Air Oil Seperator (AOS)

[novotm]

Hi All:

Every morning, my car smokes a bit when I start it. Such smoke on startup has become increasingly consistent over the past few months.

I pulled the tube connecting the AOS to the throttle body, and found a bit of oil in it. I've attached pictures below. My question is: how much oil, if any, should be in this tube?

Thanks,

-Mark

'02 986 2.7L

Tube - AOS side:

Connection - AOS:

Connection - Throttle Body:

[wvicary]

I don't know if there is a known amount of oil one should expect to find when the J tube is removed. The seperator is a common problem and seems to fit your situation..... I would just replace it as a matter of course to see if the problem corrects itself.

[Rodger]

It's normal for the engine to puff a little due to oil sneaking past the piston rings. If copious amounts of oil are making their way into the exhaust after startup, and only after startup, you may be experiencing valve guide wear/stem seal leakage.

For $85 (from Sunset Imports) you can replace your AOS and see if it helps.

And as to your oil question, my AOS which was replaced before it faield had about the same amount of oil in the tubing as yours did. I cut the AOS open and found almost no oil inside it.....it just tends to collect a bit in the tubing.

http://www.renntech.org/forums/index.php?showtopic=13963

http://www.renntech.org/forums/index.php?showtopic=14000