Thread: Puma - overfill of fuel tank?

Originally Posted by newhue

In my case the breather filter thing was blocked.

There's no filter on mine, just the hockeystick and then infinite

I wonder if thats the issue (its missing)?

(assuming that the filter is a fuel filter type cannister thingo and not something inside the tube?)

No, nothing missing. There should be a grey/black 1 way valve about 125mm from the end, its about the size of a 50c coin roughly. It's there to allow air in to the tank as the fuel is used otherwise a vacuum would occur and no fuel or a sucked in tank (apparently).

Mine was doing the same. I got a small brass male to male fitting put in the end of the black pipe you are holding, then ran pipe from that up in behind the plastic panel that covers the rear of the drivers side rear lights. On the end I just put a small fuel line filter to stop any dust. Haven't had it do it since, about 6000kms

Mick

I dont have this valve.

I might do this mod, thanks

Has anyone got an exploded picture out of the service manual to show how the assembly should go?

(answering my own question here)

From the service manual:

"FUEL TANK BREATHER SYSTEM

The filler tube incorporates a tank vent which allows air and fuel vapor 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 vapor 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 vapor space of approximately 10% of the tanks total capacity remains. The vapor space ensures that the Roll over Valve (ROV) is always above the fuel level and vapor can escape and allow the tank to breathe.

The ROV is welded on the top surface of the tank. The ROV is connected to the atmospheric vent pipe. The ROV allows fuel vapor 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.

The atmospheric vent pipe includes a two-way valve which allows for over-pressure relief one way and allows for air to enter the tank as the system operates in depression."

Sounds like i have an issue with the breather spout and/or ROV

Originally Posted by Samblers

I dont have this valve.

I do have this valve

Idiot.

Hi Sam,

Its generally good practice to use reticulation fittings as sold by Bunnings to extend and raise all the breather hoses around the car. You can buy a "wading kit", but its just money spent on the same type of fittings. All my previous Defenders had this done and I never had issues. This is particularly important for people who wade and cross water often.

As it just lets air in and out (expanding and contracting on all but the fuel tank which is oneway) there is no issue with flow restrictions and I've used retic 5mm joints, T's and hose to join them together and raise them all nice and high.

The rear diff breather is particularly useless in its normal state and I've raised all the rear ones as high as the body capping (hight of the rear tub) and the various ones arriving in the engine bay has been raised as high as the snorkel bracket. I used one the the snipped off "hockey stick" jobbies to terminate it so that no water can get in as its now sitting behind the snorkel/ RAI.

Cheers,

Lou

Thanks Lou

Did you buy extra hockey sticks? From Land Rover?

Cheers, Sam