View Single Post
      02-09-2012, 02:53 PM   #3
Eleven Bravo
mike3000fl's Avatar
Drives: 06 330i
Join Date: Feb 2010
Location: ft bragg

Posts: 2,171
iTrader: (0)

It supposedly is a sealed system but at the same time I have heard that it is not. I believe the consensus is that it should not lose fluid. I do know that our expansion tank is under pressure which is different to many cars where the expansion tank is a plastic bottle like the wiper fluid (flip cap and all).

I top mine up every other month or so, not much loss, dipstick is just a bit lower.
2006 330i - Jet Black - 19" E46 M3 wheels - HR Sport - 199,000 Miles...

mike3000fl is offline  
Reply With Quote