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Thread: Fuel tank connections

  1. #1

    Fuel tank connections

    I have a MY1972 911 S that i am rebuilding/restoring. When delivered it had no fuel tank and no fuel lines.

    Reading the instruction manual and the parts manual, it is quite difficult to identify the connections i need to re-establish.

    Starting with the tank. I have bought a Dansk replica given mine was missing. It has 3 connection holes on the bottom. As you look at them, i believe the first connection on the left is the fuel supply to the pump. The middle connection is the fuel return from the pump and the fuel console and the third connection is not used.

    Questions:
    1. What size is the fuel supply fitting for a 2.4 S? I have a small (6mm) and a large (8mm) version
    2. The 3rd hole in the tank bottom is presumably closed off with a blanking plug?
    3. I have 2 pipes that terminate close to the master cylinder outside of the car. I believe these are the fuel supply and return hard lines that go through the tunnel. i also have 2 similar pipe ends that emerge vertically from the tunnel inside the car very close to the front bulkhead and i have no clue what these pipes do and i cant see into the tunnel to see where they go.

    Shot to identify where the pipes are



    Close up of the pipe ends which are covered in black tape to prevent crap getting in



    4. Inside the fuel tank well at the rear are 2 holes which go through the bulkhead immediately behind the pedals. The are close to the hole through which the starter cable goes in order to feed through the tunnel, and just above the front anti roll bar which you can see in the photo. It is almost like these holes should provide a connectivity route for the 2 pipes above to be connected to something. I have no idea what it is though.

    Any idea what these are for?

    I am wondering if (3) and 4) have something to do with the charcoal canister given this was a US spec car when new. I am not, however, refitting the charcoal canister so wonder if these holes and the 2 pipes inside the car are in fact redundant and can be simply closed off.

    Thanks

    Andrew

  2. #2
    They are for the cannister.
    Early S Registry member #90
    R Gruppe member #138
    Fort Worth Tx.

  3. #3
    thanks Ed, i shall use blanking plugs for the holes and ignore the pipes.
    Last edited by Dougieboy1; 04-22-2019 at 06:07 AM.

  4. #4
    just as a matter of interest, where is the other end of the charcoal canister pipes?

    Also, anyone haqve a view on which side fuel fitting for a 2.4 s screwing on the tank? The parts manual suggests both 6 and 8mm which cant be correct?

  5. #5
    Senior Member ejboyd5's Avatar
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    If you're going to do any amount of work with flexible lines, go to Harbor Freight and for less than $15 get these:
    Attached Images Attached Images  

  6. #6
    Quote Originally Posted by Dougieboy1 View Post
    just as a matter of interest, where is the other end of the charcoal canister pipes?

    Also, anyone haqve a view on which side fuel fitting for a 2.4 s screwing on the tank? The parts manual suggests both 6 and 8mm which cant be correct?
    The charcoal tubes exit the rear bulkhead just above the throttle and clutch tubes. Pretty sure the 8 mm fitting is the feed for the fuel pump. The right side of tank fitting was for a Webasto if equipped.
    Early S Registry member #90
    R Gruppe member #138
    Fort Worth Tx.

  7. #7
    Senior Member
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    Oct 2014
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    WTB: Charcoal cannister for my 1971 911 T..

    Please PM me with price and condition if yours is for sale.
    Regards
    Fred
    Last edited by friendlyfred; 04-23-2019 at 04:41 PM. Reason: typo correction

  8. #8
    ed, thanks

    fred, canister was missing on my car and as i am in the uk, i dont need it so am deleting the entire system.

  9. #9
    Senior Member
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    For a '72S : fuel supply line to the fuel pump is 9 mm coming from the left , the return line is 8mm going to the center and the right outlet is for a Webasto heater as Ed wrote .

  10. #10
    This is the other end of the canister, it's the fuel recovery and I'm selling it for $150 plus shippingName:  IMG_2041.JPG
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