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Home >> BMW >> 1997 >> 740iL >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> FUEL SUPPLY SYSTEM - REPAIR INSTRUCTIONS - 740i & 740iL >> Fuel Pick Up Cleaning >> 16 00 005 Draining and filling fuel tank

16 00 005 Draining and filling fuel tank

CAUTION: Observe relevant country safety legislation and regulations!

Ensure adequate ventilation in the place of work!

Connect the exhaust and extraction systems to the exhaust tailpipe.

The electric fuel pump must not operate without fuel! After servicing before the first engine start-up, fill the fuel tank via the fuel filling line with at least 5L of fuel.

NOTE: The fuel tank has two tube necks for draining off fuel.

The right neck, facing in direction of travel, leads into inside of tank to right side of tank.

Both tube necks are linked together with a section of hose which seals them from outside.

Fig 1: Identifying Fuel Tank
G03225307

Remove left stone chip guard.

Unfasten both connections with special tool 13 3 010.

Fig 2: Unfastening Both Connections With Special Tool 13 3 010
G03225308

Sever fuel hose in the center.

Fig 3: Severing Fuel Hose In Center
G03225309

Connect suction unit to a hose section with an adapter.

Fig 4: Connecting Suction Unit
G03225310

Remove special tool 13 3 010.

- fuel flows into container -

NOTE: Drain second half of tank in same manner.
CAUTION: Even when only working on one side of tank, both halves of tank must be drained.

Remove both hose sections and replace with a new fuel hose.

Fig 5: Identifying New Fuel Hose
G03225311