Fuel Tank: Testing and Inspection

Important
^ Before attempting "Fuel Tank Leak Check" place a dry chemical (Class B) fire extinguisher near work area.
^ Before removing the fuel tank for a suspected leak, make sure fuel lines are not leaking onto the tank. Once removed, make sure fuel is not leaking around fuel sender assembly O-ring.
^ This check requires a fuel sender assembly and O-ring to be installed in the fuel tank

1. Relieve fuel system pressure (see applicable 'Fuel System Pressure Relief" procedure(
2. Drain fuel tank (see "Draining Fuel Tank").
3. Remove fuel tank (see "Fuel Tank Replacement").
4. Cap fuel feed pipe, fuel return pipe and vapor pipe on fuel sender assembly.
5. Plug fuel filler neck opening.
6. Connect a piece of hose to the vent pipe.
7. Submerge tank in water or apply soap solution to outside of tank.
8. Apply 7 to 10 kPa (1 to 1-1/2 psi) air pressure to the piece of hose on the fuel tank vent pipe.
^ Air bubbles appearing from fuel tank indicate a leak. Replace fuel tank if it is leaking (see "Fuel Tank Replacement").