BuffaloBillPatri Posted October 17, 2009 Share Posted October 17, 2009 With a non-vented gas cap, gas tanks build up pressure when hot & vacuum when fuel is used. Thinking about using 2# residual brake valves, one in each direction. Anyone ever hear of this? BBP Quote Link to comment Share on other sites More sharing options...
kc8oye Posted October 17, 2009 Share Posted October 17, 2009 You would be far better off to just open a vent fitting! take the fuel sender unit out of the tank, and put a capped vent like you would find in an axle pig in there. OR. if you have '72 tank, with the EEC fittings, I put a hose on one of the vent tubes, ran it up to the top of the axle arch, secured it.. and left enough on the end so that it hung facing down (to help keep water adn stuff out) and that solved my problems totally, but now I use a 70 style tank with a vented cap. Quote Link to comment Share on other sites More sharing options...
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