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Home >> BMW >> 2009 >> 650i 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 2055 (Cooling System - Repair (N63)) >> Coolant, Checking Cooling System >> 17...... Venting cooling system for intercooler (N63) >> Venting cooling system

Venting cooling system

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NOTE: Do not leave the coolant expansion tank cap open during the venting procedure.
  1. Add coolant up to top edge of expansion tank. Coolant must not drop any further! No drop in coolant for approx. 1 minute.
  2. Connect battery charger.
  3. Switch on ignition.
  4. Set heater to maximum temperature. Press "Automatic" button. Then reduce fan to lowest setting.
  5. Press accelerator pedal for 15 seconds to floor. Engine  must not  be started.
  6. The venting procedure is started when the accelerator pedal is pressed and takes approx. 12 minutes.
  7. Refill expansion tank up to top edge immediately after drawing off until empty.
  8. Adjust expansion tank to maximum level at end of venting process.
  9. Check cooling system for leaks.
  10. Close expansion tank.
  11. If the venting procedure has to be carried out again, allow DME to drop completely (ignition key removed for approx. 3 minutes), then repeat from Point 5.
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