Fuel Tank Breather Valves

Replacement Parts > Air and Fuel Delivery > Fuel Storage

Fuel Tank Breather Valves

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What is a Fuel Tank Breather Valve?

A Fuel Tank Breather Valve is a device that is fitted to the top of a fuel tank and is designed to control the flow of air in and out of the tank. The valve helps to prevent fuel from spilling out of the tank and is an essential component for safe vehicle operation.

What is the purpose of a Fuel Tank Breather Valve?

The purpose of a Fuel Tank Breather Valve is to regulate the air pressure inside of the fuel tank. This helps to prevent fuel from spilling out of the tank and keeps the fuel system operating correctly. It also prevents the formation of a vacuum in the tank, which can lead to fuel starvation.

How do I know if my Fuel Tank Breather Valve is faulty?

There are several signs that can indicate a Faulty Fuel Tank Breather Valve:

  1. A fuel smell or fuel leak in or around the fuel tank.
  2. Poor performance, such as difficulty starting or running issues.
  3. An illuminated check engine light.


Can a faulty Fuel Tank Breather Valve cause damage?

Yes, a faulty Fuel Tank Breather Valve can cause damage. If the valve is stuck open, it can allow too much air into the tank, which can lead to fuel starvation. If the valve is stuck closed, it can cause a vacuum in the tank, which can lead to fuel starvation and damage to the fuel system components.

How do I replace a Fuel Tank Breather Valve?

Replacing a Fuel Tank Breather Valve is a relatively straightforward process:

  1. Disconnect the negative battery cable.
  2. Drain the fuel tank.
  3. Remove the old valve and install the new one.
  4. Reconnect the negative battery cable.
  5. Refill the fuel tank and check for leaks.


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