There's no easy access drain plug like some other fluids. Here's how it's generally done, outlining the risks and emphasizing the need for caution:
Method (requires specialized tools and knowledge):
1. Safety First: Work in a well-ventilated area, away from any ignition sources (cigarettes, sparks, etc.). Wear appropriate safety gear, including gloves and eye protection.
2. Disconnect the Battery: This is crucial to prevent accidental sparks. Disconnect the negative (-) terminal first.
3. Locate the Fuel Pump: This is usually inside the fuel tank, requiring dropping the tank. Consult a repair manual specific to your 1991 Lumina to find the location and procedure. This is likely the most difficult part of the process.
4. Lower the Fuel Tank: This involves disconnecting fuel lines, electrical connectors, and support straps. You'll need jack stands and potentially other tools to safely support the vehicle and access the fuel tank. Do not attempt this without a repair manual showing exact procedures and safety precautions. Improperly supporting the tank is dangerous.
5. Access the Fuel Pump: Once the tank is lowered, you'll need to access the fuel pump itself. This usually involves removing the fuel pump access panel on top of the tank.
6. Siphon the Fuel: After removing the pump assembly, you can carefully siphon the fuel out. Use a siphon pump specifically designed for fuel, not just a regular siphon hose. Never use your mouth to siphon gasoline.
7. Reassemble: Once the tank is mostly empty (some residual fuel will remain), carefully reassemble everything in the reverse order. Pay close attention to proper sealing and connections.
8. Reconnect the Battery: Reconnect the positive (+) terminal last.
Important Considerations:
* Repair Manual: A repair manual specific to your 1991 Lumina is absolutely essential. It will provide detailed instructions, diagrams, and torque specifications. Improper reassembly can lead to serious problems.
* Disposal: Properly dispose of the gasoline. Do not pour it down the drain or onto the ground. Contact your local waste management facility for guidance on disposal.
* Professional Help: If you're not comfortable performing this task, it's best to take your car to a qualified mechanic. This is a potentially hazardous procedure.
Alternatives to Draining:
If you need to remove fuel for repairs (such as fuel pump replacement), often the fuel lines can be disconnected, and the remaining fuel pumped out through the fuel lines using a suitable pump. This is a safer and easier option than dropping the tank if the work is limited to the pump.
In summary: Draining a fuel tank is not a simple DIY project. The risks involved make it strongly recommended to seek professional help unless you have extensive automotive experience and the appropriate tools and safety equipment. Using a repair manual is paramount for safety and success.
