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LB7 FAQ's

Discussion in '01-04 LB7' started by Diesel Dually, May 4, 2008.

  1. Diesel Dually

    Diesel Dually awaiting your return...signed... your friends

    506
    0
    May 3, 2008
    Mile High
    Lets start a FAQ section here.

    Post up the questions, answers TSBs and I will consolidate them all into one FAQ Post...with credit due to the original poster.
     
  2. ZF6 MAN

    ZF6 MAN The Unwritten rule

    30
    0
    May 3, 2008
    Fuel Injection

    Q: What are the symptoms of fuel injectors failing?
    A: Poor fuel economy, excessive smoke and smell at idle, rough idling, engine oil contaminated with Diesel fuel, hard starting, excessive fuel return rates, reduced engine power, illumination of check engine light

    Q: I think my fuel injectors are failing are they covered by warranty?
    A: All 2001-2004 LB7 code duramax diesels are covered by warranty for 7 years of original service or 200,000 miles whichever comes first.

    Q: Can I buy aftermarket injectors so I wont suffer injector failure?
    A: No, Bosch makes all of the injectors for these engines however there are aftermarket nozzles (tips) that can allow for more fuel flow.
     
    Last edited: May 6, 2008
  3. Smokin LB7

    Smokin LB7 Just Takin' it From a Dig

    34
    0
    May 13, 2008
    Greeley, CO
    Q. Is the LB7 diesel motor the best Diesel every made?
    A. HELL YA!!!!

    Q. What kind of power can a stock LB7 motor hold reliably as a daily driver?
    A. Generally most have found that 500RWHP is a fairly safe reliable number, BUT EVERY MOTOR IS DIFFERENT.

    Q. What years do the LB7's come in?
    A. 2001-2004.5

    Q. In this time of outrageous fuel prices and a tough time keeping the tank full, what can I do to get a little more mileage out of my LB7?
    A. Exhaust and intake have shown to help minimally, however it seems as though tuning is where people are making the most gain. Every engine and programer are all different and show different results
     
  4. Smokin LB7

    Smokin LB7 Just Takin' it From a Dig

    34
    0
    May 13, 2008
    Greeley, CO
    Q. What is the stock LB7 rated at?
    A. ?

    Q. What kind of times do stock LB7's run?
    A. ?
     
  5. Gruber

    Gruber Tin Can Rider

    504
    0
    May 4, 2008
    1000 Oaks, California
    Q. On the 2004 Duramax how can I tell if I have and LB7 or an LLY

    A. Check the 8th digit of Vin.

    If it is a One (1) it is an LB7

    If it is a Two (2) it is an LLY
     
  6. Cheyenne19

    Cheyenne19 Special agent C19 A(ACLU)

    540
    0
    May 4, 2008
    The Delta
    Wasn't it rated at 300hp at the flywheel from GM?
     
  7. Smokin LB7

    Smokin LB7 Just Takin' it From a Dig

    34
    0
    May 13, 2008
    Greeley, CO
    ON EDIT
     
  8. Smokin LB7

    Smokin LB7 Just Takin' it From a Dig

    34
    0
    May 13, 2008
    Greeley, CO
    Answer thanks ZF6 MAN
     
  9. richard cheese

    richard cheese the MAIN muff hugga

    345
    0
    May 7, 2008
    Q: how can I increase my boost pressure in my LB7?

    A: PPE boost valve/ PPE/Kennedy boost control.....or anything that restricts the flow of pressure from the turbo to the wastegate
     
  10. Smokin LB7

    Smokin LB7 Just Takin' it From a Dig

    34
    0
    May 13, 2008
    Greeley, CO
    Dont forget a Bank Big Head
     
  11. Gruber

    Gruber Tin Can Rider

    504
    0
    May 4, 2008
    1000 Oaks, California

    Then there is always the JuiceGripstm if you are on a budget:hand:
     
  12. jcool

    jcool #78 A(ACLU) FNG

    1,097
    0
    May 4, 2008
    Richlands, NC
    exhaust and a lowpower programmer(stock tranny safe) and a light right foot keeping speeds around 60-65 on the highway seems to be the best mileage I have seen
     
  13. The Killing Road

    The Killing Road Banned

    597
    0
    May 10, 2008
    MS
    Q.Why LB7s so awesome?

    A. They just Rock!!!
     
  14. Pipepro

    Pipepro McMuddy

    58
    0
    May 10, 2008
    MI
    Q: I hear what sounds to be air blowing with the engine running, poor power, kinda sluggish, my boost gauge is reading low whats the deal?

    A: Look at the intercooler tube on the Drivers side for a small hole where it is rubbing on the power steering line. Weld, Epoxy or other patch, protect repair with hose or adjust clamps to take up slack, should be good to go.
     
  15. WanaDmxSub

    WanaDmxSub Recruit W/gray hair

    89
    0
    May 8, 2008
    You can have good balance rates and bad injectors.
    Bad balance rates will not get your injectors replaced under the special policy...but it does happen.
    Yes, you can remove the Cat with out setting a code.
    Plugging the EGR will set a code.
    Yes, there are LB7's with Cat's and EGR's!
     
  16. DunesRunner08

    DunesRunner08 Banned

    1,417
    0
    May 7, 2008
    Phoenix, AZ
    so is the LB7 or the LBZ a better motor...in all honesty?
     
  17. jcool

    jcool #78 A(ACLU) FNG

    1,097
    0
    May 4, 2008
    Richlands, NC

    LB7, great mileage but it does have a few downsides... but every motor is different
     
  18. richard cheese

    richard cheese the MAIN muff hugga

    345
    0
    May 7, 2008
    Q: what is considered to be the norm for injector balance rates?

    A::toetap05:
     
  19. stacks04

    stacks04 McLovin

    3,579
    0
    May 9, 2008
    terryville ct
    +/- 4 in park and +/- 6 in drive
     
  20. Heartbeat Hauler

    Heartbeat Hauler A(ACLU) Agent Yoda

    2,079
    1
    May 4, 2008
    Morgantown, WV
    Actually 2001 - 2004.5 is correct for the LB7 run, the LLY showed up mid-year '04
     

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