How to Remove the Fuel Pump on a Buick 3.8 Liter V6 Engine

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The fuel pump in a Buick Century with a 3.8 liter V6 engine is located in the fuel tank. Accessing the fuel pump requires removing the fuel tank and pulling the pump out from the tank. The pump is electric and when the pump burns out, replacing the pump is mandatory. Once the pump is pulled out from the tank, flush and clean the fuel tank for maximum efficiency on the fuel system when the car is running.

Things You'll Need

  • Jack
  • Jack stands
  • Socket wrench
  • Socket set
  • Flat tip screwdriver
  • Hammer
  • Park the car on a flat and level surface. Ensure the front wheels are chocked from the front of the car.

  • Place a jack under the rear axle beam and raise the car up to make more room to work. Place jack stands under both sides of the vehicle under the axle beam. Lower the car on to the jack stands.

  • Locate the fuel tank under the trunk of the car. The fuel tank has two straps holding the tank in place.

  • Place the jack underneath the fuel tank. Raise the jack up to the fuel tank. This will make removing the fuel tank easy when the straps are removed.

  • Unbolt the straps with a socket wrench. The straps have two bolts per strap.

  • Lower the tank slightly to access the fuel hoses at the top of the tank. Unscrew the hose clamps with a flat tip screwdriver. Disconnect the electrical connectors and the vacuum hoses.

  • Unscrew the hose clamp on the fuel filler hose at the back of the tank. Pull the hose off the back of the tank.

  • Lower the tank down to the ground. Pull it out from under the car.

  • Tap the protruding tabs at the top of the tank counterclockwise with a flat tip screwdriver. Push the retaining ring until it is freed from the tank.

  • Pull the fuel pump out of the tank by pulling it up. Remove at an angle to clear the float at the bottom of the pump assembly.

Tips & Warnings

  • The fuel pump is attached to an assembly that includes the fuel sending unit.
  • Use caution working around the fuel system, as gasoline is highly toxic and flammable.

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References

  • "Buick Century, Chevrolet Celebrity, Oldsmobile Ciera/Cutlass Cruiser and Pontiac 6000 Haynes Repair Manual for 1982 thru 1996 covering front wheel 2WD gasoline engine models'; John Haynes;1996
  • Photo Credit pumping gas image by Mat Hayward from Fotolia.com
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