Draining and adding coolant M47, M47TU engines
17 00 005
Warning! Danger of scalding! Only perform this work after engine has cooled down.
Caution! When working on the oil, coolant or fuel circuit, you must protect the alternator against contamination. Cover alternator with suitable materials. Failure to comply with this procedure may result in an alternator malfunction.
Recycling Catch and dispose of drained coolant. Observe country-specific waste-disposal regulations.
Note: Follow instructions for working on cooling system, refer to 17 00 … Once the coolant has been added, the cooling system must be vented and leak-tested, refer to 17 00 039.
Draining coolant: Remove cap (1) on expansion tank.
Remove front underbody protection. Grip adjusting screw (2) and undo drain plug (1) on radiator at bottom. Drain, catch and dispose of coolant. Installation: Replace sealing ring. Observe Tightening Torque, refer to 17 11 2AZ.
Undo drain plug (1) on exhaust side of engine block. Drain, catch and dispose of coolant. Installation: Replace sealing ring. Observe Tightening Torque, refer to 11 11 5AZ.
Adding coolant: Slacken vent plug (1) on radiator feed.
Release screws (1) and remove acoustic panel (2).
Slacken vent plugs (1/2): 1) Vent plug on EGR cooler thermostat. 2) Vent plug on heating return pipe.
BMW Engine M47 only: Release vent plug (1) on auxiliary heater.
Air conditioning / air conditioning control Slacken vent plug (1) on heating feed.
Note: When adding coolant, it is absolutely essential to adhere to the following sequence: 1) Remove cap from expansion tank (ET) 2) Open all vent plugs: Radiator feed – ET branch piece Coolant return pipe EGR cooler thermostat Heating cooler feed 3) Add coolant slowly. 4) Close vent plugs on coolant return pipe and on radiator feed (ET branch piece) after coolant emerges 5) Fill ET with coolant up to edge 6) Close vent plugs on EGR cooler thermostat and on heating cooler feed (no emergence of coolant during filling procedure) 7) Start engine (idling), set heater to maximum and fan to low stage (if necessary, top up coolant to max. fill level) 8) Close ET cap, press accelerator pedal several times up to approx. 2500 rpm 9) Remove ET cap and if necessary top up coolant to max. cold fill level 10) Run engine at idle for approx. 5 minutes with open ET (until bubble-free coolant can be seen to emerge in ET); if required, top up coolant to max. cold fill level 11) Close ET cap. Note: Use only recommended coolant, refer to BMW Service Operating Fluids in Main Group 17.