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Discussion Starter · #1 ·
What is the proper level of crankcase vacuum that should be observed in the 987.2S with the 3.4L DFI engine? I have been quoted 3 different numbers by 3 different techs (1 indy and 2 dealers).

From what I understand it is 4-7 inches of water for the 987.1 but the 987.2 should be higher. I am asking with regards to an '09 Cayman S.

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