Injector primer

Discussion in 'VP44 Pump' started by Mopar1973Man, Sep 24, 2011.

  1. Mopar1973Man

    Mopar1973Man Senior Member

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    Ram Year:
    1996, 2002
    Engine:
    1996 Dodge 1500 (V8-5.9L) & 2002 Dodge Ram 2500 (5.9L Cummins)
    Ok Gang...

    I figure I would do a bit of show and tell of the Cummins injectors...

    Here is a stock 235 HP injector.
    [​IMG]

    Now take notice to how tiny the fuel spray holes are. (x10 mag)
    [​IMG]

    Now once you disassemble the injector by loosen the collar nut this is what is inside. (Body, adjustment shim, spring, pintle seat, mid-body, pintle, nozzle, collar nut, copper shim)
    [​IMG]

    Now remember you never want to mix and match parts from one injector to another. All these parts are machined for this particular injector.

    Here is the pintle needle and the nozzle of the injector.

    [​IMG]

    The top hole is the fuel hole this hole allows the fuel to reach down under the pintle and using fuel pressure lift the pintle against the heavy spring.
    [​IMG]

    [​IMG]
     
    Last edited: Sep 24, 2011
  2. ramhunter9

    ramhunter9 Supporting Member

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    Do you have a aftermarket one to show the difference in size ... spray holes ?
     
  3. Mopar1973Man

    Mopar1973Man Senior Member

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    Ram Year:
    1996, 2002
    Engine:
    1996 Dodge 1500 (V8-5.9L) & 2002 Dodge Ram 2500 (5.9L Cummins)
    Yes I do but the thing is the human eye can't see the difference... It like looking at a human hair which measures 0.0015-0.0020 inches... That would be the amount of change as you go up. Or maybe the count of holes... Like those stockers are 7 hole.

    I really don't want to have to pull my RV275 back out of the engine...

    Kind of dirty but a older pic of my R275 (Unmagnified) - Yes the tiny holes are there...
    [​IMG]

    Here is a pic of my stock injectors after 180K miles...
    [​IMG]
     
    Last edited: Sep 26, 2011
  4. ramhunter9

    ramhunter9 Supporting Member

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    How you know what a human hair measures is beyond me ...lol
     
  5. Mopar1973Man

    Mopar1973Man Senior Member

    Age:
    47
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    825
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    6
    Joined:
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    Location:
    New Meadows, Idaho
    Ram Year:
    1996, 2002
    Engine:
    1996 Dodge 1500 (V8-5.9L) & 2002 Dodge Ram 2500 (5.9L Cummins)
    Micrometer is sitting on my desk with my digital calipers too...
     

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