Brian J Canberg

Hello All:

I'm a new member and owner of a beautiful 08 Turbo. Car is clean and has been checked out very well.
Motor makes no noise what-so-ever, that wouldn't be considered absolutely normal and badass. The car is sound.
Suddenly, it started coughing up blue smoke on start up. I didn't realize it until I smelt the burning oil smell and realized i was backing up into a cloud of smoke. I went right home and tried to see if I could see any smoke at idle and there was nothing. I shut it down and started it again, and low and behold, a big cloud of "blue" smoke. It clearly isn't water burning. I could absolutely smell the oil.
I had it towed to a repair facility who specializes in European/ foreign cars (they've done all my previous work on my Jag XJR) - They're a very reputable shop.
I was told it is most likely the Air / Oil Separator. (AOS) which makes sense based on what I read after seeing the smoke initially.
Long story short, I had the separator changed along with the plastic breather hoses that feed connect to it and I picked it up earlier this afternoon. It was quoted as being a "crankcase vent valve..."
The car is still smoking... I took it back right away and I was told that its most certainly residual oil that needs to burn off and it should go away shortly.
I drove it for about 20 - 30 miles, and the car feels and sounds great, but still smoking.
Any thoughts or advise?
I bought the car from Minnesota after it was checked out through Porsche in St Paul. I drove it home to New Jersey and I never once saw any sign of any smoke or smelt nothing burning at all in the 6000 miles I've driven it since purchase.
I'm left scratching my head, wondering what could have possibly happen from one day to the next... I can't help but think that if there is some catastrophic engine failure happening, I'd see some kind of notice or warning, or I'd hear something before suddenly coughing big clouds of smoke from totally seemingly normal operations.

Please help.

Thanks for your time

Brian

nodoors

I am not quite understanding the smoking behavior. Are you saying it only smokes on startup or also at idle and when driving? What about when stepping on the gas hard underway or revving the engine with no load? Crankcase vent valve and AOS are the two easy things to try first. These are the first steps I would do to investigate:

1. Thoroughly inspect the intake plumbing to see if it is coming from one side in particular indicating you may have a bad turbo seal. Also, check to see how full of oil the drivers side intercooler plumbing has become. You might just have a hell of a pool of oil in there.
2. Scan it using a computer that can read Porsche codes that might not have fired an SES light yet.
3. Pull the plugs and see if it is one particular cylinder giving you grief.

Brian J Canberg

nodoors

I don't think a bad AOS or crankcase vent will cause that much smoke. Check them both out and do the other things on the list, then get back to us.

After your description, it is sounding more like a turbo to me. This could take out one or both of your catalytic converters and/or o2 sensors pretty quickly if it is as bad as I am picturing. I am sure others will chime in with more advice and experience.

v10rick

Purchase a diagnostic scan tool like Durametric or others, if you intend to diagnose issues before a visit to the indy shop.

With the info you are providing we can only offer a wild guess.

With a video of the smoke and diagnostic codes maybe we can narrow it down for you.

Petza914

Any chance your oil level is a good bit over full. Blown turns on these don't happen very often.

user 83838290

Your CTT is turning into first direct injected two stroke V8 turbo in the world ;-)

Fun aside, all valid points ^^^. The turbo housings like to crack on the inside, all the way to the bearing and can ingest oil through there - I have changed a couple of sets to prove this
You won't be able to tell until you pull them. To pull them, you have to pull the engine... welcome to the wonderful world of cayenne tt ;-)

Brian J Canberg

Brian J Canberg

Brian J Canberg

Brian J Canberg

Brian J Canberg

Brian J Canberg

Video of start up

ScootCherHienie

If more smoke is coming out of one exhaust pipe than the other, check the spark plugs on that side of the engine (you could have all the smoke on one side, a little smoke on one side and a lot of smoke on the other side or roughly equal amounts of smoke on both sides. If the spark plugs look good, I'd vote for a cracked turbo housing. If 1 or more spark plugs look fouled with oil (black, ugly buildup on the plug, may even look wet), the problem is inside the engine. If the spark plugs look good, that would be even more reason to suspect the turbo housing being cracked. If all the smoke or most of the smoke is from one side, that would indicate the side with a cracked turbo or bad cylinder.

Valve guide leakage is (relatively) common as engine problems go, but it generally involves just one cylinder and it doesn't typically appear suddenly... it gets worse slowly over time. And smoke from valve guide problems is worse right after the car has been sitting with the engine off for a while (oil leaks past the valve seal(s) and drips into a cylinder while the engine is not running. This doesn't sound like it could be the cause of the problem you are having.

v10rick

With a AOS tear it usually makes a very loud whistling sound.

https://www.youtube.com/watch?v=EIV-LTGFsgw&feature=youtu.be

Since you did not mention this I am surprised the indy decided to replace it.