2002 Porsche Boxster - have squealing coming from engine vent, doesn't seem to effect driving, doesn't always happen. When it does, it starts after the car is warm, usually 10 minutes after starting. Had serpentine belt replaced, still happens... any ideas?
Mine did that off and on for a month with no other problems then it started making a loud suction noise and the check engine light came on. I took it to the dealer and they said the "oil separator" needed to be replaced.
After the repair I never heard the squealing again.
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