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jackg86 · 06-01-2007, 10:21 AM

Greetings,
My 2001 Boxster S, 78,000mi, has started making a loud, high pitched squeal after it warms up. An online 'expert' suggested I loosen the oil filler cap while this noise is present and see if that cures the problem. It did. My understanding is that the AOS is defective and is pulling air through the front seal. Here's my question. Will replacing the AOS cure the problem or is there now a need to replace the foward main seal as well. All advice is greatly appreciated.

Jack

06-01-2007, 10:21 AM	#1
jackg86 Registered User Join Date: May 2007 Location: Old Saybrook, CT Posts: 1	What's that noise? Greetings, My 2001 Boxster S, 78,000mi, has started making a loud, high pitched squeal after it warms up. An online 'expert' suggested I loosen the oil filler cap while this noise is present and see if that cures the problem. It did. My understanding is that the AOS is defective and is pulling air through the front seal. Here's my question. Will replacing the AOS cure the problem or is there now a need to replace the foward main seal as well. All advice is greatly appreciated. Jack