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XSPEC 30 litre diesel tank – leaking seal

TheDocAUS

Grenadier Owner
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The yellow XSPEC 30 litre diesel tank is mounted on XSPEC Window Utility Frame. These tanks come with an integrated funnel/spout/pourer in the cap. When the tank is sealed, the funnel points inside the tank. If you are pouring out fuel manually, the funnel is reversed and it gives you a funnel to go into the car filler neck.

WORD OF CAUTION: when the funnel is inside the tank make sure the funnel is flat against the opening and not at any angle, even a slight one. I recently had a small diesel leak out of my tank. I stopped and found a small amount of diesel across the back of the car, when doping a walk around. I thought the cap may have come loose, it was tight. Off I went.

I kept a close eye on the tank and it was leaking again. I stopped. The cap was not loose and everything looked sealed, until I undid the cap. When I did that, I could see the funnel was not flat against the container opening, leaving a very small gap in the rubber seal – the source of the leak. It was not visible until I undid the cap.

I am now sourcing a cap without a funnel to avoid this problem. XHQ are helping. I will put the funnel cap in the car if I need it - I normally use the electric fuel pump. This way I can always ensure a good seal when putting on the cap.

LESSON: check the car when you stop to find these issues early.

The red 20 litre XSPEC Petrol tank also has a reversible funnel.

XSPEC-INEOS-GRENADIER-FUEL-TANK-30L-DIESEL-2.jpg


Petrol model
XSPEC-INEOS-GRENADIER-FUEL-TANK-PETROL-2.jpg
 
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To add, the rubber seals in these types of funnelled tanks are IME a bit suspect. And when exposed to heat/UV/compression or accidental pinching, deterioration is inevitable.
Might be worth sourcing Viton ones for anything mounted to a vehicle. At least carry a spare.
 
To add, the rubber seals in these types of funnelled tanks are IME a bit suspect. And when exposed to heat/UV/compression or accidental pinching, deterioration is inevitable.
Might be worth sourcing Viton ones for anything mounted to a vehicle. At least carry a spare.
Tanks are made in Australia, but I cannot find the details. I have in the past.

I am after a spare for both tanks, preferably with no spout.

I will also source some Viton gaskets, when I know sizes. EDIT: 40mm is the outer diameter of the gasket. The outer diameter of the cap is 50mm.
 
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