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Dual tank switching valve

Discussion in 'Early CJ5 and CJ6 Tech' started by colojeepguy, Jan 21, 2012.

  1. Jan 21, 2012
    colojeepguy

    colojeepguy Colorado Springs

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    I have 2 tanks in my '70 CJ5. I'd like to find a switching valve that is mechanical and 6 ports so I can still utilize the return fuel line. This one is exactly what I want-
    http://www.groco.net/
    but the cheapest I can find it is ONEHUNDREDANDFIFTYDOLLARS-ouch!!
    Anybody know of a cheaper alternative that's 6 ports & mechanical not electric?
     
  2. Jan 21, 2012
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    I've looked too, and the only one I know of is targeted at boats, the GROCO, FV65038, Fuel Valve 6 Port - cheapest $168. The ACDelco U7001 Fuel Selector Valve for ca $70 is the usual choice I think - that's what my J20 has to switch to its aux tank. Electric control also gives you the opportunity to switch the gauge and fuel flow with a single toggle.

    You know what they say about boat stuff ... "A boat is a hole in the water that you throw money into." ... "You can get the feeling of boating by standing in a cold shower in your raincoat and tearing up $100 bills." ... etc.
     
    Last edited: Jan 21, 2012
  3. Jan 21, 2012
    colojeepguy

    colojeepguy Colorado Springs

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    Yep-Bust Out Another Thou$and!
    I'm sure if there was a non marine version of that valve, it would be a more reasonable price......
     
  4. Jan 21, 2012
    ArnoldV

    ArnoldV New Member

    La Verne CA
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    [TABLE="width: 96%"]
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    I ran several dual tanks set ups on VW & MBZ Diesel. Run a return line to the higher tank (A) with a tee. Then run from the tee to the return on tank (B) thus the diesel return was shared by both tanks. Needing only a simple 20 dollar valve. Never had a problem did several but never tried it on a Jeep set up. Not sure why it wouldn't work.
     
  5. Jan 21, 2012
    Mjragan

    Mjragan Member

    socal-Simi Valley
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    The BWD fsv3 is a 6 port electric unit that goes for around $63.
     
  6. Jan 21, 2012
    colojeepguy

    colojeepguy Colorado Springs

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    I'm currently running a manual 3-way valve like the one pictured above, with a tee in the return. It works fine, but there seems to be no rhyme or reason as to where the return flow goes to-I've actually overflowed the front tank while running on the rear.
     
  7. Jan 21, 2012
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    I thought the reason for running a return to tank was so you can run a sealed tank? Guess this is not the case as you shouldn't be able to overfill.
     
  8. Jan 21, 2012
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    AFAIK it's about preventing vapor lock. Recirculating the fuel keeps the fuel in the lines cool.
     
  9. Jan 21, 2012
    ArnoldV

    ArnoldV New Member

    La Verne CA
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    The tanks should avoid leak & limit evaporative emissions almost air tight so it should flow to the other tank? Bad cap? Do have a charcoal canister? Is the Tee set up near the return on the rear tank then flow forward from there? If on the front tank or center might not work as well as it should. If both tanks are topped off on a hot day there would be no room for expansion.
    If nothing else then Well a second $20 valves will do the trick to direct the return flow.
     
  10. Jan 22, 2012
    Gixx

    Gixx Member

    Albuquerque, NM
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    Salvage yard. I got mine out of a Ford truck, I think. Anything with dual tanks - stock. My 1980 Chevy 1/2 ton with the saddle tanks has one too. Its an electric valve with supply and return lines to go to each tank. The U-Pull-It charged me $15.
     
  11. Jan 22, 2012
    MitsJ54

    MitsJ54 New Member

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    If your auxillary tank is smaller than your primary tank, a single line using a transfer pump to move fuel from the aux tank to the main tank solves a lot of problems and is a much simpler install. The advantage is you get to use all the fuel from the aux tank rather than switching over early leaving much behind because you are concerned about the engine stopping from fuel exhaustion. I have a protected switch on my dash. When the fuel level reaches a low point on my main tank, I flip the switch and transfer the entire contents of the aux tank into the primary tank. There are methods to protect against overfilling the main tank, but because my aux is smaller than the main, it has not been an issue.
     
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