Note: Before starting work, the sensor should show that the tank is empty or almost empty. If you have to remove a full tank (for example, if the fuel pump is faulty), be sure to drain the remaining gasoline from the tank before starting work.
Warning: Gasoline is extremely flammable, so precautions should be taken when working on any part of the fuel system. Do not smoke, allow open flames or uninsulated lights in the work area.
1. Relieve the fuel pressure (see section 2).
2. Disconnect the wire from the negative battery terminal.
3. Raise the vehicle and support it securely on stands.
4. If there is fuel left in the tank, then before removing it, the fuel should be drained. It is pumped out through a special tube for filling the tank. Moreover, a small-diameter hose will be required, since this special tube has a check valve that prevents the release of fuel vapors when it is pumped out. In cars with fuel injection, there are additional reservoirs inside the tank that hold fuel at the pump intake during sharp maneuvers of the car or when its level is very low.
These tanks may prevent the hose from reaching the bottom of the tank, so the hose should be inserted into the tank several times.
5. Loosen the clamps of the hoses connected to the tank filler neck hose, as well as the tank vent valve hose (see figure), disconnect both hoses.
6. Place a floor jack under the tank, place a wooden shim between the jack heel and the tank. Raise the jack until it can support the weight of the tank.
7. Unscrew the bolts from the rear ends of the tank brackets. These brackets are hung from the front end, so they can be moved forward and removed so that they do not interfere.
8. Gently lower the tank, slightly turning it to the right, so that the approach to the exhaust pipe is free again (see figure). When you lower the gas tank so much that there is access to the fuel lines, the evaporator tube and electrical connectors, leave it in this position.
9. Pull out the electrical connector from the fuel pump power supply unit socket (see figure), disconnect the fuel supply system and return pipes from the fuel tank (see section 3). Disconnect the evaporative fuel tube from the vapor outlet. Once all connectors and tips are disconnected, remove the gas tank from the vehicle.
10. To replace the gas tank, clean it and repair it, see the information in section 5; also, on cars equipped with a carburetor, it is necessary to remove the sensor unit, and on cars with fuel injection, the fuel pump / sensor unit. Information regarding cleaning and repairing the gas tank is provided in section 6.
11. To install the fuel pump sensor unit, see section 7.
12. Assembly is carried out in reverse order.