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Any ideas what this residue is?

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Old 07-04-2017, 12:57 PM
  #16  
worf928
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Washer tanks are (as far as I know) vented so as to allow for thermal expansion of the fluid. Overfilling to the point of overflow will (usually) cause some fluid to drain through the vent mechanism.

Spirited driving and the resultant sloshing of the fluid might cause overflow through the vent.

Last where does the A/C drain? That could also result in fluid 'racing stripes.' I thought it drained on the passenger side?
Old 07-04-2017, 04:04 PM
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zxt
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Originally Posted by Randyc151
That looks exactly like my car after a track session or autocross. I'm getting annual service later this week and will check it out.

What were you doing with the car when this happened?
just got back from the track. already saw this happen before, not as much as this one though, thought it was just from getting a carwash or splash from water. but after driving around a 100% dry race track while this was not there before driving i was sure it from some where inside the car.
Old 07-07-2017, 03:04 PM
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JR956678
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Add me to the list with this issue - 991.2 TTs - white so it's really visible. Hope someone actually finds a solution to it.
Old 07-07-2017, 05:21 PM
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I suspect that the solution will involve siphoning-out a quart of windshield washer fluid...
Old 07-08-2017, 04:09 AM
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ace37
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Happening on mine as well.



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