
Regular fuel filter changes are an important part of engine maintenance for Ford F-series owners and enthusiasts with a Power Stroke diesel engine. The 2006 Ford F350 6.0L Diesel has two fuel filters. The first filter mounts on top of the engine on the left-hand side. The second filter is inside the diesel fuel conditioner module. The module is attached to the fuel tank in different locations depending on the configuration of your truck.
| Characteristics | Values |
|---|---|
| Number of filters | 2 |
| Location of first filter | On top of the engine on the left-hand side |
| Location of second filter | Inside the diesel fuel conditioner module, which is attached to the fuel tank |
| Tools required for removal | 36 mm socket and a 3/4" drive, oil filter wrench |
| Maintenance | Regular fuel filter changes are important for engine performance and to prevent fuel injection system damage |
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What You'll Learn
- The first filter is mounted on the left-hand side of the engine
- The second filter is inside the diesel fuel conditioner module
- Regular fuel filter changes are necessary for engine maintenance
- Draining the diesel fuel conditioner module: turn the drain plug counter-clockwise
- Tools required: 36 mm socket, 3/4 drive, oil filter wrench

The first filter is mounted on the left-hand side of the engine
Your 2006 Ford F350 Diesel contains two fuel filters. The first filter is mounted on the left-hand side of the engine, on top. The second filter is inside the diesel fuel conditioner module, which is attached to the fuel tank. The exact location of the module depends on the configuration of your truck.
The first filter, mounted on the left-hand side of the engine, is positioned just to the left of the oil filter. To remove it, you will need a 1/2 square drive. This filter should be regularly maintained and changed to ensure optimal engine performance and to avoid fuel injection system damage.
When changing the left-hand side engine-mounted filter, it is important to follow the correct procedure. Firstly, locate the filter and drain the diesel fuel conditioner module. Turn the drain plug counterclockwise to do this—no tools should be used for this step. Approximately 0.53 gallons, or 2 litres, of fuel will be drained, which should be disposed of in an appropriate container. Do not reuse this fuel.
The left-hand side engine-mounted filter can be accessed from the passenger side of the vehicle. Using a 36 mm socket and a 3/4" drive, loosen the cap. An oil filter wrench, similar to tongs, can then be used to remove the filter. It is important to note that working on the driver's side of the vehicle may be more difficult, so it is recommended to approach this task from the passenger side.
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The second filter is inside the diesel fuel conditioner module
The 2006 Ford F350 Diesel has two fuel filters. The second of these is located inside the diesel fuel conditioner module. This module is attached to the fuel tank, with the exact location depending on the configuration of your truck.
To change the second filter, first locate the filter and drain the diesel fuel conditioner module. Turn the drain plug counterclockwise until it stops—do not use any tools to loosen the drain plug. Approximately 0.53 gallons (2 litres) of fuel will be drained from the module into an appropriate container. Do not reuse this fuel.
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Regular fuel filter changes are necessary for engine maintenance
Regular fuel filter changes are an important part of engine maintenance. Your vehicle has two fuel filters. The first filter mounts on top of the engine on the left-hand side. The second filter is inside the diesel fuel conditioner module, which is attached to the fuel tank.
The fuel filter is crucial for engine health, acting as a permeable barrier to clean fuel of impurities and contaminants. Sediment can get into a vehicle's fuel tank when you pump fuel from the bottom of a storage tank at a gas station, and this can clog the filter or restrict the flow of fuel. A clogged filter can cause starting issues, rough idling, and stalling. It can also cause the vehicle to shut off while driving, which could result in personal injury.
Some car manufacturers, such as Volkswagen, Subaru, and Mercedes-Benz, recommend periodic replacement of the fuel filter. For example, VW recommends replacing the filter every 20,000 miles, while Subaru recommends a new one every 60,000 miles. Most technicians will include fuel filter replacement during regularly scheduled maintenance intervals. However, replacement intervals vary by vehicle age and usage, ranging from 20,000 to 150,000 miles, with newer models often having lifetime filters.
To replace the fuel filter on a 2006 Ford F350 diesel, you will need to locate the filter cap on the passenger side and loosen it using a 36 mm socket and a 3/4" drive. You can then use an oil filter wrench to remove the cap.
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Draining the diesel fuel conditioner module: turn the drain plug counter-clockwise
Your Ford F350 has two fuel filters. The first is mounted on top of the engine on the left-hand side, and the second is inside the diesel fuel conditioner module. The module is attached to the fuel tank, and its location depends on the configuration of your truck.
Draining the diesel fuel conditioner module requires you to first switch the ignition on for 30 seconds and then switch it off. Repeat this process six times to purge any trapped air from the fuel system. Next, locate the filter and turn the drain plug counter-clockwise until it stops. Do not use any tools to loosen the drain plug.
As you drain the filter, approximately 2 litres of fluid will come out, which you should collect in an appropriate container. Do not reuse this fuel.
After draining, disconnect the electrical connector and loosen the bolts securing the lower portion of the diesel fuel conditioner module housing. Do not fully remove the bolts at this stage. Remove the lower portion of the housing and slide the filter element towards the drain plug to disengage the securing clips.
Now, you can slide the filter element into the housing and engage the securing clips. Install the lower portion of the housing and tighten the bolts until you feel strong resistance. The maximum torque should be 9 Nm. Finally, connect the electrical connector and tighten the drain plug by turning it clockwise until it stops and you feel a strong resistance.
It is important to note that you should not use any tools to tighten the drain plug. Although the fuel system is not fully pressurised when the vehicle is off, some residual pressure may remain. Therefore, it is recommended to place an absorbent cloth below the filter connectors to catch any fuel that may drain.
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Tools required: 36 mm socket, 3/4 drive, oil filter wrench
To remove the frame-mounted fuel filter cap on a 2006 Ford F350 diesel, you will need the following tools:
- A 36mm socket
- A 3/4 drive
- An oil filter wrench (tongs-like variety)
First, remove the water in the fuel Allen head to let most of the fuel out of the filter. Then, using the 36mm socket and 3/4 drive, loosen the cap. Finally, use the oil filter wrench to finish the job. Note that it's recommended to work from the passenger side, rather than the driver's side.
It's worth mentioning that changing the fuel filter on this model doesn't get easier, and it may feel like you're going to tear the lines loose on the housing.
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Frequently asked questions
Your vehicle has two fuel filters. The first filter mounts on top of the engine on the left-hand side. The second filter is inside the diesel fuel conditioner module, which is attached to the fuel tank. The exact location of the module depends on the configuration of your truck.
Regular fuel filter changes are an important part of maintaining your engine. To change the filter, first locate and drain the diesel fuel conditioner module. Then, turn the drain plug counterclockwise until it stops. Do not use any tools to loosen the drain plug. Drain the filter into an appropriate container and do not reuse the fuel.
You will need a 36 mm socket and a 3/4" drive to loosen the cap. You will also need an oil filter wrench, which can be found at auto shops such as Auto Zone or Kragen.
Failing to keep with the scheduled maintenance could lead to engine performance issues and fuel injection system damage. Refer to your owner's manual for information on how often you should change your fuel filter.











































