Nissan Car Altima & Sentra 1999-06

Fuel Pump

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Relieve the pressure from the fuel system.
  4.  
  5. Remove or disconnect the following:
    NOTE
    When the fuel sending unit needs to be removed, pull the tab upwards. The tab is located on the sending unit, opposite the end of the float. After the tab is pulled, the sending unit will lift straight out of the tank bracket.



    Negative battery cable
     
    Rear seat and the access cover
     
    Fuel pump electrical connector
     
    Fuel lines from the fuel pump assembly
     
    Locking ring
     
    Fuel gauge assembly
     
    Fuel tube and connector from the fuel gauge
     



    Fuel pump by pinching the 2 locking tabs together. Lift the fuel pump assembly straight upward and out of fuel tank.
     
    O-ring and discard
     

  6.  
  7. Place a clean rag in the hole to keep out dirt.
  8.  

To install:

  1. Remove the rag
  2.  
  3. Install or connect the following:
    NOTE
    Verify that the mark on the fuel tank and the components are aligned when installing the pump and fuel gauge sending unit.



    New O-ring and fuel pump
     
    Electrical connection and fuel tube to the fuel gauge sending unit
     
    Fuel sending unit into the tank
     

  4.  
  5. If equipped with a threaded lock ring torque the ring to 22-26 ft. lbs. (30-35 Nm). If equipped with a lock ring held by six retaining screws, torque the screws to 18-22 inch lbs. (2-2.5 Nm).

    Fuel lines and fuel pump electrical connector. Always install new clamps on the fuel lines.
     
    Negative battery cable
     

  6.  
  7. Start the engine, check for leaks and repair if necessary.

    Fuel pump access cover
     
    Rear seat
     

  8.  

The fuel pump is located in the fuel tank on all vehicles. In-tank fuel pumps are accessible by lifting up the rear seat to gain access to the inspection cover.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove or disconnect the following:

    Negative battery cable
     
    Rear seat from the vehicle
     
    Inspection cover that is located under the rear seat
     
    Inlet and outlet fuel lines from the fuel pump assembly
     
    Fuel pump and gauge wiring connections
     
    6 mounting bolts that secure the fuel pump assembly to the top of the fuel tank
     

  6.  
  7. Raise up the fuel pump assembly and detach the fuel tubes and connector.

    Fuel gauge assembly
     
    Fuel pump with the fuel chamber
     

  8.  
  9. Pull up the front of the fuel pump chamber and slide the chamber forward.

    Fuel pump from the chamber
     
    O-ring seal or gasket
     

  10.  

To install:

  1. Install or connect the following:

    Fuel pump to the fuel pump chamber and slide chamber rearward
     
    Fuel pump with the fuel pump chamber
     
    Fuel gauge assembly using a new O-ring
     
    Fuel tubes and connector. Use new hoses and clamps.
     
    6 mounting bolts to the top of the fuel gauge unit and torque the bolts to 18-22 inch lbs. (2-2.5 Nm)
     
    Fuel pump and gauge wiring connections
     
    New inlet and outlet fuel lines to the fuel pump assembly
     
    Negative battery cable
     

  2.  
  3. Start the vehicle, check for leaks and repair if necessary.

    Inspection cover and the rear seat
     

  4.  

 
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