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cork floats on gas sending unit----fix ????

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  • cork floats on gas sending unit----fix ????

    I have the sending unit removed from a gas tank in a '52 Commander and it has two cork floats. One is shedding which will mean a plugged lind later. What is the fix ??? Thanks....Brad

  • #2
    Brad, I don't know the fix, but just got a NOS sending unit from Dan Peterson and I can tell you that it looks like just ordinary cork round plugs about 3/4 inch in dia. (two of them). However, they are covered with some type of sealer, almost looks like clear coat, but I am sure it's not that. The unit I got from Dan was for a 51 Champion, but am sure it fits several tanks applications. This one is the zero to one hundred ohm one.

    Regards,
    Jerry

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    • #3
      wine corks are 3/4 in diameter :-)
      64 GT Hawk (K7)
      1970 Avanti (R3)

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      • #4
        My local hardware stock corks, but you'd need to seal them with some sort of fuel proof sealer. Most restorers dip the cork float in a can of shellac to seal it.


        JDP
        Arnold Md.
        Studebaker On The Net
        http://stude.com
        My Ebay Items
        http://www.stude.com/EBAY/

        64 GT hawk
        63 R2 4 speed GT Hawk (Black)
        63 R2 4 speed GT Hawk (Black) #2
        63 Avanti R1
        63 Daytona convert
        63 Lark 2 door
        63 Lark 2 door #2
        62 Lark 2 door
        60 Hawk
        59 3E truck
        52 Starliner
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        JDP Maryland

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        • #5
          JDP gave you the biggest clue. I've read that the original corks were coated with shellac to keep them impervious and "floatable".

          However, if any of you is a woodworker, you may know what solvent is used to cut shellac. Unfortunately, it's a solvent that is now found in much gasoline - ALCOHOL.

          So, coating corks with shellac is no longer a good idea. What I did, when I was thinking of re-using my old sending unit was to order some gas tank sealant from POR-15. I thought I would need it in my tank, and I also used it to coat the original cork. It "test-floated" very well in water, so that POR-15 or some other brand of gas tank inner sealant paint/coating might be the answer.

          [img=left]http://rocketdillo.com/studebaker/misc/images/Avacar-hcsdc.gif[/img=left]DilloCrafter

          1955 1/2 Ton Pickup
          The Red-Headed Amazon
          Deep in the heart of Texas

          Paul Simpson
          "DilloCrafter"

          1955 1/2 Ton Pickup
          The Red-Headed Amazon
          Deep in the heart of Texas

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          • #6
            What about that "plastic dip" you can buy for coating tool handles? That might work.
            Todd


            63 Lark 2dr Sedan
            64 Daytona 4dr Sedan

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            • #7
              I did a search on this site "cork float" and came up with Por-15 because the new fuels cut shellac....It seems brass or plastic might be better and there was reference to Summit for sending units..Brad

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              • #8
                Brad, I went out to the shop and measured the corks on the NOS sending unit I just purchased (525548). I don't have a parts manual for you car, so you will need to check and see if it uses this sender. The cork material is 1 1/4 inch in dia. and 1 1/2 inch long (two required). As was mentioned before it looks like these are currently covered with shellac. Now I am wondering if I need to cover them with some other type of sealer[?][?] Oh no another thing to worry about

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                • #9
                  Yep, Jerry. Most shellac sold comes as flakes, to which you add alcohol to dissolve it into a usable liquid form. It may not be long before all gasoline has at least some alcohol in it.

                  Brad, if you go the Summit route, you'll have to see if they have the kind of sending unit for the older, 6v vehicles. Yours will have a 0-100 ohm range, whereas their replacement 12v unit (and all 12v units used on Studebakers) have a 240-33 ohm range, going in the opposite direction from the 6v cars.

                  [img=left]http://rocketdillo.com/studebaker/misc/images/Avacar-hcsdc.gif[/img=left]DilloCrafter

                  1955 1/2 Ton Pickup
                  The Red-Headed Amazon
                  Deep in the heart of Texas

                  Paul Simpson
                  "DilloCrafter"

                  1955 1/2 Ton Pickup
                  The Red-Headed Amazon
                  Deep in the heart of Texas

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                  • #10
                    You know where those shellac flakes come from? The lac bug no less. They produce them on their gross little bodies. Reminds too much of a cockroach and I hate bugs!

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                    • #11
                      quote:Originally posted by DilloCrafter

                      JDP gave you the biggest clue. I've read that the original corks were coated with shellac to keep them impervious and "floatable".

                      However, if any of you is a woodworker, you may know what solvent is used to cut shellac. Unfortunately, it's a solvent that is now found in much gasoline - ALCOHOL.

                      So, coating corks with shellac is no longer a good idea. What I did, when I was thinking of re-using my old sending unit was to order some gas tank sealant from POR-15. I thought I would need it in my tank, and I also used it to coat the original cork. It "test-floated" very well in water, so that POR-15 or some other brand of gas tank inner sealant paint/coating might be the answer.

                      [img=left]http://rocketdillo.com/studebaker/misc/images/Avacar-hcsdc.gif[/img=left]DilloCrafter

                      1955 1/2 Ton Pickup
                      The Red-Headed Amazon
                      Deep in the heart of Texas
                      DilloCrafter, You are right on the money with your suggestion. I gave my tank to my POR15 Distributor here in town, (He restores gas tanks for folks) and he used the POR15 gas tank sealant in the tank and on the cork for the sending unit. Prior to Gary Chrissman getting the tank I had it Chemically dipped to get out all of that gunk in the tank, by Chemstrip of Burlington, N.C. It now looks like a brand new tank, but it is 57 years old

                      Don Dodson

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                      • #12
                        What about using JB Weld on the outside of the cork??
                        I have used that stuff to repair leaks on old gas tanks when I was in college. it lasted for the two years i owned the car??

                        28 dictator
                        40 commander
                        28 dictator
                        40 commander

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                        • #13
                          So far I have learned that JC Whitney and Summit have senders that will work. NAPA has fuel tank sealer for about $20 per quart--QUART NOT PINT, for the cork. I bought 2 corks at the local hardware store for $1.74. A friend of mine has redone three Studes. and uses the JC sending units. If my sending unit does not work I'll order a new one......Brad

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                          • #14
                            Go to your local junk yard, get a sender from a late model car or truck that has the new "hi-tech" plastic/foam floats....they're impervious to any fuel you'd be puttin' in your tank.
                            Dan Miller
                            Atlanta, GA

                            [img=left]http://static.flickr.com/57/228744729_7aff5f0118_m.jpg[/img=left]
                            Road Racers turn left AND right.

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                            • #15
                              Playing around with a cork float and the attendant issues seems futile. Get a modern brass or impermeable gas tank float and use that kind. Google or eBay: gas tank float for examples and sources. FYI.


                              Henry Votel
                              North Star Wheel
                              North Star Chapter SDC
                              www.northstarwheel.com
                              Henry Votel,
                              Forest Lake, MN
                              Buying & Selling Studebaker Parts in MN & WI

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