Disco 2 D2 td5 fuel tank breather

So it's been parked up for over a week obviously didn't like it took an age to get fuel in it.
Found a kinked pipe can anyone confirm the tank breather is the smaller one with the loop in it? Pic attached thank you

stustrong said:

So it's been parked up for over a week obviously didn't like it took an age to get fuel in it.
Found a kinked pipe can anyone confirm the tank breather is the smaller one with the loop in it? Pic attached thank you

Click to expand...

Yes and no all at the same time.

The thin plastic pipe is indeed a breather but it is the air inlet and has a one way valve on it to stop fuel sloshing out.

The bigger rubber pipe you see in the picture coming from just beneath the sender is the filler breather hose and connects to the fuel filler neck and vents the air from the tank as you fill with diesel, the cap is sealed you see hence the use of the narrow gauge plastic vent pipe with the one way valve.

Hope that helps.

Not quite so, the thin one is a vent pipe(nr 23) not a breather and it's supposed to have that loop on it that's how it was designed, there is a roll over valve but not in that pipe but in the tank, the other thick one is a breather hose but not to the filler, it goes toward the front, the filler's atmospheric vent pipe is not in that picture, the function of each pipe in the following scheme is explained in the WSM :
Fuel tank breather system
The filler tube incorporates a tank vent which allows air and fuel vapour displaced from the tank when filling to vent to
atmosphere via the filler neck.
A breather spout within the tank controls the tank 'full' height. When fuel covers the spout it prevents fuel vapour and
air from escaping from the tank. This causes the fuel to 'back-up' in the filler tube and shuts off the filler gun. The
position of the spout ensures that when the filler gun shuts off, a vapour space of approximately 10% of the tanks total
capacity remains. The vapour space ensures that the Roll Over Valve (ROV) is always above the fuel level and vapour
can escape and allow the tank to breathe.
The ROV is welded on the top surface of the tank. The ROV is connected by a tube to the filler tube, which in turn is
connected to the atmospheric vent pipe. The ROV allows fuel vapour to pass through it during normal vehicle
operation. In the event of the vehicle being overturned the valve shuts off, sealing the tank and preventing fuel from
spilling from the atmospheric vent pipe.

Thank you I found the loop bit was kinked up hard against itself.. so was hoping that may be the issue