corvette gas cap
Race Director
Joined: Oct 2000
Posts: 12,651
Likes: 3,110
From: Shamong, NJ
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,026
Likes: 4,174
From: US-PNW
I think that all '63 to '74 caps are interchangeable. They were marked VENTED up until 1970 at which point they were marked SEALED. In 1970 GM cars got the charcoal canisters to capture raw fuel vapors to eliminate it from escaping to atmosphere.
Race Director
Joined: Oct 2000
Posts: 12,651
Likes: 3,110
From: Shamong, NJ
If you have a cap marked "vented" you have the wrong cap, but it will still go on your 72.
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,026
Likes: 4,174
From: US-PNW
Just to add one more detail on the cap recommendations. If the charcoal canister system is still in place and operational then the SEALED cap needs to be used. If the system is inoperable or non-existent, ensure the tank ports have been sealed off and use the VENTED cap.
Using the wrong cap can lead to excessive fuel vapor odors because the design of the system for each has been compromised.
Using the wrong cap can lead to excessive fuel vapor odors because the design of the system for each has been compromised.
Drifting
Joined: Sep 1999
Posts: 1,970
Likes: 91
Just to add one more detail on the cap recommendations. If the charcoal canister system is still in place and operational then the SEALED cap needs to be used. If the system is inoperable or non-existent, ensure the tank ports have been sealed off and use the VENTED cap.
Using the wrong cap can lead to excessive fuel vapor odors because the design of the system for each has been compromised.
Using the wrong cap can lead to excessive fuel vapor odors because the design of the system for each has been compromised.
Only California 70's had na9, (eec). My 2 70's both have sealed caps.
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Cruising
Joined: Dec 2022
Posts: 11
Likes: 0
From: Center of France
An other solution
Just to add one more detail on the cap recommendations. If the charcoal canister system is still in place and operational then the SEALED cap needs to be used. If the system is inoperable or non-existent, ensure the tank ports have been sealed off and use the VENTED cap.
Using the wrong cap can lead to excessive fuel vapor odors because the design of the system for each has been compromised.
Using the wrong cap can lead to excessive fuel vapor odors because the design of the system for each has been compromised.