So why would they have a seal there at all, I understand what your saying but if you read all the posts in the help section of the forum apparently it does. I had a split one on my savage and although it didn't cure it fully it made a difference. How old is the car it could also be the fuel tank, fuel tank and carb are my obviously causes there's a way of checking the tank by blowing through one of the tubes but can't remember which one i think you blow down the line which goes to the exhaust and pinch the other line to the carb don't blow to hard and see if the pressure escapes from the tank if so that's your problem