BMW 16116752552 Plastic Fuel Tank

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During the process of draining the fuel tank one should use a safe storage container as well as a fuel pumping equipment which has been certified. Switch the iron on and let the engine run for about 10 to 15 seconds to allow the fuel compensating siphon assembly to fill to facilitate drawing the contents of both lobes of the fuel tank through the fuel filler pipe. Remove the negative cable from the battery without fail while reading the battery disconnection cautions first. Twist the suction hose to withdraw fuel into the storage unit while the fuel tank filler cap is removed and the hose inserted into the filler neck to about 130 cm (51 inches). The fuel level reduction in both lobes should be checked; do this by removing the rear seat cushion to reveal both fuel tank sender harness connectors. Tester should use the multimeter to measure the resistance at both senders and expect the resistance to go down as the fuel level goes down. That if the siphoning mechanism was found to be faulty the left tank lobe having been separated should be drained by removing the sender cover and pumping the fuel directly out of the left lobe. When disconnecting the suction hose from the tank filler neck be cautious not to damage the filler neck baffle plate. Care should be taken to ensure there are at least 5 litres (1.5 US gallons) of fuel in the tank before starting the engine as operation of the fuel pump without fuel in the tank is detrimental to it.

Look for fuel leaks in the engine compartment or any fuel odors in the passenger compartment.

Support the fuel tank with a suitable jack, ensuring the retaining straps are not covered, then remove the fasteners from the right, left, and center fuel tank retaining straps, unhook the straps, and remove them while ensuring the fuel tank remains balanced on the jack. Carefully lower the fuel tank approximately 20 cm (8 in) and feed the expansion tank hoses through the opening in the right rear wheel well arch.