Topic: Gas smell with full tank
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
Already a Member?
Click Here to Login
Not yet a Member?
Click Here to Register for Free!
I had the same problem on my 74. I replaced the fuel cap which was bad, but the main cause was the over flow hose which was cracked at the top by the fill spout. It never leaked enough fuel to leave any sign of a leak, but it did emit a strong gas smell. Fixed the hose, no more gas smell,
SPONSOR AD:: (Our Sponsors help support C3VR)
Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
The filler neck on the later cars(77-82) were sealed by the "Bladder". It formed the seal for the neck, as well as being the bag for the fuel tank. If it is leaking at the filler neck/tank junction, chances are the bladder itself is bad. 
The good news is, you can completely remove the bladder, and seal the neck with a cork gasket, like the older tanks were. 
This is a pretty old thread!! That "search" function is purty neat, eh Adam??
The good news is, you can completely remove the bladder, and seal the neck with a cork gasket, like the older tanks were.
This is a pretty old thread!! That "search" function is purty neat, eh Adam??
Joel Adams
C3VR Lifetime Member #56 
My Link 
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
If you are going to replace the cap, consider a locking cap. With the price of gas always going up, I wanted to make it more difficult for the gas robbers. 
Save the Wave!
Support the National Corvette Museum
Support the National Corvette Museum
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
SPONSOR AD: (Our Sponsors help support C3VR)