How to Clean the Fuel Tank Before Replacing the Fuel Pump

Want your new fuel pump to last? Clean your fuel tank first.

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Before installing a new fuel pump, it’s critical to properly clean the gas tank. Debris in your gas tank will damage your new fuel pump. And the time it takes to clean out the debris – about an hour – is nothing compared to the time it takes to redo the entire job. So save yourself time, hassle and money – clean the tank before you replace the fuel pump.

It is critical to properly clean the fuel tank before installing a new fuel pump. The original pump went into a clean tank, so to ensure the same level of performance, the new one should go into a clean tank too.


Protect the Pump – How to Clean the Fuel Tank Before Replacing the Fuel Pump

Delphi How-To Video Series

  • Clean rust and debris from the exterior of the fuel tank.
  • Remove lines from the fuel pump.
  • Remove fuel pump.
  • Siphon fuel from the tank.
  • Swirl the gas tank. Pour out remaining gas and debris.
  • Clean the tank interior with a low-suds soap and water mixture. *We recommend the Delphi Fuel Tank Cleaning Kit (FC01).
  • Dry tank with compressed air.
  • Wipe out tank with lint-free towel.
  • Rinse tank interior with water.
  • Drain the water.
  • Let tank dry for 30 minutes.

Safety First

  • Have a fire extinguisher nearby.
  • Never smoke or work near anything that could cause a spark or ignite fuel, such as pilot lights and incandescent light bulbs.
  • Always wear safety glasses, and gloves are recommended.
  • Work in a well ventilated area. Keep clean-up materials on hand and clean up any spills immediately.
  • Always relieve fuel pressure prior to opening fuel systems. Releasing fuel under pressure can cause fire and injury.
  • Store fuel in an approved container like a gas caddy or gas can.