Venting cooling system
WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Do not leave the coolant expansion tank sealing cap open during the bleeding procedure.
Ensure that both cooling circuits are filled before starting the automatic bleeding procedure. The bleeding procedure is automatically started simultaneously for both cooling circuits. If the bleeding processes is started while one of the cooling circuit is empty, there is a risk of damage to the coolant pump from running it dry.
Switch on the low-beam headlights to perform the bleeding procedure. If the low-beam headlights are not switched on, the ignition (Terminal 15) will switch off automatically after a certain period of time and interrupt the bleeding procedure.
- Open vent plugs on coolant feed lines to turbocharger.
- Add coolant to the upper edge of the expansion tank. The coolant level must no drop. No drop in coolant for approx. 1 minute. Close the bleeder screws of the exhaust turbocharger when coolant emerges.
- FES (driving experience switch) must not be in ECO PRO!
- Set heating to maximum temperature. Press the automatic button. Then reduce the blower to the smallest level for a minimum time of 5 minutes.
- After the heating pump is switched off, continue adding coolant to the upper edge of the expansion tank.
- Check COOLING SYSTEM for leaks.
- Close expansion tank.
- Start engine. Let the engine idle for approx. 1 minute. During this time, press on accelerator 3 times for 5 seconds each time to approx. 3000 RPM.
- Warm up engine and activate map thermostat via BMW diagnosis system.
- When engine has cooled down, check coolant level and adjust to maximum.
Close coolant expansion tank.
Installation note:
Close the sealing cap (1) of the expansion tank (2) to the point where the arrows align.