Gas Cap Hissing

[Poasttown]

Has anyone experienced a hissing sound from the gas tank after shut down. Opening the gas cap stops the sound. This infrequently occurs, 2019 F3L. The last time with the tank on the empty side.

My research on this site is relatively old, 2016, and this didn’t seem to result is much concern about the hissing.

Thanks
Poasttown

 

[cravenfun]

My F3 does it when gas in tank is warm. Excess pressure venting off. Makes a whining sound. My BRP snowmobiles do the same thing.
Loosening cap lets that pressure out.

 

[Poasttown]

Thanks for the info, craven.
Poasttown

 

[BLUEKNIGHT911]

My F3 does it when gas in tank is warm. Excess pressure venting off. Makes a whining sound. My BRP snowmobiles do the same thing.
Loosening cap lets that pressure out.

:agree: .... I don't hear it often because in Vermont very high temps are not the Norm , but it has occurred .... Mike :thumbup:

 

[Poasttown]

Thanks Blueknight


Poasttown

 

[carsong]

Yes. Mine was very annoying. It took me a while to figure out where the sound was coming from. It got embarrassing, in traffic. I solved the problem by replacing it with a fuel cap from LaMonster. Works great, and very nice not having to deal with fighting to close the original fuel cap and, of course, no weird noise.

 

[canamjhb]

That's just the high-priced fuel giving you the "razzberry" as it eats through your wallet and exits out your exhaust pipe....