White smoke on startup (AOS replaced last year)

[truegearhead]

Could the AOS have failed again? Or is there another potential cause, it rarely smokes but it really drops a bomb when it does.

[JFP in PA]

Originally Posted by truegearhead

Could the AOS have failed again? Or is there another potential cause, it rarely smokes but it really drops a bomb when it does.

Always possible, try removing the oil fill cap while the engine is idling; if it is very hard to get off, the AOS is on its way out.

[Jamesp]

I've had a similar experience. Not "dropping a bomb" but two or three times on start up it's generated oil smoke for a few seconds. I've no idea why, but I've read that it's not uncommon. I'd still like to understand it and prevent it if possible.

[first boxster]

When the smoke event happen had you started the car at sometime and just run it briefly then shut it off? I have had it occur a couple of times when I start it and just move on the driveway. The next time that I start it up, I get a puff of smoke. If I run it for a few minutes and then stop it I have no issues.