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Old 02-05-2013, 08:02 PM
HerbP HerbP is offline
Officially Welcomed to the 'Fest
Location: Georgia
Join Date: Jul 2009
Posts: 5,094
Mein Auto: 2005 645Ci & 2007 750Li
If you are losing coolant, the expansion is most likely going to fail shortly! I would suggest changing the expansion tank, the bleed line, & the 0-ring for the coolant sensor. They can all be done within a hour. Overkill maybe, but the expansion tank will fail soon.

Good Luck!
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