Sprinter Fuel Filter Change: Step-By-Step Guide For 2008 Models

Changing the fuel filter on a 2008 Sprinter is a maintenance task that can be performed by following a step-by-step procedure. The fuel filter is located underneath a heat shield below the air filter housing, in the centre of the engine compartment. Before beginning, it is important to let the engine cool down to avoid any hot parts. The process involves removing the air filter housing, heat shield, and fuel filter retaining bracket bolt, as well as disconnecting and reconnecting various hoses, clamps, and connectors. It is recommended to refer to a detailed guide or seek assistance from a certified mechanic to ensure a safe and proper fuel filter replacement.

Disconnect the water in the fuel sensor harness connector

Disconnecting the water in the fuel sensor harness connector is a crucial step in changing the fuel filter in a 2008 Sprinter. This step ensures that the sensor is separated from the fuel filter, allowing for its safe removal. Here is a detailed guide on how to perform this step:

Firstly, locate the water in fuel (WIF) sensor harness connector. It is usually found near the fuel filter, on the driver's side towards the back of the engine. Once located, follow these steps:

• Disconnect the WIF sensor harness connector. This will involve unplugging the electrical connection between the sensor and the fuel filter. Be careful when handling the connector to avoid any damage.
• After disconnecting, set the connector aside in a safe place to ensure it doesn't accidentally reconnect while you're working on the fuel filter.
• With the connector disconnected, you can now safely remove the fuel filter. This will involve releasing the fuel inlet and outlet hose clamps and removing the hoses connected to the fuel filter.
• Once the fuel filter is removed, you can proceed to install the new fuel filter by following the manufacturer's instructions or a qualified mechanic's advice.
• After installing the new fuel filter, ensure that you reconnect the WIF sensor harness connector securely.

Remember to exercise caution when working on your vehicle and refer to a qualified mechanic if you're unsure about any steps or procedures.

Release the fuel inlet and outlet hose clamps

To release the fuel inlet and outlet hose clamps, you will need a 5mm hex bit and a flathead screwdriver.

First, open the clamp on the back side of the filter cage using the hex bit. Next, loosen the clamps on the two high-pressure hoses attached to the filter and pull them off. You can use a flathead screwdriver to help with this step if needed.

It is important to note that the OEM clamps require a special tool, and most people use pliers, which can cause issues when tightening them. If you are having trouble with the clamps, you may want to consider replacing them with aftermarket clamps that tighten with a hex bit or a flathead screwdriver.

Remove the fuel filter retaining bracket bolt

To remove the fuel filter retaining bracket bolt, you will first need to disconnect the negative battery cable. Once this is done, disconnect the water in fuel (WIF) sensor harness connector.

Now, you can release the fuel inlet and outlet hose clamps using a special tool, such as #9539, at the fuel filter. After this, you can remove the fuel filter retaining bracket bolt.

Separate the water in the fuel sensor from the fuel filter

To separate the water in the fuel sensor from the fuel filter, follow these steps:

First, locate the water in fuel (WIF) drain on the fuel filter. This is usually found in the middle of the fuel filter and is connected to a hose. Ensure you have a suitable container to catch the water and fuel mixture.

Second, open the WIF drain by turning it counterclockwise. You may need a specialised tool for this step, such as a 5mm hex bit, or even just a flathead screwdriver.

Third, turn the ignition key on for 20 seconds to activate the low-pressure fuel pump. This will help to remove the water from the system. You may need to repeat this step several times until all the water is removed.

Finally, close the drain and remove the hose, then ensure you dispose of the water and fuel mixture safely and appropriately.

It is important to note that you should only attempt this if you are confident in your abilities. If not, it is recommended to consult a qualified mechanic or technician.

Re-seat the water in the fuel sensor

To re-seat the water in the fuel sensor, you must first locate the fuel filter. In a 2008 Sprinter, the fuel filter sits underneath a heat shield below the air filter housing, in the center of the engine compartment.

To access the fuel filter, you will need to remove the air filter housing and the heat shield. Here are the steps to do so:

Removing the Air Filter Housing:

• Use a flat-head screwdriver to pop up the air vent on the two plastic connectors.
• Disconnect the black plastic air hose on the driver's side. It should snap off easily.
• Remove the cable on the driver's side by sliding it upwards.
• Loosen the clamp on the passenger side and remove the air hose.
• Remove the two electrical connectors from the passenger side. It is important to note that you should not turn the ignition without reconnecting these two electrical connectors, as it will trigger a check engine light.

Removing the Heat Shield:

• Use a Torx bit to remove the five spring-loaded screws that turn 90 degrees to detach.
• Pull out the metal piece and set it aside.

Now, the fuel filter is accessible. To remove it, perform the following steps:

• Open the clamp on the backside of the filter cage using a 5mm hex bit.
• Loosen the clamps on the two high-pressure hoses attached to the filter and pull them off.
• Disconnect the electrical connector by pulling it out.

At this point, you can lift the fuel filter out of its housing. There may be a hose in the way, but you should be able to maneuver past it.

With the fuel filter out, you can now access the water in the fuel sensor. Re-seating this sensor involves ensuring it is securely connected and seated within the fuel filter assembly. You may need to refer to specific instructions for your Sprinter model, but here are some general steps to follow:

• Locate the water in the fuel sensor within the fuel filter assembly.
• Inspect the sensor for any signs of damage or corrosion.
• Clean the sensor and its connection port if needed.
• Ensure the sensor is properly seated and secured in place. You may need to twist or lock it into position.
• Reattach any hoses or connectors associated with the sensor.

Once the water in the fuel sensor is re-seated, you can proceed to reinstall the fuel filter and the other components you removed earlier. Make sure to follow the steps in reverse order and secure all connections and fasteners tightly.

It is important to note that working on fuel system components can be dangerous, and you should always exercise caution and refer to appropriate safety guidelines. Additionally, the procedures mentioned here may vary slightly depending on your specific Sprinter model and configuration. Always refer to the manufacturer's instructions or seek the assistance of a qualified technician if you are unsure about any steps.

Frequently asked questions