Fuel Tank Inspection [L5]

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The rollover valve and the fuel shut-off valve built into the fuel tank are inspected in this inspection.

Remove the connector and the fuel hose from the fuel pump unit. See FUEL PUMP UNIT INSPECTION [L5]. )
Remove the fuel tank with the fuel pump unit and fuel suction pipe bracket still installed. See FUEL TANK REMOVAL/INSTALLATION [L5]. )
Perform the following procedure to verify the fuel tank airtightness.
1. Plug the fuel pump unit pipe, ports B and C.
2. Apply a pressure to port A and wait for a while.
3. Verify that there is no air flow leakage from the fuel tank.
- If there is air flow, replace the fuel tank. See FUEL TANK REMOVAL/INSTALLATION [L5]. )
Fig 1: Locating Plug Fuel Pump Unit Pipe And Ports
Courtesy of MAZDA MOTORS CORP.
Plug the fuel pump unit pipe and port B.
Level the fuel tank.
Apply a pressure to port A and wait for a while.
With the pressure still applied, verify that there is air flow port C and the pressure.
- If there is no air flow, replace the fuel tank. See FUEL TANK REMOVAL/INSTALLATION [L5] )
- If there is air flow, place the fuel tank upside down.
Fig 2: Locating Plug Fuel Pump Unit Pipe And Ports
Courtesy of MAZDA MOTORS CORP.
Apply a pressure to port A and wait for a while.
With the pressure still applied, verify that there is no air flow from port C.

If there is air flow, replace the fuel tank. See FUEL TANK REMOVAL/INSTALLATION [L5] )

Fig 3: Identifying Plug Fuel Pump Unit Pipe And Ports

Courtesy of MAZDA MOTORS CORP.