Yay! Billowing blue smoke
Thread Starter
AudiWorld Super User
Joined: Apr 2002
Posts: 2,401
Likes: 2
Yay! Billowing blue smoke
So I get on the road this morning, it's about 12 degrees out and my A6 2.7t is puffing out blue smoke like a chimney.
Initially I suspect head gasket, but this is my first turbo vehicle. -Is it possible that a turbo failure would have a similar symptom?
It appears that the oil burn came on somewhat gradually (over a week or 2). I noticed a burning oil scent, but guessed it was a cam seal or something like that. Now obviously it's a bit more severe than I'd guessed...
Any thoughts on items to check or potential failure points would be greatly appreciated.
Thanks!
Initially I suspect head gasket, but this is my first turbo vehicle. -Is it possible that a turbo failure would have a similar symptom?
It appears that the oil burn came on somewhat gradually (over a week or 2). I noticed a burning oil scent, but guessed it was a cam seal or something like that. Now obviously it's a bit more severe than I'd guessed...
Any thoughts on items to check or potential failure points would be greatly appreciated.
Thanks!
AudiWorld Super User
Joined: Dec 2004
Posts: 4,747
Likes: 0
I have a bad cam seal on my Pass. side. I started to smell a faint oil smell. My car sat for about a
week while I was doing the suspension. I test drove it and when I got back there was smoke pouring out from under my hood. I assumed the worse but it was only oil on the manifold.
When the cam seal goes bad the oil drips onto the manifold.
Is the smoke coming from your tail pipe or engine bay?
<a href="http://s64.photobucket.com/albums/h195/Fast_N_Snow/?action=view¤t=oil.jpg" target="_blank"><img src="http://i64.photobucket.com/albums/h195/Fast_N_Snow/oil.jpg" border="0" alt="Photobucket"></a>
You can see where the oil collected on the manifold. As soon as that heats up it stinks and sometimes smokes.
When the cam seal goes bad the oil drips onto the manifold.
Is the smoke coming from your tail pipe or engine bay?
<a href="http://s64.photobucket.com/albums/h195/Fast_N_Snow/?action=view¤t=oil.jpg" target="_blank"><img src="http://i64.photobucket.com/albums/h195/Fast_N_Snow/oil.jpg" border="0" alt="Photobucket"></a>
You can see where the oil collected on the manifold. As soon as that heats up it stinks and sometimes smokes.
Tech Guru
Joined: Mar 2003
Posts: 6,006
Likes: 2
If it goes away once warm, its probably being cleans by the CAT; or could be valve guides
..which means you'll foul the cat. Not a good sign.
I would get at least moderately excited. Yes, blue smoke is one sign of turbo failure.
However, another likely cause is valve stem seals, whcih is considerably less serious.
G
I would get at least moderately excited. Yes, blue smoke is one sign of turbo failure.
However, another likely cause is valve stem seals, whcih is considerably less serious.
G
AudiWorld Super User
Joined: Apr 2001
Posts: 9,231
Likes: 7
From: Northern NJ
Highly likely you have a frozen/blocked suc pump/valve. See link for more details -->
Follow this thread for description of symptoms and suggestion on how to deal with it until you can properly diagnose/fix it.<ul><li><a href="https://forums.audiworld.com/a6/msgs/822079.phtml">Smokescreen 'b Bone - Klick here!</a></li></ul>
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Thread Starter
AudiWorld Super User
Joined: Apr 2002
Posts: 2,401
Likes: 2
Well it seems to definitely be related to the suction pump PCV system
Thank you very much!
Due to my 20vt project, I have no space in my garage to work on the A6. I was dreading needing to do a head gasket in the driveway!
You all made my day
.
Due to my 20vt project, I have no space in my garage to work on the A6. I was dreading needing to do a head gasket in the driveway!
You all made my day
.