- 1). Siphon out any gas that is remaining in your tank. Read the manufacturer's instructions on the siphon that you purchase in order to operate it properly. Make sure to store the gas in a safe location that is away from heat.
- 2). Disconnect your pump connector wires. The wires can be found behind the back bumper on the driver's side of your car. Unscrew the nuts that are holding down the straps and disconnect the three wires that lead to the fuel tank. The gas tank will still be attached to the pump.
- 3). Remove the pump. Tap a screwdriver into the metal ring that is holding the pump in place to open the ring. Remove the gas tank from the car.
- 4). Inspect the gas tank to locate the leak or leaks.
- 5). Sand the tank with sandpaper in order to see the leaks more clearly. This way you can find any additional small leaks. Sanding the tank will also help the putty adhere to the tank better. If you see a leak with rust buildup or debris, use a small pick to clean out the cracked area.
- 6). Add sealer putty to each area that is leaking. Allow the sealer putty to dry. Drying time will vary by manufacturer, but typically it's around 12 hours. Once the sealer putty is dry, sand it down so that it is even with the rest of the tank.
- 7). Reassemble the tank. Place it back on the ring, or pump, area and tap back into place. Reconnect the three wires and tighten the fastening nuts.
- 8). Fill the tank with the gas.
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