How to get oil out of cooling system

[Tyx]

Two weeks ago my 320d got oil mixed up with water in the expansion tank due to a leaking oil cooler.
This was replaced and the cooling system flushed but there is still traces of oil left in the water.
The mechanic flushed the system a view times. Even put in some degreaser.
Is there perhaps something else I can use to get rid of all the oil.

Happy to have the car back on the road but still a bit worried about the oil that can influence the cooling.

 

[XMAX]

unfortunately the only way to sort out the oil issue is to flush the system multiple times.


I had the same issue with my previous 330D. the only way the car was sorted was with about 5 flushes of the system.