Coolant: Service and Repair

17 00 005 - Draining and topping up coolant





Warning!
Danger of scalding!
Work on the cooling system should only be carried out on an engine that has cooled down!





Important!
Wear protective gloves and goggles.





Recycling:
Catch and dispose of drained coolant.
Comply with the waste disposal regulations applicable in the relevant countries.





Note:
Follow instructions for working on cooling system Instructions For Working on Cooling System.
After adding coolant, vent cooling system and check for leaks.
Refer to Venting cooling system and checking for leaks.





Draining coolant:
Unscrew pressure relief cap (1) from filler neck.





Remove underbody protection Service and Repair.
Disconnect lower hose connection on radiator (1).
Drain, catch and dispose off coolant.





Release connection of heater hose (1).
Drain, catch and dispose off coolant.





Release vent screw (1) in heating distributor pipe.





Release vent screw (1) in upper radiator hose.
The cooling system is vented during filling.





Adding coolant:
Pour in coolant at filler neck (1).
Tighten down vent screws as soon as coolant emerges.
Tightening torque 17 00 1AZ [1][2]17 00 Coolant System Components.
Pour in coolant at filler neck until level reaches lower sealing surface (no bubbles visible).





Fill expansion tank up to maximum level (1).

Start engine and run at idle; top up coolant at filler neck if level drops.
Continue running engine until liquid level stops dropping.
Switch off engine.
Top up coolant at filler neck to lower sealing surface.
Top up expansion tank to maximum level (if necessary).





Note:
Before filling, turn on ignition and set heating control to maximum temperature.
Set fan to sow setting.
Pour in coolant slowly.
Use only recommended coolant, refer to BMW Operating Fluids in Main Group 17.