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Could be an exhaust mount.
HVAC blower fan. The carbon brushes wear out over time.
AussieJet replied to Fmscell's topic in 9PA, 9PA1 (Cayenne, Cayenne S, Cayenne Turbo, Cayenne Turbo S)How is the timing been centred is the question. These engines have 35 degrees of variation due to the variable actuator. The camshaft timing is set to + or - 6 degrees, the variable actuator then centres the cam for precision timing. Meaning your computer will always show your timing as perfect. Unless someone has messed up the timing it should be considered ok. It is the variable system that plays up. If the timing chain was to stretch enough to cause a CEL it would be noticed at startup or efficient cruise speeds when the variation is at its limit. It’