986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

Dale_K · 10-28-2011, 01:15 PM

Try removing the oil fill cap while the screeching is going on. It would be a test for excessive vacuum (bad AOS). Probably not the issue but the test is so easy it's worth a shot.

10-28-2011, 01:15 PM	#5
Dale_K Registered User Join Date: Dec 2010 Location: Hot Springs Village, Arkansas Posts: 245	Try removing the oil fill cap while the screeching is going on. It would be a test for excessive vacuum (bad AOS). Probably not the issue but the test is so easy it's worth a shot.