Fuel tank cap, vented or non-vented (Stant 10571)

[shone190]

Hi guys,

   I have Charger 1973 and Stant 10571 fuel gas cap. Does somebody know, is this vented or non-vented cap?

I found this on Stant web site: http://ww2.stant.com/modules/partLocator/view_diagram.cfm?id=10571

There is "Regular Locking Fuel Cap" as you see, so it should be non-vented, right?

This is my gas cap.


There is a small hole as you can see, and I can suck in but can't blow out air. Therefore, this should be vented cap or I am wrong?

Thanks in advance.

[maxwellwedge]

They aren't saying much in that link - but starting in 71 - the factory caps started saying pressure/vacuum on them. They went to ECS system.

[303 Mopar]

Just blow on it.  Sounds simple but it will tell you if its vented or not.  If it is not and you want it vented, just drill some small holes in the inside metal cap piece.

[shone190]

As I said, I can't blow on it but can suck the air through this little hole on the back of the fuel cap. So, the air can go only in one direction.

[303 Mopar]

As I said, I can't blow on it but can suck the air through this little hole on the back of the fuel cap. So, the air can go only in one direction.

Sorry, didn't see the text under your pic.  It's vented for sure. 

[shone190]

Thanks , I thought it is vented, but just to ask and confirm