My '71 Swinger's old fuel tank was rusted and leaking so I bought a new tank, which is made by Spectra. I also got a new tank grommet from Classic Industries. The tank fit the car fine, even clearing the dual exhaust nicely, but when I attempted to install the filler tube it was a no-go. After much struggling with no success I removed the new tank and tried to install the filler tube with the tank on the ground just to see if I could make it fit with more leverage. Still a no-go. I used silicone grease on the seal, heat and still it will not slip through the grommet. The grommet fits the tank opening fine and it is fully seated.
I measured the tank opening and it is 2 1/4 inches. My filler tube is 2 inches outside diameter while the grommet inside diameter is 1 15/16 inches. I thought the rubber grommet might have enough give even though it is slightly smaller than the filler tube. Do you think the problem is the grommet being to narrow, or is my tank opening not large enough? Thanks for any comments or help.