Boxster S (987) F6-3.4L (2008)
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Shutoff valves open
10. Close left shutoff valve on the vacuum pressure gauge -arrow- and allow a vacuum to build up in the coolant circuit.
Left-hand shutoff valve closed
Information
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If a vacuum does not build up, there is a leaking valve in the coolant circuit.
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Deformation of the rubber hoses of the cooling system is normal.
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When the pressure gauge pointer is in the green area of the display scale, a sufficient vacuum has been built up.
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After both shutoff valves on the vacuum pressure gauge have been closed and the compressed air supply has been disconnected, the vacuum must
not drop. If the vacuum drops within approx. 30 seconds, there is a leak in the coolant circuit.
11. When there is enough vacuum in the cooling system --> Vacuum established (pointer in green region), close right shutoff valve and subsequently
unplug the compressed air supply.
Vacuum established (pointer in green region)
12. Open left-hand shutoff valve to the vacuum pressure gauge (right-hand valve closed -arrow-). The cooling system is then filled.
