Fuel Tank Draining
Fuel tank, draining
Special tools:
999 5720 Wrench 999 5720 Wrench
999 5721 Adapter 999 5721 Adapter
999 7314 Spanner 999 7314 Spanner
Note! As the illustrations in this service information are used for different model years and/or models, some variation may occur. However, the essential information in the illustrations is always correct.
Preparation
Disconnect the battery negative terminal. See Battery, disconnecting Battery Disconnecting.
Warning! RISK OF EXPLOSION!!! THE USE OF A FRESH AIR MASK IS RECOMMENDED.
Note! Before draining the fuel, see: Safety regulations for handling fuel Safety Regulations for Handling Fuel.
Drain the fuel lines. See: Fuel system, draining Fuel System, Draining
Insert the heavy duty hose 1.3 meters into the fuel filler pipe, measured from the edge of the opening of the filler pipe.
Pump until air comes out.
Remove the outer rear seats. See Upholstery backrest cushion outer (second row) Upholstery Backrest Cushion Outer (Second Row). Remove the center rear seat. See Upholstery backrest cushion center (second row), replacing Upholstery Backrest Cushion Center (Second Row), Replacing.
Fold the carpet back.
Remove:
- ventilation pipe (1), only applies to 7-seater vehicles
- the insulation block (2)
- the insulation block (3).
Removing the cap over the level sensor
Remove the covers (1.2) over the fuel tank units.
Remove the hoses from the right-hand level sensor.
Cover the area around the combined tank unit and between the doors with absorbent material.
Caution! Make sure dirt does not enter the fuel tank.
Draining the fuel tank
Special tools: 999 5720 Wrench 999 5720 Wrench.
Clean and remove all dirt from the right and left-hand combined tank units.
Remove the screw on the fuel pump. Insert the heavy duty hose and suck out the remains from the bottom of the right-hand side of the fuel tank.
Connect hose 999 5721 Adapter 999 5721 Adapter to the heavy duty hose. Suck out the remains from the bottom of the level sensor reservoir.
Carefully remove the overflow pipe from the reservoir.
Remove the thin hose 999 5721 Adapter 999 5721 Adapter from the heavy duty hose. Connect the thin hose to the overflow pipe. Use a hose clamp.
Pump until a lot of air comes out.
Open the left-hand level sensor, use wrench 999 7314 Spanner 999 7314 Spanner. Insert the heavy duty hose and suck out the remains from the bottom of the left-hand side of the fuel tank.
Installing the right-hand level sensor
Place the overflow pipe approximately half a centimeter to the left-hand side.
Grip around the right level sensor reservoir. Pinch the level sensor reservoir so that the float is held in its lowest position.
Lower the reservoir carefully while rotating it backwards around the front-rear shaft on the float.
Install the overflow pipe on the reservoir.
Installing the left-hand level sensor
Install a new O-ring, lubricated with lubricant, P/N 1161580.
Push down the left-hand level sensor so that the raised rectangular section on the level sensor runs along the car.
Check that the O-ring is not trapped.
Tighten the screw to 60 Nm. Use wrench 999 7314 Spanner 999 7314 Spanner.
Wipe up any fuel spillage.
Position the wiring in the cut-out in the rubber ring
Note! Check that the arrow on the cover is between the markings on the tank. If the arrow is outside the markings the fuel gauge sensor will give an incorrect value and the float may catch against the inner wall of the tank. If not: Slacken off the screw and adjust the position of the sensor. Tighten as above.
Right-hand level sensor, continued
Install a new O-ring, lubricated with lubricant, P/N 1161580.
Press the right-hand level sensor down so that the fuel line connections are pointing forwards and to the right.
Check that the O-ring is not trapped.
Tighten the screw to 60 Nm. Use wrench 999 5720 Wrench 999 5720 Wrench.
Install the hoses on the level sensor.
Wipe up any fuel spillage.
Position the wiring in the cut-out in the rubber ring.
Note! Check that the arrow on the cover is between the markings on the tank. If the arrow is outside the markings the fuel gauge sensor will give an incorrect value and the float may catch against the inner wall of the tank. If not: Slacken off the screw and adjust the position of the sensor. Tighten as above.
Install on both sides:
- the wiring in the sockets on the rubber seal
- the cover over the level sensors and tighten the nuts to 6 Nm.
Connect the wiring and the connectors.
Fold the carpet down
Install:
- the center rear seat. See Upholstery backrest cushion center (second row), replacing Upholstery Backrest Cushion Center (Second Row), Replacing
- the outer rear seat. See Upholstery backrest cushion outer (second row) Upholstery Backrest Cushion Outer (Second Row).