[Mullins]

A week later, after having my gaskets replaced, my coolant tank is back to being brown. Not sure if this could be residual, or if something worse/else is going on... I really hope BMW Service covers this.


Edit: Turned out it was just residual oil, but a significant amount. They flushed the system 3 more times with test drives/run time between to get more out. I wouldn't be surprised if more shows up over time, considering I'm not really sure how long it was contaminated for. Thankfully this was covered by the original service.