Remove the coolant expansion tank for the low-temperature coolant circuit

WARNING: This page is about a different car, the 2022 BMW X7, 2021 BMW X7, 2020 BMW X7, and 2019 BMW X7. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Hot surfaces .
Risk of burning!

Perform all work only on components that have cooled down.

NOTE: RISK OF DAMAGE
Careless handling of tools and sharp-edged components .
Scratches, surface damage .

Protect working area.
Handle tools and components carefully.

NOTE: TECHNICAL INFORMATION
When the engine is stopped after the completion of trip, it may be necessary to run the electric fan. In rare cases, operation of the electric fan can last up to 11 min. This protects the components. In this case, replacing the electric fan will not remedy the problem!

Preliminary work

Refer to REMOVING THE TOP RIGHT AND LEFT COVER IN THE ENGINE COMPARTMENT .
Refer to REMOVING UPPER CROSS CONNECTION .
Refer to REMOVING THE TENSION STRUT AT THE SHOCK TOWER ON THE LEFT AND RIGHT .
Refer to REMOVING THE ACOUSTIC COVER .
Refer to REMOVING BOTH INTAKE FILTER HOUSINGS .
Refer to REMOVING THE UNFILTERED-AIR DUCT ON THE RIGHT AND LEFT .
Refer to REMOVING THE REAR TOP CROSS CONNECTION .
Refer to REMOVING FAN COWL .
Refer to REMOVING THE FRONT UNDERBODY PROTECTION .

Disconnect tool

Courtesy of BMW OF NORTH AMERICA, INC.

Use standard disconnection tools to disconnect the coolant hoses or vacuum lines.

CAUTION: Materials harmful to health .
Contact with fluids harmful to health!

Note and follow safety instructions on containers.
Conduct all work in appropriate personal protective equipment only.

NOTE: TECHNICAL INFORMATION
Immobilization period-long fill of coolant!
Do not reuse used coolant.
When replacing and removing components which rely on the corrosion protection effect of the coolant, it is essential to change the coolant. The cooling system must therefore be emptied and refilled.
In the case of other removal work involving the draining of part quantities of coolant, the coolant level must be topped up with new coolant.

NOTE: TECHNICAL INFORMATION
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

Open the lid (1) on the coolant expansion tank of the charge air coolers.
Draw the coolant off with a conventional pump .

Courtesy of BMW OF NORTH AMERICA, INC.
Release the cable (1) from the coolant expansion tank for the low-temperature coolant circuit and put to one side.
Disconnect the tank vent line (2) from the coolant expansion tank for the low-temperature coolant circuit and lay onto one side.
Release the coolant line (3) from the coolant expansion tank for the low-temperature coolant circuit and put to one side.

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: TECHNICAL INFORMATION
Use commercially available pinch-off tools to pinch off the coolant hoses.
Disconnect the coolant hoses (1), (2) and (3) with conventional disconnection tools.
Unlock the coolant hose (1) and detach from the coolant expansion tank for the low-temperature coolant circuit.
Unlock the coolant hose (2) and detach from the coolant expansion tank for the low-temperature coolant circuit.

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock the coolant hose (3) and detach from the coolant expansion tank for the low-temperature coolant circuit.
Unlock each lock (1) in the direction of the arrow.
Release and remove the coolant expansion tank (2) for the low-temperature coolant circuit from the holder.

Courtesy of BMW OF NORTH AMERICA, INC.