Yeah, that was my question in post #2

 

Good to know--new information for me. Thanks for clarifying WHY the AOS was brought up as a possibility.

 

Don't start it until you confirm the issue.

 

I just talked to my mechanic. He is an independent Porsche specialist and rebuilds Porsche engines frequently. He believes that the smoke comes from oil from my old broken engine in the muffler. Since there are no fault codes it shouldn’t be anything serious according to him. Bad AOS would generate smoke from both exhausts and bore scoring should create sound if it was that much. He said that normally, bore scoring initially only results in oil consumption and not that much smoke.

So his advice was to just drive it some miles until the oil in the muffler is burnt away.

Robert

 

He is right about my bore scoring...no smoke. Don't remember if anyone asked...any unusual noises. Just to confirm previous engine hand grenaded? If so did the same side hand grenade which could have filled the exhaust?

 

Yes, my old engine said boom at the track. It was one of the right hand side rod bearings that seized (cylinder 6) and destroyed the engine so it makes sense that there are old oil residues in the left muffler.

Robert

 

Simple vacuum test to check the AOS.

 

Yep, if the old engine lost a cylinder on bank 2, the new engine is just cooking the oil from that muffler.. The muffler absorbs a lot of oil, and will smoke for a couple months after engine replacement normally.. I warn my purchasers about this, otherwise they are worried, anything worries people, and that drives me crazy.. You can now expect a primary O2 sensor code for bank 2 pretty soon, since the oil that fouled the muffler, also fouled the O2 sensor. These usually show up in a few hundred miles after a failure that dumps oil into the exhaust :-)

 

Any way to take the muffler out and clean it?

 

I clean them in the ultrasonic.. Ultimately heat has to do the job.
The catalytic converter is really where the oil is concentrated, and the source of the smoke is normally from the cat.