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Smoke on Start up


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Hi All,

No doubt this has already been answered but hear tis..

I have a 2003 Boxster with approx 30K miles. I'm going in for my 30K maintanance soon (shudder) and wondered if I should have the AOS looked at/replaced ?

The is no smoke from the exhaust under most all driving conditions including an occasional Auto-X.

However, I've noticed that if the car sits for a several days (5 days the last time) it will belch out quite a bit of thick bluish-white smoke on startup. This only lasts for a second or two. Mind you, the motor fires right up without any trouble and goes through it's normal initial idle program.

I'm tending to think this is "normal" but any insight would be helpful.

Thanks.

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Hi All,

No doubt this has already been answered but hear tis..

I have a 2003 Boxster with approx 30K miles. I'm going in for my 30K maintanance soon (shudder) and wondered if I should have the AOS looked at/replaced ?

The is no smoke from the exhaust under most all driving conditions including an occasional Auto-X.

However, I've noticed that if the car sits for a several days (5 days the last time) it will belch out quite a bit of thick bluish-white smoke on startup. This only lasts for a second or two. Mind you, the motor fires right up without any trouble and goes through it's normal initial idle program.

I'm tending to think this is "normal" but any insight would be helpful.

Thanks.

You are on the wrong forum but; blue smoke out the tail pipe typically is burning oil. Wear in your engine allows oil to bleed into your cylinders. Longer it sits, more oil seeps in, the more oil to burn. This could be valve guides or rings. Or maybe something else…I’m not familiar intricacies of these motors, these are just generalities

Regards, PK

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ex86er, how long has it been doing this? Recently?

This is pretty common with the boxer engine. And normal to get a puff of smoke on start-up. But a lot of smoke could mean the AOS needs replacement. Better to do sooner than latter because your MAF could get messed up too.

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Hi All,

No doubt this has already been answered but hear tis..

I have a 2003 Boxster with approx 30K miles. I'm going in for my 30K maintanance soon (shudder) and wondered if I should have the AOS looked at/replaced ?

The is no smoke from the exhaust under most all driving conditions including an occasional Auto-X.

However, I've noticed that if the car sits for a several days (5 days the last time) it will belch out quite a bit of thick bluish-white smoke on startup. This only lasts for a second or two. Mind you, the motor fires right up without any trouble and goes through it's normal initial idle program.

I'm tending to think this is "normal" but any insight would be helpful.

Thanks.

I believe your year Boxster has the "improved" or updated version of the AOS. Do a search for AOS and you should find a clear explanation of how to identify the difference between the two versions.

Here is a link to Mike Focke's Boxster Pages that will explain everything you might ever want to know about the AOS and that also shows you the install procedure and a couple of photos that show the difference between the two versions: http://mike.focke.googlepages.com/airoilseparatorreplacement

The early versions are a repair waiting to happen, while the later ones are not as problematic.

Regards, Maurice.

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Hi All,

No doubt this has already been answered but hear tis..

I have a 2003 Boxster with approx 30K miles. I'm going in for my 30K maintanance soon (shudder) and wondered if I should have the AOS looked at/replaced ?

The is no smoke from the exhaust under most all driving conditions including an occasional Auto-X.

However, I've noticed that if the car sits for a several days (5 days the last time) it will belch out quite a bit of thick bluish-white smoke on startup. This only lasts for a second or two. Mind you, the motor fires right up without any trouble and goes through it's normal initial idle program.

I'm tending to think this is "normal" but any insight would be helpful.

Thanks.

I believe your year Boxster has the "improved" or updated version of the AOS. Do a search for AOS and you should find a clear explanation of how to identify the difference between the two versions.

Here is a link to Mike Focke's Boxster Pages that will explain everything you might ever want to know about the AOS and that also shows you the install procedure and a couple of photos that show the difference between the two versions: http://mike.focke.googlepages.com/airoilseparatorreplacement

The early versions are a repair waiting to happen, while the later ones are not as problematic.

Regards, Maurice.

Thank you all. Sorry for the inappropriate posting.

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It's definitely worth checking this out if only to eliminate it is as a possible cause... if you can find the top of your engine you can do the check! AOS is on the rhs of the engine at the rear of the inlet manifold, with a corrugated plastic pipe (approx 3/4" dia) running to the air inlet pipe. Disconnect this pipe and stick your finger in - if it comes out oily then that oil will get sucked into the motor and cause your smoke.

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