Replacing the coolant line from the cylinder head to the coolant expansion tank

WARNING: Working on 12 V electrical system.
Risk of short circuits! Risk of fire!

Make sure that there is no charger connected to the jump start terminal in the engine compartment.
Detach battery ground lead from battery.
For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.

WARNING: Hot fluids.
Risk of scalding!

Conduct all work in the vehicle wearing appropriate personal protective equipment only.

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
Follow notes for repair work on the cooling system.
For additional information see:
17 00... INSTRUCTIONS FOR REPAIR WORK ON COOLING SYSTEM

NOTE: TECHNICAL INFORMATION
Filling without the vacuum filling equipment (watering can filling) is not permitted.
Failure to observe this rule runs the risk of component damage/engine damage.
Filling specification absolutely must be adhered to.
It Is not permissible to operate the vehicle if the filling procedure has not been fully completed. Otherwise functional limitations (degradation) and/or overheating may result.
A bleeding procedure is required after a part has been exchanged in the cooling system and/or after refilling the cooling system.

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.

Preliminary work

Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
Refer to REMOVING THE ACOUSTIC COVER .
Refer to PARTIALLY REMOVING THE CHARGE AIR LINE .
Refer to REMOVING THE THROTTLE BODY .
Refer to REMOVING THE SERVOMOTOR FOR THE ECCENTRIC SHAFT .
Refer to REMOVING THE COVER ON LEFT AND RIGHT IN THE ENGINE COMPARTMENT AT THE TOP .
Refer to REMOVE BOTH FRONT-END STRUTS .
Refer to REMOVE FRONT CROSS CONNECTION .
Refer to REMOVE THE REAR TOP CROSS CONNECTION .
Refer to REMOVING THE FAN COWL .
Refer to REMOVE THE FRONT UNDERBODY PROTECTION OR FRONT THRUST FIELD .
Refer to REMOVING THE UNDERBODY PROTECTION OF THE STEERING GEAR AND THRUST FIELD RESPECTIVELY .
Refer to DRAIN THE COOLANT FROM THE HIGH-TEMPERATURE COOLING SYSTEM .
Refer to CONNECT THE COOLANT LINES FOR THE HIGH-TEMPERATURE COOLANT CIRCUIT .

Prerequisite

Battery ground lead is disconnected.

Keep a standard hook (1) ready.

Courtesy of BMW OF NORTH AMERICA, INC.
Loosen nut (1).
Thread out positive battery cable (2) and set it aside.

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock the clamp (2).
Release the coolant line (1) from the clamps (2).

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock the coolant line (2) with the hook (1).
Disconnect the coolant line (2) from the cylinder heed.
Catch and dispose of escaping coolant.

Courtesy of BMW OF NORTH AMERICA, INC.
Unlock the coolant line (1) and release it from the coolant expansion tank (1).
Release the coolant line (1) from the low-temperature coolant expansion tank (1).
Feed out the coolant line (1) under the intake plenum and remove it.
Replace the coolant line (1).
Feed in and install the coolant line (1) below the intake plenum.
Connect and audibly lock the coolant line (1) to the coolant expansion tank.
Securing the coolant line (1) on the tow-temperature coolant expansion tank (1).
Connect the coolant line (1) to the cylinder head end lock it audibly.

Courtesy of BMW OF NORTH AMERICA, INC.

Courtesy of BMW OF NORTH AMERICA, INC.
Attach the coolant line (2) with the clamp (1).

Courtesy of BMW OF NORTH AMERICA, INC.
Connect the positive battery cable (2) to the gas generator.

Tighten nut (1).

Tightening torques

Courtesy of BMW OF NORTH AMERICA, INC.

Positive battery cable to the alternator
M8	Tightening torque	19 Nm

Follow-up work

Refer to INSTALLING SERVOMOTOR FOR THE ECCENTRIC SHAFT .
Refer to INSTALLING THE THROTTLE BODY .
Refer to PARTIALLY INSTALLING THE CHARGE AIR LINE .
Refer to INSTALLING ACOUSTIC COVER .
Refer to INSTALL FAN COWL .
Refer to INSTALL THE REAR TOP CROSS CONNECTION .
Refer to INSTALL FRONT CROSS CONNECTION .
Refer to INSTALLING BOTH FRONT-END STRUTS
Refer to INSTALLING THE COVER ON THE LEFT AND RIGHT IN THE ENGINE COMPARTMENT AT THE TOP
Refer to FILL THE HIGH-TEMPERATURE COOLING SYSTEM WITH THE VACUUM FILLING EQUIPMENT
Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
Refer to VENT THE HIGH-TEMPERATURE COOLANT SYSTEM .
Refer to CHECK THE HIGH-TEMPERATURE COOLING SYSTEM FOR WATERTIGHTNESS .
Refer to INSTALLING THE UNDERBODY PROTECTION OF THE STEERING GEAR OR THE FRONT THRUST FIELD .
Refer to INSTALL THE FRONT UNDERBODY PROTECTION OR FRONT THRUST FIELD .
Refer to VERSION WITH ECCENTRIC SHAFT SERVOMOTOR: TEACHING IN THE END STOPS WITH THE DIAGNOSTIC SYSTEM