Having finished the restoration of my '62 C1, including all fuel tank area new parts [vent tube, filler neck hose etc.] I am disappointed that there is still a strong gas smell near the fill door after a drive on a warm day!!Do I just have to live with this? Alan Kingston
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Re: Gasoline smell
If you have a good cap, yes. A common thing on this old cars. It helps NOT to fill the tank too full. The cap is vented and most will leak if you turn hard right. -
Re: Gasoline smell
I too have a new fill hose and vent line. The addition of these two items pretty well solved the fume problem unless the tank is full. I rarely fill the tank over 1/2-3/4. Prior to the new rubber, I had gas fumes almost all the time. Be sure the vent hose is properly routed out through the fill area.Comment
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Re: Gasoline smell
Agree with Wayne and Ed. One other item to check is to make sure the cover over the tank is sealed well and that one uses a NON vented cap.Comment
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Re: Gasoline smell
Alan...
Be sure to take one visit under the car, If your tank is an original, the metal is so thin that you may have a small leak. Places to look are at the ends of the mounting straps. If the leak is small the drips will not be found on the floor, but the smell is there. This I experienced...Comment
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How did cap get vented?
If memory serves, vented caps on straight axle cars disappeared on AIM date 11-15-56 when the tank venting mechanism was moved from the gas cap to the tank itself.
In addition to advice not to overfill the tank ('topping off' is a common practice and it will 'stress' the expansion space + tank venting features), I'd suggest inspecting the bottom of the gas cap. There were several variations from the same manufacturers intended to serve different cars with the geometry of the locking tabs being different. Does your cap lock FIRMLY into place when you twist it home? If not, it could be a correct looking cap that was not intended for Chevy/Corvette filler neck geometry.
Also, bottom side of cap had a brass flex plate that was lined with a fibre gasket. The flex plate served as a deformable tensioning device to press the fibre gasket 'home' against the filler neck flange. If the gasket is deteriorated (or gone altogether), that's another source of sealing failure.Comment
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Re: Gasoline smell
Another source is the nipple and drain hose from the bottom of the fuel filler door cavity (which is almost always missing); there's supposed to be a nipple there with a rubber drain hose that goes straight down through a 1" rubber grommet in a hole in the underbody so any leakage from the cap dribbles out on the road. When this is missing, the dribbles go inside the underbody cavity behind and outboard of the seat instead and make for big-time fuel smells. I'd also get a new non-vented parts-store cap that SEALS, and save the "correct" cap (which usually DON'T seal properly to the filler neck) for judging.Comment
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Re: Gasoline smell
Don't forget that the gaskets now available might have some variability re thickness, fit and overall quality. I had to try several to relieve the gas smell in my C2.Comment
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