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Old 10-06-2018, 01:53 PM   #3
Certified Boxster Addict
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,661
Participation or precipitation?

You don't need to worry about the time (~1 hour) that the fluid is exposed to the air (whether humid/rainy or dry) during the flush and bleeding procedure.

You do need to worry if you left the reservoir cap off for a week.
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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