Fuel Pump leaks can be for many other reasons: worn-out seals, torn fuel lines, and loose connections. Perhaps the most ordinary cause of a leak from the Fuel Pump is an O-ring or gasket that has worn out. Such types of sealant components are installed in places where the Fuel Pump is sealed to the fuel tank, and the purpose of such components is to make sure no fuel escapes. Over time, these seals harden and can fail due to heat and age, much after 100,000 miles or even more. When they crack or degrade, fuel might leak out and create a smell that one can easily notice, which may pose a potential safety hazard in bad scenarios.
Other frequent culprits involve rusted fuel lines. The fuel lines transport the gasoline from the pump to the engine under pressure, generally between 40 and 60 PSI. Even a small crack or puncture in the line can allow fuel to seep out. Most of the time, the lines are constructed of rubber or plastic and, over time, will break down from relentless heat or cold. Regular inspection of these fuel lines for cracks or any other vulnerable areas might avoid the fuel line leaks altogether.
The fuel pumps also develop leaks due to the loose connections at the point of the pump itself or its fittings, which connect the fuel lines. If these are not well tightened, then fuel will start leaking out, hence causing loss of fuel and performance. That is very common in those vehicles on which recent replacement or maintenance of the fuel pump has been done and the connections may not have been properly tightened.
In 2019, the firm recalled more than 700,000 vehicles for the problem of Fuel Pump, including most leaks causing stalls, which also contributed to an increased fire risk. This huge recall simply drew a conclusion that any small leak can cause a huge concern with safety once left unattended.
As David Vizard, one of the world's most respected authorities on automotive systems, once commented, "Fuel system leaks are a time bomb-leaks that originate as a small drip can often grow until it becomes a major safety problem."
Because leaks must be avoided, regular maintenance with the Fuel Pump and surrounding parts must be performed to look for wear and tear and ensure that all connections are tightened appropriately. For more information about how to repair or avoid Fuel Pump leaks see Fuel Pump.