Scotty_Tradewind
Well-Known Member
Diesel has recently started to seep up out of the diesel tank breather pipe.
It does this at all levels of diesel in the tank.
Why?
It does this at all levels of diesel in the tank.
Why?
DIESEL COMES UP OUT OF BREATHER
- Thread starter Scotty_Tradewind
- Start date
covenanter
Well-Known Member
pressure in the tank, has the tank cap got a blocked air bleed hole.
Elessar
Well-Known Member
breather pipe should be free flowing to stop pressure (or vacuum) build up in the tank - you shouldn't have an air hole in the filler as that would let water in.
The pipe should go as high as possible before the breather outlet, so there is often a loop above the breather if there is room.
The pipe should not have any low spots where liquid can collect, it needs to go uphill all the way from the tank, even level is bad.
I would guess something in a locker has pulled the breather pipe down such that the loop that should be above the breather has been pulled down to make a low spot. This would fill with liquid allowing pressure to build until the liquid is pushed up as far as the breather outlet then voila.
The pipe should go as high as possible before the breather outlet, so there is often a loop above the breather if there is room.
The pipe should not have any low spots where liquid can collect, it needs to go uphill all the way from the tank, even level is bad.
I would guess something in a locker has pulled the breather pipe down such that the loop that should be above the breather has been pulled down to make a low spot. This would fill with liquid allowing pressure to build until the liquid is pushed up as far as the breather outlet then voila.
Scotty_Tradewind
Well-Known Member
thanks guys for getting back to me on this.
The pipe is a bit horizontal in one place . I shall try to reroute it. The exit does have a downturn on it - to stop water getting down there I suppose.
I cannot see a bleed hole in the tank cap. Would it be ever so small to stop water ingress? I shall have to get the magnifying glass out!
The pipe is a bit horizontal in one place . I shall try to reroute it. The exit does have a downturn on it - to stop water getting down there I suppose.
I cannot see a bleed hole in the tank cap. Would it be ever so small to stop water ingress? I shall have to get the magnifying glass out!
Talulah
Well-Known Member
Has the rubber o ring gone around your filler cap and the tank is filling up with rain water faster than you're using it?
pampas
Well-Known Member
Had a simular problem one year and found the jerry can had bent the pipe (Breather) resulting in a down turn. with full tank filled to deck level fuel was forced out of the goose neck. modified so there is a rise in the entire length, problam cured
Scotty_Tradewind
Well-Known Member
I hope not Ed' but worth checking everything.
