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wtd: fuel tank breather
2b_pablo - 27/2/08 at 03:21 PM

as above, no idea where to get one from

DarrenW - 27/2/08 at 03:53 PM

Do you just have a short pipe out of the tank?

If so same as mine - i got a one way valve from aquarium place and piped that in high up above tank. Plastic jobbie, maybe £2 max. (In aquariums they are used when you fit air stones so the water doesnt siphon back from the tank if you have a power cut).

nitram38 - 27/2/08 at 03:54 PM

Try thinkautomotive.
Make sure that it is a two way breather or you will get a pressurized tank, especially if it is fuel injection with a return pipe.
Get one that will close if inverted.

[Edited on 27/2/2008 by nitram38]

2b_pablo - 27/2/08 at 03:55 PM

mine has a small pipe coming out of the filler pipe but has a bolt in it. M8 kinda size.

do you get a strong smell of petrol using a breather?

2b_pablo - 27/2/08 at 03:57 PM

quote:
Originally posted by nitram38
Try thinkautomotive.
Make sure that it is a two way breather or you will get a pressurized tank, especially if it is fuel injection with a return pipe.
Get one that will close if inverted.

[Edited on 27/2/2008 by nitram38]


car is carbbed but might go injection later on. no return pipe or swirl pot.

works fine as is but Im guessing it should really have a breather.

DarrenW - 27/2/08 at 04:00 PM

quote:
Originally posted by 2b_pablo
mine has a small pipe coming out of the filler pipe but has a bolt in it. M8 kinda size.

do you get a strong smell of petrol using a breather?

No smells whatsoever from mine. i think filler cap is vented as well so the aquarium bit probs has limited function.

02GF74 - 27/2/08 at 04:16 PM

quote:
Originally posted by DarrenW

I got a one way valve from aquarium place and piped that in high up above tank. Plastic jobbie, maybe £2 max.


has this resisted petrol?

I mean to make one using some brass tubing, a spring from a ballpoint pen and a small ball bearing as I can quite easily over fill the tank resulting in petrol pishing out of the breather!!

RazMan - 27/2/08 at 05:01 PM

If your cap is vented then you don't need a tank breather.

As mentioned, you should really go for a two way valve which can be quite pricey. Alternatively you can use a long tube which loops around the bottom of the tank and exits as high as possible. That will prevent spillages in a roll situation and allows vapour to escape but air to enter the tank.