ISUZU N Series
What the hazard is
Vehicle malfunction
What to do
Arrange for rectification by their servicing Isuzu Truck Dealer
Defect
During the initial charging of the CNG fuel tank, by lowering the temperature of the gas, cracks developed in the soluble alloy of the safety valve. Subsequent charging of the fuel tank in the field resulted in the cracks becoming penetrating cracks. If a vehicle is used under such conditions it is possible that gas can leak from the safety valve.