Fuel Tank Leak Check

FUEL TANK LEAK CHECK

IMPORTANT:
- Before attempting this check, place a dry chemical (Class B) fire extinguisher near work area.

- Before removing the fuel tank for a suspected leak, make sure fuel pipes are not leaking onto the tank. Once removed, make sure fuel is not leaking around fuel sender assembly retainer, filler pipe and vent hoses, upper filler pipe assembly or fuel filler cap.

PROCEDURE
1. Relieve fuel system pressure. Refer to Fuel System Pressure Relief.
2. Drain fuel tank. Refer to Draining Fuel Tank.
3. Remove fuel tank. Refer to Fuel Tank Replacement.
4. Plug all outlets as follows:
a. Connect a piece of hose to the filler pipe nipple and plug opposite end.
b. Install fuel lever sender with new seal and plug fuel feed pipe and return pipe.
c. Connect a piece of hose to the tank vent valve and plug opposite end.
5. Connect a piece of hose to the vent pipe nipple.
6. Submerge tank in water or apply soap solution to outside of tank.
7. Apply 7 to 10 kPa (1 to 1.5 psi) air pressure to the hose on the fuel tank vent pipe nipple.

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