Replacing The Fuel Filter In Your Mitsubishi Montero

Replacing the fuel filter on a Mitsubishi Montero is a relatively straightforward process that can be done at home with the right tools and safety precautions. The fuel filter is an important component of the fuel system, trapping contaminants such as rust and dirt to prevent them from entering the engine and causing damage. While the process is similar across different models and years of the Mitsubishi Montero, there may be some variations, so it is important to consult a repair manual or a trusted mechanic for specific instructions for your vehicle. The cost of replacing the fuel filter can vary depending on the year and model of your Mitsubishi Montero, as well as your location.

Tools required

To replace the fuel filter on a Mitsubishi Montero, you will need a range of tools. The specific tools required will depend on the make and model year of your Montero, so it is important to consult a mechanic or a trusted source of information for your specific vehicle. However, here is a list of tools that are commonly required for this task:

• Metric line wrench: This tool is needed to loosen and tighten the fuel lines connected to the fuel filter.
• Hose clamp: A hose clamp is used to squeeze off the fuel supply line from the fuel tank, allowing you to work on the fuel filter without fuel leaking out.
• Catch pan: A catch pan is essential to collect any fuel or drips that may occur during the replacement process. It helps to prevent spills and reduces the risk of fire.
• Vice grips: Vice grips can be used to remove the fuel filter and any other components that need to be detached.
• Wrenches: You may need different sizes of wrenches, such as a 19mm wrench and a 14mm flair nut wrench, to hold and loosen various components, including the fuel filter and fuel lines.
• Jack and jack stands: In some cases, you may need to raise the vehicle and support it with jack stands to access the fuel filter safely.
• New fuel filter: It is recommended to have a new fuel filter ready as a direct replacement for the old one.
• O-rings: When reconnecting the fuel lines, it is a good idea to use new O-rings to ensure a tight seal and prevent leaks.
• Oil: A small amount of oil can be applied to the O-rings during re-installation to ease the process and prevent damage.

It is important to work safely and carefully when replacing the fuel filter, as you will be dealing with flammable liquids and high-pressure fuel lines. Always refer to a trusted repair manual or seek the assistance of a qualified mechanic if you are unsure about the procedure.

Step-by-step procedure

Step 1: Gather the necessary tools and safety equipment

You will need a metric line wrench, a hose clamp, a catch pan, safety goggles, and gloves. It is also recommended to have a fire extinguisher nearby as a safety precaution when working with fuel.

Step 2: Locate the fuel filter

The fuel filter on a Mitsubishi Montero is typically located beneath the vehicle, next to a sturdy frame rail. Refer to your vehicle's service manual or consult a mechanic if you are unsure about the exact location.

Step 3: Raise the vehicle and secure it with jack stands

Before proceeding, ensure that the vehicle is securely raised and supported with steel jack stands. This will provide you with better access to the fuel filter and ensure your safety while working underneath the vehicle.

Step 4: Depressurize the fuel system

It is important to depressurize the fuel system before removing the fuel filter. This will prevent gas from spraying out when you disconnect the fuel lines. Refer to your vehicle's service manual for the specific procedure, as it may vary depending on the model of your Mitsubishi Montero.

Step 5: Remove the fuel filter

Once the system is depressurized, proceed to remove the in-and-out connectors to the filter. Place the catch pan underneath the filter to collect any fuel or drips. Carefully remove the filter from the fuel line, being cautious not to damage the surrounding components.

Step 6: Install the new fuel filter

Take the new fuel filter and apply a small amount of oil to the O-rings. This will help ease the re-installation of the quick-connect fittings. Carefully connect the new fuel filter to the fuel line, ensuring that all connections are secure.

Step 7: Check for leaks

Start the engine and carefully inspect the fuel system for any signs of leaks. Ensure that there is no leakage of fuel, either liquid or vapor, at the fuel filter connections or any other part of the fuel system.

Step 8: Clean up and dispose of the old fuel filter properly

Once you have confirmed that there are no leaks, lower the vehicle and clean up any spilled fuel or residue with an appropriate absorbent material. Dispose of the old fuel filter and any contaminated materials properly, following local regulations and guidelines.

Step 9: Test drive the vehicle

After completing the replacement, take the vehicle for a test drive to ensure that it is running smoothly and that the new fuel filter is functioning correctly.

Fuel filter location

The fuel filter location on a Mitsubishi Montero depends on the model year of the vehicle.

For a 2001 Mitsubishi Montero Limited, the fuel filter is located inside the fuel tank. This is because the vehicle has a fuel filter built into the fuel pump module.

For a 2001 Mitsubishi Montero Sport Limited, the fuel filter is located at the driver's side frame rail at the rear, just beneath the rear passenger door.

There is a YouTube video that provides a step-by-step procedure for changing the fuel filter on a Mitsubishi Montero. However, the model year of the vehicle in the video is not specified.

Fuel filter replacement cost

The cost of replacing a fuel filter depends on the type of car you have. The average cost for a replacement is $70 to $150, but you can expect to pay between $90 and $142 for parts and labour.

For example, one car owner reported that they were charged $450 AUD for a fuel filter replacement for their Honda Civic 2012 (~70000km). This was considered a high charge, as the internet told them that the cost would usually be between $75 and $200.

It is recommended that you change the filter before you start noticing any signs of a clogged fuel filter, such as poor engine performance, hard starting, vehicle stalling, or fuel system component failure.

When to replace the fuel filter

The maintenance interval for a fuel filter varies depending on the vehicle's make, model, and year. Some vehicles may need a replacement every 20,000 miles, while others can go up to 150,000 miles on the same fuel filter. If you have a newer car, your fuel filter may even be a lifetime one that doesn't require routine maintenance or replacement. Always refer to the manufacturer's recommended maintenance schedule for your specific vehicle.

Several factors can affect the lifespan of your filter, such as filter quality, vehicle age, and driving habits, so you may need to replace the filter sooner than expected. Dirty fuel and water in the fuel system can also cause the filter to clog. Water in the filter housing can trigger a sensor and cause a check engine light (CEL) to come on.

Some common signs that it's time to replace your fuel filter include:

• Difficulty starting your car: A clogged fuel filter restricts the flow of fuel to the engine, making it hard for the engine to start.
• Sluggish acceleration: A dirty fuel filter restricts gas flow, causing the engine to hesitate or stumble during acceleration, especially when going uphill or carrying heavy loads.
• Rough idling: A clogged filter can limit the amount of fuel reaching your engine, resulting in more intense vibrations or lurching when accelerating.
• Frequent stalling: If the fuel filter is severely clogged, the insufficient fuel supply may cause your engine to stall frequently, especially at idle.
• Strong gas odour: A clogged fuel filter can cause unburnt fuel to escape through the exhaust system, leaving a strong gas odour in the cabin.
• Strange noise from the fuel pump: When the fuel filter is clogged, the fuel pump has to work harder to push gas through, which can cause it to produce a strange noise.
• Check engine light comes on: Low fuel pressure due to a clogged filter can trigger the check engine light.

It's important to note that changing your fuel filter by mileage may not always be effective, as a single bad tank of fuel can clog a new filter. Therefore, it's recommended to keep an eye out for any signs of a clogged fuel filter and change it as needed.

Frequently asked questions