buzzing engine noise. Help! - 986 Forum - The Community for Porsche Boxster & Cayman Owners

heiwaz · 11-13-2010, 08:54 AM

so, if the problem came from de AOS when I try to unscrew oil fill cap, what happend with it? it's hard to remove or what? thanks.

extanker · 11-13-2010, 09:24 AM

have you talked this noise over with the people that are working on your motor ?

heiwaz · 11-13-2010, 09:55 AM

No, I'm doing by myself. I've got mechanical title

I'will check the AOS.

J Tinsby · 11-14-2010, 12:27 PM

Quote:

Originally Posted by heiwaz

No, I'm doing by myself. I've got mechanical title

I'will check the AOS.

Search using the word AOS then find the post called " Is my AOS going?" Scroll down and read the posting by 944boy. His post sounds very much like what you describe.

Good luck,

J T

Sorry I don't know how to copy the link to someone else's posting for you.

heiwaz · 11-14-2010, 02:26 PM

Quote:

Originally Posted by J Tinsby

Search using the word AOS then find the post called " Is my AOS going?" Scroll down and read the posting by 944boy. His post sounds very much like what you describe.

Good luck,

J T

Sorry I don't know how to copy the link to someone else's posting for you.

This sound he described is a vacuum sound, it's different that mine.

jcb986 · 11-15-2010, 05:09 AM

When a AOS goes bad or starts to go bad you may have a different warning sounds. The most common is smoke coming out of the engine when running. Mine made a whistle like screetch when the engine warmed up. The vacuum that is being pulled can suck air around the crankshaft seal. So, if you cannot remove the oil filler cap when the engine is running then the AOS is going bad. Was this noise there before you started doing the engine maintenance, if so, then you did not cause the problem. Not sure if you are suppose to run a flat 6 with the flywheel off.

extanker · 11-15-2010, 05:39 AM

Quote:

Originally Posted by jcb986

When a AOS goes bad or starts to go bad you may have a different warning sounds. The most common is smoke coming out of the engine when running. Mine made a whistle like screetch when the engine warmed up. The vacuum that is being pulled can suck air around the crankshaft seal. So, if you cannot remove the oil filler cap when the engine is running then the AOS is going bad. Was this noise there before you started doing the engine maintenance, if so, then you did not cause the problem. Not sure if you are suppose to run a flat 6 with the flywheel off.

i wanna see him start it with the flywheel off...does yours have a pull start