems to high for a injector job. Find a reputable diesel shop near you, I had the dmax streo do mine, I wanna say it was right around 4k...
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02' Silverado 2500HD CCLB LB7 4x4
Motor:
EFI Live (tuned by Kory - PPEI)
Edge Insight CTS, Magnaflow 5" Turbo Back (Straight Piped), Maganflow LB7 Down Pipe, S&B CAI, PPE Boost Valve, Airdog II 165gph, Nicktane w/CAT 1R-0750
Suspension:
Kryptonite UCA's, Bilstein 5100 shocks, Moog idler arm& support, Moog pitman arm
Other:
B&W Turnover Ball Gooseneck
Tekonsha P3
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Old 09-13-2014, 09:57 AM   eBay Motors  #37 (permalink)
 
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SECOND injector failure!

I had to have injectors replaced in 2010 at a 103,400 miles. Though well under 200K, GM refused to cover b/c truck was mfrd. in July '02. I bit the bullet and replaced injectors for $4000. Dealer assured me that injectors had been redesigned and that LB7 was no longer a problem. Repair had 30K warranty. You guessed it--another failure at 104,700 (that's 31,300 on the new injectors if you're counting). I'll take a run at GM and the dealer but can guess what the response will be. Any suggestions?

Incidentally, my mechanic says he is seeing this all the time. His opinion is that it is caused by contaminated fuel (especially water) causing the injectors to stick or leak due to corrosion and wear of the tips, as well as the lower lubricating properties of low sulfur fuel. Suggestions I've seen for prevention are use of a lift pump, additional filtration down to 2 microns, and use of 1/2 quart of tranny fluid in each tank of fuel for additional lubrication. Any comments?
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Old 09-13-2014, 01:06 PM   eBay Motors  #38 (permalink)
 
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Durango,
I ended up rebuilding the filter head with a kit from MA. Kit seemed to help as I was getting air in the fuel which we all know is not good. Now I am having an intermittent issue with the throttle. Has gone in to limp mode once before clearing itself, and once where I had no response and almost stalled the motor pressing the pedal to the floor. I'm not sure if the injector pump is going out or if there is some other issue I'm unaware of. I'm looking for feedback on a quality lift pump and additional filtration if you or anyone else has suggestions. As far as the ATF in the fuel, I have been using a quart every time if fill up for years now. Its my understanding the detergents help with keeping the system clean and obviously added lubrication to help combat the "new and improved" fuel being blended for us now. Good luck with the dealer and GM on your injector issues. I hope they do what is right for you, but I wouldn't hold my breath.
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