911 Carrera Cabriolet (997) F6-3.6L (2007)
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6. Connect compressed air supply to Venturi nozzle.
7. Open both shut-off valves on the vacuum pressure gauge until the transparent filler hose has completely filled with coolant.
8. Close the left shut-off valve on the vacuum pressure gauge and allow a vacuum to build up in the coolant circuit.
9. When there is sufficient vacuum in the cooling system -> Vacuum established (pointer in green region), close right shut-off valve and then
disconnect the compressed air supply.
