Paul in Colorado
Senior Member
My Town Sedan has run fine using the gas cap which came with it until recently. I know the cap has been on it at least since 1968, so I believe it is an original. The gasket was badly deteriorated, so I replaced it recently. The cap then did not vent. I made sure the gasket did not block the small hole near the rim, and had clearance around the center part with the lugs. It still did not vent. I soaked it in carburetor cleaner, with no improvement. As the picture (my first attempt) may show, it has a vent hole near the rim, but no hole in the center. Because of the vent hole, I have assumed that it is not a radiator cap, but I see no way for the center to vent. Is it really a radiator cap, or is there another problem?