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Thread: Nissan 810 Fuel pump attachment,What is it ??

  1. #1
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    Nissan 810 Fuel pump attachment,What is it ??

    Hello: Can any one help me identify

    What is attached to the fuel pump outlet of Beck Arnley 152-0765, Nissan# 17010 fuel pump used in 1980 -'84 Nissan 810, Maxima ????

    Is it a Check Valve ??or Pressure Regulator?? or damper??

    Seems same pump, without this attachment, is used in early 280Z with D-jet.

    I'm trying to find an alternative fuel pump for my D-jet Mercedes.

    The FI fuel Pumps used by early Datsun/Nissan has similar construction, and specs as OEM Bosch Mercedes fuel pumps.
    OEM Nissan fuel pump were made by JECS, Japan...I think under Bosch.

    Please see this attachment to the 1980 810 at Nissan Parts Zone

    nissanpartszone.... Search on PN 011-W3015, or 011-W3016. The search should take you to the diagram

    I can't post links because it is my first post.


    Appreciate your help.

    Regards,

  2. #2
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    Re: Nissan 810 Fuel pump attachment,What is it ??

    Quote Originally Posted by scia63
    Hello: Can any one help me identify

    What is attached to the fuel pump outlet of Beck Arnley 152-0765, Nissan# 17010 fuel pump used in 1980 -'84 Nissan 810, Maxima ????

    Is it a Check Valve ??or Pressure Regulator?? or damper??
    Pulse damper. :tu:

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    Re: Nissan 810 Fuel pump attachment,What is it ??

    Quote Originally Posted by datsunfreak
    Quote Originally Posted by scia63
    Hello: Can any one help me identify

    What is attached to the fuel pump outlet of Beck Arnley 152-0765, Nissan# 17010 fuel pump used in 1980 -'84 Nissan 810, Maxima ????

    Is it a Check Valve ??or Pressure Regulator?? or damper??
    Pulse damper. :tu:
    Thanks datsunfreak....you I think made my day!
    Others have told me it is a check Valve.

    In addition to the fuel pulse damper, Do you know if this fuel pump has an internal Check valve to keep the FI lines pressurized ???

    Greatly appreciate your help

  4. #4
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    Re: Nissan 810 Fuel pump attachment,What is it ??

    Quote Originally Posted by scia63
    In addition to the fuel pulse damper, Do you know if this fuel pump has an internal Check valve to keep the FI lines pressurized ???
    To the best of my knowledge, no. Doesn't sound terribly necessary either.

    I wouldn't want them constantly pressurized when the car is off. :wink:

    The pump itself and the fuel pressure regulator (on the end of the fuel rail) keeps it pressurized while it's running. :tu:

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    I think itís a check valve. On the below Maxima fiche diagram of the fuel pump item 22675 is the damper and it attaches to the fuel pump with a short piece of hose. Nissan used a check valve on all the 280ZXís and earlier 810ís, so I would expect the Maximaís (or the 910ís) to continue with this function.

    You want to maintain pressure in the fuel rail even if the engine is off to prevent vapor lock (fuel boiling) due to heat soak. Pressurized liquids require much higher temperatures to vaporize. Yet another reason why FI is better than carbs.

    The Maxima check valve is different in appearance than the earlier check valves. Perhaps a re-design as the earlier valves were not that reliable.


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    [quote="zcarnut"]I think itís a check valve.

    Steve, Yes you have the correct pump diagram, Thanks

    When I apply a vacuum to the thingy it holds the vacuum. A check valve would not hold a vacuum in the direction of flow.

    If it is a check valve then you would expect the flow from inlet, through the pump and out the outlet would go unhindered. You would not be able to maintain a vacuum if the inlet was open.

    But the thing holds a vacuum.

    So, I'm still not sure WTF it really is, but I'm inclined to think it is a fuel pulse damper like datsunfreak said in the previous posting.

    But how can I be 100% sure. I've search the internet hard and I have not yet seen an example or know for sure.

  7. #7
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    its a damper i have the same thing in my 810 .. i have removed the damper befor from the car to see how it would flow and its all pulsy with out the damper.. even so no need to crack your brain over it it can also be a damper / check valve .. but if your pump goes out dont wory and just get a universel external pump and hook up the damper if you wish its all good eathier way..

    also my 77 810 always has some presser in the lines when the car is off.. (ive had fule spray in my face/eyes .. lol )

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    Quote Originally Posted by arsonist63086
    its a damper i have the same thing in my 810 .. i have removed the damper befor from the car to see how it would flow and its all pulsy with out the damper.. even so no need to crack your brain over it it can also be a damper / check valve .. but if your pump goes out dont wory and just get a universel external pump and hook up the damper if you wish its all good eathier way..

    also my 77 810 always has some presser in the lines when the car is off.. (ive had fule spray in my face/eyes .. lol )
    Hey Fabian, Went to your 810 site......NICE!

    Hey do all the members of this form live in CA ??

    Thanks for the info.
    What do you mean when you say "it was pulsy without the damper". How could you tell?? Can you describe what pulsation you observed. Was it Bad ??
    According to the fuel pump diagram above the 810 also has a fuel damper: PN 22675,attached to the fuel line. This fuel damper, I would think would absorb most if not all the fuel pump pulsation.

    Hey Fabian, Except for the games you and me have the same interest, cars, food, and women....what else is there.

    My car has an inline fuel pressure reg. and a fuel damper, so, I thinking that I do not need the Pulse Damper attached to the fuel pump.

    The Fuel pump is going into "maybe" a "72 FI Mercedes. It has all the specs I need: pressure and flow, but the Pulse Damper and its operation is what I need to understand. Once I got some good understanding of the PD then I will decide if it is worth keeping or removing it from the fuel pump before installation.

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    Itís a damper and a check valve. Since the Maxima has another damper downstream it has two dampers in series.

    Hereís a pic from the 1983 Maxima FSM:



  10. #10
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    [quote="zcarnut"]Itís a damper and a check valve. Since the Maxima has another damper downstream it has two dampers in series.

    Hereís a pic from the 1983 Maxima FSM:


    Steve: Can you give me the source of your picture ??

    Isn't great when small things really make you happy!

    Thank you very much! Your's is the info. I have been unable to find and been waiting for. Much appreciated !

    It seems to me that the design of this fuel pump with the pulsation damper/check vale in one is an upgrade to my original OEM Bosch fuel pump I'm trying to replace. The OEM pump only has a straight check valve, the same as on the early FI 280Zs.

    The upgrade :The PD for smooth consistent fuel pressure without pulsation and check valve to keep the lines pressurized.

    Sooo, it seems also to me, being of better design, the fuel pump should be installed as is: with the PD/check valve in place.

    So what's your opinion ?

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