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Thread: Fuel Line Routing

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  1. #1
    Yoda dklawson's Avatar
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    Fuel Line Routing

    I think that every Triumph I have seen runs a fuel line around the front of the engine up at the level of the T-stat housing then drops down to the carbs. Why not run the line lower where it wraps around the front of the block? I am assuming that with the old TRs having the big belts there is the possibility of the belt or a pulley hitting the fuel line but with the 1/2" belts there should be plenty of room shouldn't there?


    Why is this of concern to me? The fuel line is obviously full when the engine is running. When the engine stops the fuel in the line isn't going to stay there, it's going to drip down into the float bowls. In the case of our GT6, I have an inline filter just before the carbs. The fuel from the line and the filter is draining down and overfilling the float bowls when the engine stops. That fuel is dripping onto the frame. It's also likely to be the reason I found fuel pooled in the intake manifold when I removed the carbs this past weekend.


    Have you or anyone you know modified the fuel line routing so it is always going "up" instead of down?
    Doug L.
    '64 Morris Mini Cooper-S 1275
    '67 Triumph GT6 Mk1

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    Luke Skywalker trrdster2000's Avatar
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    Re: Fuel Line Routing

    Doug, I have a cut off about where the old pump was located on the new Spit6. Had the diaphragm go bad on the TR6 and the Roadster, my cars do tend to set for long periods of time. The TR6 has one where you have a filter and the Roadster before the pump.
    The later Spitfires ran down the firewall and I thought about that.

    You might be interested in the idea I have about a brake flex hose to the clutch slave instead of the curly pipe. Uses on of the rear brake solid lines off the clutch master and a bracket off the fire wall for the flex hose. Still figuring on the right angle needed at the slave.
    I know nuts!


    '37 MG TA, '49 Triumph Roadster, '70 TR6, 2000 Jaguar XK8, '78 Spit6

  3. #3
    Great Pumpkin TR3driver's Avatar
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    Re: Fuel Line Routing

    No, but I have replaced leaky float valves.
    Randall
    56 TR3 TS13571L once and future daily driver
    71 Stag LE1473L waiting engine rebuild
    71-72-73 Stag LE2013LBW waiting OD gearbox rebuild

  4. #4
    Yoda dklawson's Avatar
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    Re: Fuel Line Routing

    Quote Originally Posted by TR3driver View Post
    No, but I have replaced leaky float valves.
    Our car has brand new float valves from Joe Curto. I suppose I can take them out and clean them but they should be clean.
    Doug L.
    '64 Morris Mini Cooper-S 1275
    '67 Triumph GT6 Mk1

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    Yoda CJD's Avatar
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    Re: Fuel Line Routing

    Quote Originally Posted by dklawson View Post
    Our car has brand new float valves from Joe Curto. I suppose I can take them out and clean them but they should be clean.
    +1. Just because they are new does mean they don’t leak. They could have been damaged during shipping.

    There are too many moving, spinning things lower to run the line lower. There is only about 1/2” gap between the crank and water pump pulleys, and then it must route up and through the belt to the alternator. It is not worth the safety risk trying to find a route lower. If you insist on lower, then the rear of the block may be a better choice.

    But...fix you float valves and higher will not be an issue.
    John

    1955 TR2

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