Replacing Fuel Filter In 2002 Wrx: Step-By-Step Guide

Changing the fuel filter on a 2002 WRX is a simple task that can be completed with relative ease. However, it is important to exercise caution when handling the fuel system, as it involves working with highly pressurized flammable fuel. Before beginning, ensure that the key is out of the ignition and the gas cap is off to release any pressure. The fuel filter is located under the hood, next to the window wash tank, and is secured by a metal clamp. By removing the hoses and carefully separating the IN and OUT lines with a small flathead screwdriver, you can replace the old fuel filter with a new one. It is recommended to apply a small amount of oil to the new filter stems before reconnecting the hoses to ensure a smooth connection. Once the new filter is secured and the hoses are tightened, the gas cap can be replaced, and the engine can be started. It is important to check for any leaks around the filter after starting the engine.

Ensure the key is out of the ignition and the gas cap is off

To ensure safety when changing the fuel filter on a 2002 WRX, it is important to make sure the key is out of the ignition and the gas cap is off. This is because the fuel system is pressurized, and releasing the gas cap will help to relieve some of that pressure.

By taking this precaution, you can avoid the risk of being sprayed in the face with gasoline, as one person reported happening to their cousin. It is also important to be careful when removing the hoses from the old filter, as there may still be residual pressure in the lines.

Additionally, it is recommended to disconnect the fuel pump relay and run the car until it dies to further release the pressure in the fuel system. This can be done by locating the relay with a green plug under the passenger side kick panel next to the glovebox and disconnecting it. Then, crank the engine until it starts and dies, and repeat this process a few times.

Overall, ensuring that the key is out of the ignition and the gas cap is off is a crucial first step in safely changing the fuel filter on a 2002 WRX.

Locate the filter under the hood

To locate the fuel filter under the hood of a 2002 WRX, you'll need to open the hood and look near the window wash tank, close to the firewall. You should see an 'IN' hose and an 'OUT' hose with hose clamps, which can be removed with a small Phillips screwdriver. Be careful not to damage the rubber fuel lines when separating the hoses from the hard lines. The 'IN' hose comes from the firewall. The new filter should be labelled 'IN' and 'OUT' as well, to avoid confusion.

Remove the hose clamps with a small Phillips screwdriver

To remove the hose clamps, you will need a small Phillips-head screwdriver. This is a delicate task, so be sure to take your time and be careful not to damage the rubber fuel lines.

First, locate the fuel filter. On a 2002 WRX, it is under the hood, next to the window wash tank, near the firewall. You will see an 'IN' hose and an 'OUT' hose, and these are secured with hose clamps. Take your small Phillips screwdriver and carefully loosen and remove the hose clamps. Once the clamps are off, use a small flathead screwdriver to carefully separate the hoses from the hard lines. Remember that the 'IN' hose comes from the firewall.

Be very careful not to damage the rubber fuel lines as you work. It is a good idea to put a towel over the fender, as there is fuel inside the filter and you don't want it spilling onto the paintwork.

Separate the hose and hard line with a small flathead screwdriver

To separate the hose and hard line with a small flathead screwdriver, carefully follow these steps:

First, make sure your key is out of the ignition and that the gas cap is off to release any pressure. Locate the filter. On a 2002 WRX, it is under the hood next to the window wash tank, near the firewall. You will see an IN hose and an OUT hose, with hose clamps that need to be removed with a small Phillips screwdriver.

Next, use a small flathead screwdriver to carefully separate the hose and the hard line, being very careful not to damage the rubber fuel lines. Remember that the IN hose comes from the firewall. The new filter should be labelled IN and OUT as well, to avoid confusion.

When removing the hoses, be cautious as there may still be residual pressure in the lines. It is also important to note that the lines may be difficult to remove from the filter, so you might need to use a pair of pliers to twist them off if they are stuck.

Once the hoses are off, you can proceed to remove the old fuel filter. It is recommended to place a towel over the fender to catch any fuel that may spill out. Always be cautious when working with fuel, as it is highly flammable.

Remove the old filter and install the new one

To remove the old filter and install the new one, first locate the filter. On a 2002 WRX, it is under the hood next to the window wash tank, near the firewall. You will see an IN hose and an OUT hose, each with hose clamps that need to be removed using a small Phillips screwdriver. Next, use a small flathead screwdriver to separate the hose and the hard line in and out lines, being careful not to damage the rubber fuel lines. Remember that the IN hose comes from the firewall.

Once the hoses are off, unsecure the metal clamp holding the filter in place and remove the old fuel filter. Be careful, as there is fuel inside, so placing a towel over the fender is recommended. Check that the old and new filters are identical, then remove the rubber sleeve from the old filter and put it on the new one. Now, put the new filter in place and resecure the metal clamp.

A useful trick is to place a drop or two of oil on the new filter stems where the hoses go. You can use your oil dipstick for this. Now, tighten up the clamps and make sure the other hoses are in place.

Finally, replace the gas cap and start the engine. It may not start on the first try as the lines and filter need to be primed. Once it starts, check closely to make sure your lines are not leaking and double-check your work. Rev the engine a few times to ensure there are no leaks, and you're all set.

Frequently asked questions