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Old 03-17-2013, 04:49 PM   #1
Boxster 1999
 
Join Date: Feb 2013
Location: Canada
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Oil separator making noise on ignition

I hear a noise from the oil separator as soon as I switch the ignition on. Sounds like a fluorescent ballast ready to blow up. Is this normal or I should change it. Thaks in advance!
Edit: I have a Boxster 99 2.5l
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Last edited by Barteur; 03-17-2013 at 04:50 PM. Reason: Added information
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Old 03-17-2013, 05:06 PM   #2
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You are probably hearing the air injection system, which injects air into the exhaust to lessen emissions on start up. The AOS does not make any noise, even in failure mode.
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Old 03-17-2013, 05:10 PM   #3
Boxster 1999
 
Join Date: Feb 2013
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I thought it was this part since when I put my hand on it and kind of shake it the noise change. Is this a normal noise?
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