NONRETURN Valve Inspection [MZI-3.7]
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.
WARNING:
- Fuel is very flammable liquid. If fuel spills or leaks from the pressurized fuel system, it will cause serious injury or death and facility breakage. Fuel can also irritate skin and eyes. To prevent this, always complete the "Fuel Line Safety Procedure", while referring to the "BEFORE SERVICE PRECAUTION".
- Follow "BEFORE SERVICE PRECAUTION" before performing any work operations to prevent fuel from spilling from the fuel system. See BEFORE SERVICE PRECAUTION [MZI-3.7] .
- Disconnect the negative battery cable.
- Remove the fuel pump unit. See FUEL PUMP UNIT REMOVAL/INSTALLATION [MZI-3.7] .
- Siphon the fuel from the fuel tankNOTE:
- Nonreturn valve is integrated in the fuel tank.
- The nonreturn valve is normally closed by the spring force.
- Verify the nonreturn valve operation using a mirror.
- Verify that the nonreturn valve is closed
- If malfunction, replace the fuel tank. See FUEL TANK REMOVAL/INSTALLATION [MZI-3.7] .
- Verify that the nonreturn valve is not stuck open and does not open even when pulled up by a finger.
- If malfunction, replace the fuel tank. See FUEL TANK REMOVAL/INSTALLATION [MZI-3.7] )