How To Replace Coolant Expansion Tank on BMW E90 E91 E92 E93 See Description for bleeding procedure.

After installing new coolant tank please follow the steps:
1: fill it up with Dist. water/or 50/50 BMW coolant mix(depends on how much coolant was drained or lost.
2:Start the car, you can leave the filling cap open or bleeding screw. if your battery in good condition

You also can start the water pump bleeding procedure:
Ignition is on, without starting the car.
Acceleration pedal pressed all the way, and hold for 10sec, till you hear the water pump in action.
3-5min should be enough, keep adding the coolant if need it to hold the coolant level.

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