vented locking gas cap
Team Owner
Joined: Sep 2006
Posts: 31,270
Likes: 4,362
From: Westminster Maryland
Hi,
The 72 gas tank, fuel supply and return, and gas vapor control system, were all designed to be used with a 'sealed' gas cap.
The affect of a 'vented' cap on those systems depends on if they're operating at this time.
Many people report a gas smell in the garage when a vented cap is used because the gas vapor control system is defeated.
Regards,
Alan
The 72 gas tank, fuel supply and return, and gas vapor control system, were all designed to be used with a 'sealed' gas cap.
The affect of a 'vented' cap on those systems depends on if they're operating at this time.
Many people report a gas smell in the garage when a vented cap is used because the gas vapor control system is defeated.
Regards,
Alan
Race Director
Joined: Sep 1999
Posts: 11,361
Likes: 383
From: Plano TX
I have a vented cap on my '71 and the factory vent is blocked (don't have the charcoal canister).
I don't see any real problem if the charcoal canister is still present and hooked up, as the vented cap only opens when there's a pretty high pressure in the tank. When I remove the cap after driving there's a loud whoosh as air rushes out.
I never have any gas smell in the garage.
I don't see any real problem if the charcoal canister is still present and hooked up, as the vented cap only opens when there's a pretty high pressure in the tank. When I remove the cap after driving there's a loud whoosh as air rushes out.
I never have any gas smell in the garage.
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
sealed cap was added to contain gas fumes thru the charcoal cannister.
adding a vented cap basically removes this capability.
and provides the possibility of gas fumes emitting from the car.
also if you neglect the cannistor and lines, they may eventual leak,
adding more gas fume escape paths.
adding a vented cap basically removes this capability.
and provides the possibility of gas fumes emitting from the car.
also if you neglect the cannistor and lines, they may eventual leak,
adding more gas fume escape paths.
