Here's a general outline. Specific steps and procedures might vary slightly depending on your exact model and trim level. Always consult a repair manual specific to your 1998 Buick Riviera for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
1. Preparation:
* Safety First: Work in a well-ventilated area. Avoid sparks or flames. Have a fire extinguisher nearby.
* Gather Tools: You'll need jack stands, jack, socket wrenches (various sizes), possibly a fuel line disconnect tool, a fuel pump pliers (or a suitable alternative for the retaining ring), screwdrivers (Phillips and flathead), possibly a torque wrench, safety glasses, gloves, rags, and a new fuel pump (ensure it's the correct one for your vehicle).
* Disconnect the Battery: Disconnect the negative (-) battery cable first.
* Reduce Fuel Pressure: You need to relieve pressure in the fuel system. This is usually done by starting the car and letting it run until it stalls (after the fuel pump runs dry), or by using a fuel pressure release valve (check your repair manual for location). This prevents fuel from spraying everywhere when you disconnect the lines.
2. Accessing the Fuel Pump:
* Locate the Fuel Pump Access Panel: This is usually located in the trunk, under the rear seat, or under the car (depending on your specific model). Your repair manual will pinpoint the location. You'll likely need to remove some interior trim or carpeting to gain access.
* Remove Access Panel: Once located, carefully remove the access panel.
3. Removing the Old Fuel Pump:
* Disconnect Fuel Lines: Carefully disconnect the fuel lines. Use a fuel line disconnect tool to avoid damaging the lines. Have rags ready to absorb any spilled fuel.
* Disconnect Electrical Connectors: Disconnect the electrical connectors leading to the fuel pump.
* Remove the Fuel Pump Assembly: This involves removing a retaining ring or clamp that holds the pump assembly in place. This might require a fuel pump pliers or other specialized tools. Be careful not to damage the fuel tank itself.
* Remove the Pump from the Assembly: Once the assembly is out, you'll need to separate the pump from its housing. This varies depending on the design; your repair manual will be essential here.
4. Installing the New Fuel Pump:
* Install the New Pump into the Assembly: Reverse the process of removing the old pump.
* Install the Assembly into the Fuel Tank: Carefully lower the new fuel pump assembly back into the tank, ensuring it's seated correctly. Secure the retaining ring or clamp.
* Reconnect the Electrical Connectors: Reconnect the electrical connectors to the fuel pump.
* Reconnect the Fuel Lines: Carefully reconnect the fuel lines. Double-check for secure connections and no leaks.
5. Finishing Up:
* Replace Access Panel: Put the access panel back in place.
* Reconnect the Battery: Reconnect the negative (-) battery cable.
* Prime the Fuel System: You might need to prime the fuel system. Your repair manual will tell you how, often involving turning the ignition key several times without cranking the engine to build up fuel pressure.
* Check for Leaks: Check carefully for any fuel leaks around the fuel lines and connections.
* Start the Engine: Start the car and listen for unusual noises. Check for any warning lights. Let the car run for a few minutes to ensure everything is working correctly.
Important Considerations:
* Repair Manual: A repair manual is absolutely essential. These instructions are a general overview, and the specifics will vary based on your vehicle.
* Fuel Pump Selection: Make sure you buy the correct fuel pump for your 1998 Buick Riviera.
* Professional Help: If you're not comfortable with this type of repair, it's best to take your car to a qualified mechanic. Replacing a fuel pump incorrectly can be dangerous and costly.
This information is for guidance only. Always consult a repair manual specific to your vehicle before attempting this repair. Improper repair can lead to serious injury or damage to your vehicle.
