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A failed AOS will give white smoke on start up, then clear when running. It'll also give bad running as this can cause a vacuum leak.
Good way to test it - with the engine running, see if you can remove the oil cap with little to no effort. If you can't budge your oil cap with the engine running, your AOS is bad as it's causing a huge vacuum.
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Porsche Boxster S Type 986
Bi-xenon Headlight Upgrade | 987 S 18" Anthracite Alloys | Android Head Unit | 5000k 55w HID's | 5000k Cree DRL's | 5000k Cree number plate lights | Cree LED Indicators | One-touch roof operation | Bypass exhaust pipes | Parking sensors | Ambient footwell lighting
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Threaded Mode
