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Old 04-27-2015, 06:53 AM   #4
Burg Boxster
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Join Date: Nov 2006
Location: In the garage...
Posts: 1,732
Yes.......

- yes bad cap allows air in (de-pressurizing system and greatly reducing boiling point of coolant...)
- yes coolant leaks directly from under cap (mostly steam vapor - white crusty residue is sign...)
- yes coolant escapes from relief valve on boil over via overflow aka Boxster will "pee" in front of right rear wheel...
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