Here's a general outline. This is not a complete, step-by-step guide, and specific procedures will vary depending on the engine and body style of your truck. Consult a repair manual specific to your 1984 Chevy pickup model for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment for this type of work.
Safety First!
* Disconnect the battery negative terminal. This prevents accidental sparking.
* Work in a well-ventilated area. Fuel fumes are dangerous.
* Wear safety glasses and gloves.
* Have a fire extinguisher readily available.
* Use appropriate tools. You'll need wrenches, pliers, tubing cutters, and possibly a flaring tool (depending on the type of lines).
* Properly dispose of old fuel lines and fuel. Don't just throw them in the trash.
Steps (General Outline):
1. Identify the Fuel Lines: Determine which lines need replacing (supply, return, and possibly vent lines). Note their routing and connections. Take photos if necessary.
2. Drain the Fuel Tank: This is crucial to minimize fuel spillage. Consult your manual for the proper drain procedure.
3. Disconnect the Fuel Lines: Carefully disconnect the fuel lines at the tank, fuel pump, carburetor (or fuel injectors), and any other connections. Have rags ready to soak up any spilled fuel. You may need to loosen clamps or use line wrenches. Be prepared for some fuel to leak.
4. Remove Old Fuel Lines: Carefully remove the old fuel lines. They may be clamped to the frame or other components. You may need to loosen or remove these components for easier access. Take note of the routing.
5. Prepare New Fuel Lines: Measure and cut the new fuel lines to the correct length. If the lines are metal, you'll likely need to flare the ends to create a proper connection for the fittings. If using flexible lines, ensure the proper fittings are used.
6. Install New Fuel Lines: Carefully route the new fuel lines, following the path of the old lines. Secure them with clamps to the frame or other mounting points. Ensure that the lines are not kinked or pinched.
7. Connect the Fuel Lines: Connect the new fuel lines to the fuel tank, fuel pump, carburetor/injectors, and other components. Tighten all clamps and fittings securely. Double-check all connections.
8. Check for Leaks: Carefully inspect all connections for leaks. Start the engine and check for leaks again. If leaks are present, tighten connections or replace any faulty components.
9. Reconnect the Battery: Reconnect the battery negative terminal.
10. Test Drive: Take a short test drive to verify that the fuel system is working correctly.
Important Considerations:
* Fuel Line Material: Use fuel-resistant lines that meet the specifications for your truck. The wrong material can lead to leaks and failure.
* Fuel Line Fittings: Use the correct fittings for your fuel lines and connections.
* Clamps: Use appropriate clamps to secure the fuel lines.
* Professional Help: If you're not comfortable working with fuel systems, consider seeking professional help from a qualified mechanic. This is a job that could lead to serious injury or damage if not done correctly.
This is a general overview. Always consult your repair manual for specific instructions and safety precautions relevant to your 1984 Chevy pickup truck. Failing to do so could lead to injury or damage.
