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Old 12-23-2008, 05:55 PM   #2
Paul
Porsche "Purist"
 
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Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
Garage
Let's ask the easy questions first:

Is the tank overfilled? Should be below the max line when the engine is at operating temperature.

Are you removing the cap when the engine is cold? If removed while hot, coolant is likely to be lost.
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1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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