My Griff's 'hissing' at me !

[lazyitus]

Put a tenner in and had a half hour blast tonight.

When I tucked it back into the garage and locked it, it started hissing at me from the back end.

I opened the boot and confirmed the hissing was coming from the filler cap.

I undid it and unsurprisingly it exhaled.

Should I be concerned about this hissing or is it naturally letting the build up of gas/air out?

[Ballistic Banana]

Yep, "They all do that sir" not a problem.

It normally happens after filling up i think, try a search as i am sure this has been explained on here before, or theres a bit on page 98 of the bible.

BB