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17 00 039 Venting cooling system and checking for watertightness (N54)

WARNING: Risk of scalding!
Open sealing cap only after engine has cooled down.
IMPORTANT: Electric coolant pump!
FOLLOW NOTES FOR CARRYING OUT REPAIR WORK ON THE COOLING SYSTEM .
IMPORTANT: Lifetime coolant filling: 
Never 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 drained and refilled.
In the case of other removal work involving the draining of part quantities of coolant, replace these quantities which have been drained with new coolant.

Only when refilling! 

Use only RECOMMENDED COOLANT AND MIXTURE RATIO .

Perform filling operation slowly.

Adjust coolant level to MAX.

Fig 1: Identifying Coolant Level Maximum Mark And Minimum Mark
G09858930Courtesy of BMW OF NORTH AMERICA, INC.

Close coolant expansion tank.

Installation note: 

Close the sealing cap (1) until the arrows line up.

Fig 2: Identifying Alignment Marks For Closing Sealing Cap
G09858931Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: The following bleeding procedure is necessary e.g. when a part is replaced in the cooling system or when the cooling system is refilled.

Vehicles with independent heating only 

Open bleeder screw (1).

Slowly fill coolant expansion tank with RECOMMENDED COOLANT .

Close bleeder screw (1) after coolant emerges.

Installation note: 

Have a cleaning cloth ready and mop up emerging coolant.

Fig 3: Identifying Bleeder Screw
G09858932Courtesy of BMW OF NORTH AMERICA, INC.

Adding coolant 

NOTE: Open bleeder screw (1).

Fill coolant expansion tank up to lower edge of filler neck. Use only RECOMMENDED COOLANT AND MIXTURE RATIO .

Close bleeder screw (1).

Close cap on expansion tank.

Fig 4: Identifying Bleeder Screw
G09858933Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Have a cleaning cloth ready and mop up emerging coolant.

Only when venting! 

NOTE: Do not open the coolant expansion tank cap during the bleeding procedure.
  1. Connect battery charger.
  2. Switch the ignition on.
  3. Set heater to maximum temperature and turn blower down to lowest speed.
  4. Press accelerator pedal for 10 seconds to floor. Engine  must not  be started.
  5. The bleeding procedure was started by pressing the accelerator pedal and takes approx. 12 min. (the electrical coolant pump was activated and switches off automatically after approx. 12 min).
  6. Then top up fill level in coolant expansion tank with 100 ml above MAX (see illustration).
  7. CHECK COOLING SYSTEM FOR WATERTIGHTNESS .
  8. If venting has to be carried out again (e.g. if cooling system is leaking), allow DME to fall completely (leave ignition key removed for approx. 3 min), then repeat from Point  3.

Only when venting! 

Perform filling operation slowly.

Fill coolant expansion tank with 100 ml above MAX.

100 ml corresponds to A=6 mm.

Fig 5: Identifying Filling For When Venting
G09858934Courtesy of BMW OF NORTH AMERICA, INC.

Close coolant expansion tank.

Installation note: 

Close the sealing cap (1) until the arrows line up.

Fig 6: Identifying Alignment Marks For Closing Sealing Cap
G09858935Courtesy of BMW OF NORTH AMERICA, INC.
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