Repair 7

How to Change an Inline Fuel Filter

Fuel tanks are sealed environments with measures in place to prevent debris and sediment from entering an engine. An inline fuel filter catches and cleans contaminants directly from your fuel as it enters the tank. Most manufacturers do not prescribe a set interval for changing the fuel filter, but a good rule of thumb is to change the fuel filter whenever you perform any maintenance on the fuel lines or every 25,000 to 50,000 miles. The process takes around 15 minutes to complete properly.

Instructions

1

Relieve the pressure on the gas lines. Most fuel-injected vehicles have a vehicle-specific process for relieving pressure on the fuel lines. You typically release a valve near the air cleaner or use a specialized tool to force the fuel back into the gas tank. Proceed to Step 2 if you are unsure of your vehicles specific process.

2

Place hose clamps on the line before and after a joint in the fuel line. Disconnect the joint and angle both ends of the flexible line into the opening on a gas can. Release the clamps and allow the pressure to subside in the line. Reconnect the joint.

3

Disconnect the push fittings on the fuel lines connecting to the fuel filter. The connections will vary by vehicle, but most use a push connect tab that you remove before pulling the line off of the filter. Some use a garter spring that is held in place with a spring lock coupling. Open the coupling and pull the two connections apart.

4

Unbolt the fuel filter if it is hard-mounted to the frame. Install the new fuel filter by reversing the removal process.

5

Pressurize the lines. Turn the key to on, and slowly press the gas pedal to the floor three times. Wait a few seconds, and start the vehicle. Monitor the new fuel filter for leaks. Turn off the engine and correct any fittings that were not connected properly with the installation should you notice a leak.