View Single Post
      01-31-2013, 04:01 PM   #34

Z K's Avatar
Drives: E90 M3
Join Date: Jul 2011
Location: San Francisco

Posts: 2,152
iTrader: (3)

Originally Posted by Maximusdafarmer View Post
Is it overkill to do this swap, let it circulate for about and week and do it again to try to flush as much of the old fluid as possible? Or is the amount left in the system without actuating the pump really not of any concern? Sorry if this is a dumb question, but this is a new area of DIY maintenance for me.
The amount left over is too small to need to change the system again. You can say the same about motor oil.. there is always some old oil left over after changing but no one changes it twice.