Fuel Tank: Testing and Inspection

FUEL TANK LEAK CHECK

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

PROCEDURE
1. Disconnect negative battery cable.
2. Relieve fuel system pressure. Refer to Fuel System Pressure Relief Procedure. Fuel System Pressure Relief Procedure
3. Drain Fuel Tank. Refer to Draining Fuel Tank. Fuel Tank Draining Procedure
4. Remove fuel tank. Refer to Fuel Tank/Service and Repair. Fuel Tank Replacement
5. Cap fuel feed pipe and vapor pipe on fuel sender assembly.
6. Connect a piece of hose to the filler pipe nipple and plug opposite end.
7. Submerge tank in water or apply soap solution to outside of tank.
8. Apply 35 kPa (5 psi) air pressure to the vent hose on the fuel tank.

INTERPRETING TEST RESULTS
Air bubbles appearing from fuel tank indicate a leak. Replace fuel tank if it is leaking. Refer to Fuel Tank Replacement.