Quote:
Originally Posted by koates
Hi there. If the OD of your fuel gauge capillary copper tube is 1/8" (.125") then it is too large and not correct for the application. My original 1934 ford fuel gauge air line is .099" OD. The replacement reproduction copper air lines are approx. .085" OD. You should be using that one. So Im not sure what size air line nut you are trying to fit onto the gauge unit male thread. The air line kit fittings should fit correctly. The original air line tubing was permanently attached (soldered or braised) to the fuel line and supplied as a single part. This air line tube has to be absolutely air tight from the gauge to the tank sender to work correctly and therefore all your line fittings must fit perfectly. No rough jobs, incorrect fittings or sealing tape etc allowed here. Regards. Kevin.
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The OD of the tube is not important, the ID is. G.M.