The fuel tank in the E39 (M57) and E38 (M57, M67) has been adopted from the relevant M51TÜ version.
Two outlet protection valves in the tank prevent fuel from escaping in the event of a crash (e.g. vehicle rolling over).
Advance delivery pump
The electrical fuel pump (EFP) is located inside the fuel tank in the right side of the tank.
The EFP transports fuel from the fuel baffle towards the “engine” and operates the sucking jet pumps in the left and right sides of the tank. Both sucking jet pumps deliver fuel to the fuel baffle in the right side of the tank.
The pump is activated by the control unit via the EFP relay (see DDE).
Auxiliary delivery pump
The auxiliary delivery pump has the task of providing the high pressure pump (HPP) with an adequate amount of fuel:
• In every operating condition
• At the required pressure
• Over the entire service life
In the M57 and M67, different auxiliary delivery pumps are employed.
