fuel cap fix?

[skater]

Hi,

Quick question. Is the fuel cap "serviceable"?

Mine does the "air sucking" thing when opened after a longer journey,
especially if brimmed before journey.

Have searched but didn't find my answer.

Thanks, James.

[2sticks]

That's how it should be. There is a vacuum relief valve in case the
pressure (vacuum) gets too low in the tank which will stop the tank
collapsing. It's designed to stop fuel fumes escaping from the tank.

[skater]

So there shouldn't be an " intake breath " when cap opened?

Should the vacuum relief valve keep pressure equalised as the fuel is used?

[teenmal]

So there shouldn't be an " intake breath " when cap opened?

Should the vacuum relief valve keep pressure equalised as the fuel is used?

Hi skater,

That how it works,

Cheers..

[skater]

That's what I thought.
So my cap doesn't seem to be relieving the pressure drop.

Has anyone fixed theirs or do I just buy a new one?

Thanks.

[francophile1947]

I think they may be designed to keep a slight vacuum, because mine always did make a slight hiss when removed.
However, mine did bung up (probably with veg oil), so I just put it in hot, soapy water for a few minutes, until I could easily suck air through it - no problems since

[skater]

ah, good idea. probably won't try sucking through it though.

[mister munkey]

If you need one, I have a spare cap Skater, PM me an address & I'll bung it in the post.

[francophile1947]

ah, good idea. probably won't try sucking through it though.

Oh go on I did rinse the soap off first, so I was just sucking clean plastic and you know that air will go through it again

[brorabongo]

I stripped my cap at the beginning of July, and never bothered putting back together since. I don't run with a full tank, as it might leak through the cap? I've not noticed any difference in the running of the Bongo.

http://www.igmaynard.co.uk/bongo/forum/ ... ap#p427070

[skater]

Thanks mister munkey, have washed mine as recommended

Haven't done long journey yet but think the intake breath seems a bit less when checked so far.

James.

[haydn callow]

Intake breath is normal !!

[Barrington]

Ive always had slight intake of breath from the fuel tank mostly on empty, is this normal then????

[haydn callow]

yes

[Barrington]

Cheers Haydn