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Old 05-01-2015, 07:45 AM   #7
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Join Date: Nov 2005
Location: Florida
Posts: 529
What usually happens in these cases is ...

... that there is air trapped in the coolant system.
After a drive when everything is hot and pressures at the highest the air bubble exits via the pressure relief valve, through the drain hose, but takes with it whatever coolant is in front of it.
This is most prevalent when driving hard in the mountains because of the changes in atmospheric pressures.
Most likely when you refill your system with coolant using the AirLift System there won't be any more air inside and the problem won't happen again.
Happy Boxstering,
Pedro
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