Here's a general outline of the process. Specifics may vary slightly depending on options and condition of your car:
1. Safety First:
* Disconnect the negative battery cable. This is crucial to prevent sparks.
* Ventilate the area. Work in a well-ventilated space or outdoors.
* Wear safety glasses and gloves.
2. Prepare the Vehicle:
* Raise the rear of the car securely. Use jack stands, never rely solely on a jack. Make sure it's stable and level.
* Lower the fuel level. It's much safer and easier to work with a nearly empty tank.
3. Access the Fuel Tank:
* Locate the fuel tank straps. These are usually located on either side of the tank.
* Locate the fuel lines and filler neck. You'll need to disconnect these.
4. Disconnect the Fuel System:
* Disconnect the fuel lines. There will be at least one, possibly two. Use a fuel line disconnect tool to avoid damaging the lines. Carefully mark or photograph the connections to ensure proper reassembly.
* Disconnect the vent line. This is a smaller line that allows air to enter the tank.
* Disconnect the filler neck. This might require loosening clamps or bolts.
5. Remove the Fuel Tank Straps:
* Carefully loosen and remove the straps holding the tank in place. These are typically bolts or clamps. They might be rusty or difficult to remove, so use penetrating oil if needed and be gentle to avoid damaging the tank.
6. Lower the Fuel Tank:
* Slowly lower the fuel tank. It will be heavy, so be prepared. Have a helper if possible.
* Support the tank as you lower it. Avoid scratching or damaging the tank.
7. (Optional) Remove the Sending Unit:
* If you need to access the sending unit (fuel gauge sender), you'll likely need to remove it from the top of the tank *before* removing the tank from the car. This typically involves removing a retaining ring or bolts.
Reassembly is the reverse of removal. Remember to tighten all connections securely and double-check everything before lowering the car. Consider replacing any old or brittle fuel lines while you have the tank out.
Important Notes:
* Consult a repair manual: A 1966 Mustang repair manual specific to your model will provide detailed diagrams and instructions tailored to your car. This is highly recommended.
* Rust: Fuel tank straps and other components can be very rusty, especially on older cars. Use penetrating oil and appropriate tools to avoid breakage.
* Fuel spillage: Take extreme precautions to avoid spilling any fuel. If you do spill any, clean it up immediately.
* Professional help: If you are not comfortable working on your car, consider taking it to a qualified mechanic.
This is a general overview, and the specifics may vary based on your Mustang's exact configuration. Always prioritize safety and consult a repair manual for detailed instructions specific to your vehicle.
