Gas tank sending unit

Discussion in 'General Maverick/Comet' started by Gene Fiore, Nov 19, 2011.

  1. Gene Fiore

    Gene Fiore Member

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    I want to remove and inspect the sending unit from my tank. Once I drain the fuel, what is the technique for removing the locking ring? I don't want to break anything.
     
  2. maverick1970

    maverick1970 MCG State Rep

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    They make a tool for it. But a brass punch and a hammer will do the job. Just needs to rotate a small amount.
     
  3. Moneymaker 1

    Moneymaker 1 Green Street Beasts

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    Yes use brass...it won't cause a spark.
     
  4. Gene Fiore

    Gene Fiore Member

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    Just about all the fuel that is going to drip out is out...how much more fuel can I expect to pour out when I loosen the locking ring?
     
  5. mulberrycop

    mulberrycop Member

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    Depends on how much gas is in the tank. If I remember, the unit is near the top of the tank.
     
  6. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

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    If you have drained all the gas...should be able to remove it with no leaks. Maybe jack up that side of the car, tilting the tank, when you remove it
     
  7. Gene Fiore

    Gene Fiore Member

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    Ok...so I got the locking ring off but how do I remove the sending unit assembly?? Do you have to push in on it to loosen or what?
     
  8. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

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    Once the ring is removed...it pulls right out. Might be a little stuck. A little persuasion with a flat screwdriver should do the trick.
     
  9. Gene Fiore

    Gene Fiore Member

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    Thanks Craig...that did it! The reason I am doing this is I am chasing a low fuel pressure concern. I am running an oem mechanical carter pump with a new fuel filter. Pressure is barely 4lbs at idle and barely 3lbs under load. I suspected maybe the filter inside the tank was dirty. So now for more questions:

    1) Is the filter over the sending unit supposed to be black? The filter fell apart at its' seam when I touched it.

    2) Is Autokrafters the only place I can get a new one?

    3) What should I do about the o-ring at the opening? It's really in there and wonder if I should just leave it or pry it out and get a new one?

    4) Anything I should do with the sending unit before I re-install it?

    Thanks for the help guys! :thumbs2:
     
  10. maverick1970

    maverick1970 MCG State Rep

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    The filters are the same on the Ford sending units of the era. Difference being if it is a 5/16 or 3/8 tube. If your gas gauge worked fine then nothing more to do. Go ahead and get a new gasket, they are cheap.
     
  11. rthomas771

    rthomas771 Member

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    1.) Factory is black...replacements are white
    2.) No...any Mustang shop should have them
    3.) Get a new one
    4.) I never been able to install the sender with the tank in the car without it leaking. Take the tank out and stand the tank on its end so you can get to it easier. A thin coat of axle grease on the gasket will keep the gasket from sliding around. Make sure to clock the sending unit or the gauge won't read correctly
     
  12. Gene Fiore

    Gene Fiore Member

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    What does this mean? :huh:
     
  13. rthomas771

    rthomas771 Member

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    Have the sender squire with the tank. I you have it cocked before or after 12 O'clock then it won't read correct. If it’s upside down it will read empty with a full tank and full with a empty tank
     
  14. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

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    Sender should have tabs on it so it only goes in one way. It is "self-clocking". :D
     
  15. Gene Fiore

    Gene Fiore Member

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    Ok, that's what I thought....whew!
     

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