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Discussion Starter #1
I have a 66 Chevelle Malibu with the stock tank.

- Is my tank vented or not????

- I ordered a vented gas cap from Ground Up, but it does not fit.
 

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You do not need a vented cap.
The tank is already vented on your Malibu.
I think the station wagons are different and get a vented cap.
 

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Discussion Starter #3
Thanks Todd.

The tank does have a pipe from the top of the tank that goes into the trunk area and then back down again.

I have a non-vented cap that fits. I will use that one.
 

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This is a question I've had for a long time and just finally did a search on the forums to find the answer. I have a bunch of parts cars and I can say that wagons and El Caminos don't have the same vent tube that goes into the trunk area of other 64-67 Chevelles. I also wondered about a vented cap on the rear of the tank where it might seep out under acceleration. The wagons and Elks have side fill tanks so it isn't an issue unless cornering. Years ago I asked the kid working at the Paddock this same question and his explanation was that your car might explode if you didn't have a vented cap...
Thanks for the help!
 

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Ground Up also sent me the wrong cap for my '65. Its a non-vented cap but doesnt fit...........I think its for a different year. I ended up using the old cap that I had since it was in good shape.
 
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