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Fuel leak types come in the form of liquid leaks and vapor leaks. Let’s start with liquid fuel leaks. Liquid fuel leaks are often easy to spot and easy to identify. Gasoline, or petrol, has a distinctive odor. In addition, it evaporates very quickly—so quickly in fact that you can see the light distort above a puddle of fuel as the vapors disperse into the atmosphere. For this reason gasoline is VERY dangerous. In truth, it’s not the liquid fuel that burns; it’s the vapors. You can actually put out a fire with liquid gasoline as long as you put it on fast enough. I don’t recommend you try it, however.

That said, you often find fuel leaks near the fuel tank. Sometimes the tank rusts out and begins to leak. In the case of a plastic fuel tank, it can get damaged or crack. In the case of a rusty tank, I’ve heard you can rub a bar of soap on the hole to temporarily seal it. I’ve never tried this, but I can’t see the harm. You can have fuel tanks repaired if you don’t have the money to replace them. Look up the specialty shops in your area.

gas tank leak

Fuel tanks are not the only place you might find fuel leaks. It can also leak from the fuel lines and fuel filter going to the engine, as well as from the engine itself. I’ve even seen fuel injectors leak right onto the intake manifold. Kinda scary since the engine gets hot enough to ignite such a mixture. For this reason, it’s a top priority to repair a fuel leak if you find one. Any heat source can ignite the fuel, which can have catastrophic results.