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detroit diesel 8v92 questions

Discussion in 'Peterbilt Forum' started by flc120, Oct 13, 2015.

Page 6 of 16
  1. Oct 17, 2015 #51
    mountaingote

    mountaingote Road Train Member

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    I suppose you've seen the truck in question? I'm glad you like working on the biggest POS motor ever made. Saves somebody else the trouble
     
    mountaingote, Oct 17, 2015
    mountaingote, Oct 17, 2015
    #51
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  3. Oct 17, 2015 #52
    goin2fast10

    goin2fast10 Light Load Member

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    I don't work on them...make a note.
    "I spent most of my adult life working with them." I'll be 68 in Dec. I spent nearly 30 years in different capacities with engines, Detroits mainly.
    Detroits DON'T HAVE compression releases.
     
    goin2fast10, Oct 17, 2015
    goin2fast10, Oct 17, 2015
    #52
    Bean Jr., truckdad and 201 Thank this.
  4. Oct 17, 2015 #53
    flc120

    flc120 Heavy Load Member

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    Setup only has one filter.... it does not have two. It looks as if the feeed and return both go up to the top front of engine from the tank directly. Looks to have the filter that is on it after the pump instead of before it
     
    flc120, Oct 17, 2015
    flc120, Oct 17, 2015
    #53
  5. Oct 17, 2015 #54
    flc120

    flc120 Heavy Load Member

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    So do i crack loose that filter and pressurize it thru the vent until fuel comes out if top of filter?? Then close it up and try to start it while still presssurizing thru the vent? Let say it does have air in line after it starts is it like the old ntc cummins were it will clear itself up byitself?
     
    flc120, Oct 17, 2015
    flc120, Oct 17, 2015
    #54
  7. Oct 17, 2015 #55
    goin2fast10

    goin2fast10 Light Load Member

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    It doesn't have a primary filter? Not good. Primary is a "sock" style to remove water.
    Crack fitting on discharge side of filter while running. Just crack it ever so slightly and the faster the engine turns the more fuel will "spray" (getting all over everything everywhere).... it will run really rough until most of the air is gone, then tighten the line. It will still be running rough until ALL the air is gone. It will take what seems like a long time but without a hand priming pump I don't know of any other way than pressurizing the tanks. No matter which method is used it will run rough and have to be kept running until it clears itself...
     
    goin2fast10, Oct 17, 2015
    goin2fast10, Oct 17, 2015
    #55
    MACK E-6 Thanks this.
  8. Oct 17, 2015 #56
    Bean Jr.

    Bean Jr. Road Train Member

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    Cummins had compression release, not Jimmies. That knob vents the boost from the blower, so it has no oxygen for combustion.
     
    Bean Jr., Oct 17, 2015
    Bean Jr., Oct 17, 2015
    #56
  9. Oct 17, 2015 #57
    flc120

    flc120 Heavy Load Member

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    You mean crack fitting on the filter head itself? I noticed the filter head had like two outs and i think one in?

    When you say while running? You mean while its running with the ether, ???
     
    flc120, Oct 17, 2015
    flc120, Oct 17, 2015
    #57
  10. Oct 17, 2015 #58
    goin2fast10

    goin2fast10 Light Load Member

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    One step at a time.
    Pressurize tank.
    Crack line at pump. When you get fuel there tighten it.
    Crack line at filter inlet. When you get fuel there tighten it.
    Crack line at filter outlet. When you get fuel there tighten it.
    Start cranking engine over keeping pressure on tank until engine will run.
    None of the steps are instantaneous. Each step takes a little time.
    You don't need a lot of pressure at the tank so much as constant pressure.
    Continuing to use ether is going to hurt the engine. All that knocking you hear is real.
     
    goin2fast10, Oct 17, 2015
    goin2fast10, Oct 17, 2015
    #58
    truckdad, flc120 and MACK E-6 Thank this.
  11. Oct 17, 2015 #59
    goin2fast10

    goin2fast10 Light Load Member

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    This is a hand priming pump
    http://www.ebay.com/sch/sis.html?_nkw=5110760+NEW+DETROIT+DIESEL+HAND+PRIMING+FUEL+PUMP
    It's the easiest method there is. Have a line in your supply and a line to the filter inlet and start pumping. Pump until it gets kinda hard and then start cranking the engine. Keep pumping til it'll run.
    Ebay isn't the only source I just used it to show you a picture and approximate cost.
     
    goin2fast10, Oct 17, 2015
    goin2fast10, Oct 17, 2015
    #59
    flc120, 25(2)+2 and MACK E-6 Thank this.
  12. Oct 17, 2015 #60
    MACK E-6

    MACK E-6 Moderator Staff Member

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    Thank you for your insight here. I found it interesting reading.:)
     
    MACK E-6, Oct 17, 2015
    MACK E-6, Oct 17, 2015
    #60
    Fratsit and goin2fast10 Thank this.
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