Vans leak test kit was used to test the Left tank. A cap was placed on the fuel pickup line, a tire fillup nozzle (I don't know what to call it) was placed on the drain valve with fuel lube, and a balloon was placed on the fuel vent line. The balloon acts as a pressure relief valve. The tank was then pumped up using a bicycle pump until the balloon inflated. Soap and water was used to detect any leaks. NO LEAKS!!!!