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Rear section of Robin hood fuel cap


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  • 3 weeks later...

I found with mine the tube didnt protrude through the plate enough to make a good seal it touches but doesn't compress. I added a layer of rubber to the cap using 1mm nitrile rubber cut to fit and glued on. I would have adjusted the flange if the car wasn't built. I dont think the flange has anything to do with sealing, the seal on the cap is spring loaded and seals on the tube end. I'm not sure how accurately these parts are made so you may need to test first and decide if the flange needs to be adjusted.

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Jez is correct,my memory fade on the flange plate seal, & as he said the tube doesn't seal well to the cap rubber.  Also I believe that a tab needs welding/forming inside the tube for the cap catch to engage with. Memory recalls that I cut the tube through at correct depth, hammered tube in to form a lip & then welded the cut closed -- was the only way I could figure to get a sharp/square lip on the inside of the tube.

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