Reply to "Fuel Vapor Cannister"

Dear Inquisitive Minds,


Pertinent to this discussion,is my experience with my two late Pantera L cars. In the last two years, I pulled the drivetrain and pulled the gas tank from one, which was leaking. While it was out, I modified the tank for a larger AN 8 fuel line that entered the tank through the opening for the vent tube, which is plumbed to the charcoal cannister. After the vent fitting was removed, I inspected it and found that the vent tube was completely blocked at the entry end from the tank into the fitting. It was blocked as it was cast. Externally, it looked perfectly normal and internally, it was completely blocked and non-functional.

Months later I did the same modification to the other Pantera's gas tank. It had the same foundry, factory defect and a completely non-functional vent fitting.

So, from my experience, if you want to see if you have a vent fitting that actually sends gasoline vapor to the charcoal cannister, then pull the tube off and try to slip a wire into the vent nipple tube fitting. You should be able to tell soon quickly, if your vent is blocked from the foundry or if it does work as designed.

FWIW.

Warmest regards, Chuck Engles