ALOT of blue smoke on cold start

[rs6danbar]

Hello RS246 Im new here!

I own a RS6 V10 2008 that has 124K miles on the clock (Lot of maintenance lately but yes it still runs).
Recently the car have been started to pour tremendeous amounts of blue oil smoke on cold starts, and yes it comes from the right exhaust.
Its currently at the workshop to solve the problem, but i dont seem to understand why this occurs?
It runs great, doesnt take much oil either. It smokes maybe 1 of 4 cold starts and when it does its alot and as soon as it stops smoking after maybe 5 minutes theres no sign of that it ever been smoking that much!
Cant be valve stem seals, theres way too much smoke... Been reading something about the oil return on the right side of the engine is bad on the early RS6's, what does that mean? Workshop is thinking the oil comes from the crankcase ventilation, what do you guys think?

Other then that the car runs great with that much on the clock, still goign strong!

[Jim Haseltine]

At start up, oil in a cylinder gets burned off quickly - few seconds and it's gone (usually). But a little bit of oil can produce a hell of a lot of smoke for a long time if it's being heated rather than burned so I'd suspect that you've got oil getting into the exhaust rather than a cylinder. When I was a kid Hornby used to make train sets with engines that produced 'real' smoke - you put a couple of drops of light oil on a cotton wad that was heated by an electric element (probably banned now for H&S), the things would smoke for ages.

When it smokes has it been parked up for longer than other times (like 2-3 days instead of overnight)? Just wondering if it takes a while for the oil to build up to a noticeable level.

[rs6danbar]

At start up, oil in a cylinder gets burned off quickly - few seconds and it's gone (usually). But a little bit of oil can produce a hell of a lot of smoke for a long time if it's being heated rather than burned so I'd suspect that you've got oil getting into the exhaust rather than a cylinder. When I was a kid Hornby used to make train sets with engines that produced 'real' smoke - you put a couple of drops of light oil on a cotton wad that was heated by an electric element (probably banned now for H&S), the things would smoke for ages.

When it smokes has it been parked up for longer than other times (like 2-3 days instead of overnight)? Just wondering if it takes a while for the oil to build up to a noticeable level.

Its enough with over night, sometimes smoke, sometimes doesnt!

[stevo55]

I also wouldn't have thought 124k is too high a mileage as well...am not sure whether Audi engines are as reliable as BMW ones (I suspect they are) and they are pretty good for 2-300k miles! The V10 seems a pretty bombproof bit of kit if maintained correctly

[tony091]

hi there
mine has done that exact issue and after a year I have finally found out from (ricky RE Performance) that its worn turbo seals ?? it drips into the pipework when the car lays overnight , when the car is active the seal will contain the oil as its spinning at high revolutions ,but when it stops and seals cool it will drip until there is enough & then gets drawn into the fuel intake and burns off in the cylinders & finally exhaust housing . sounds like its only 1 side for you . regards tony

[discostu49]

Sorry to thread jump this is my car on start up after sitting 12 hours I was worried when I first seen it but noticed the r8 and a few other rs6 do the same what is everyone else's like
https://youtu.be/UjAIxbA5ADg

[rs6danbar]

I also wouldn't have thought 124k is too high a mileage as well...am not sure whether Audi engines are as reliable as BMW ones (I suspect they are) and they are pretty good for 2-300k miles! The V10 seems a pretty bombproof bit of kit if maintained correctly

Ofcourse not im not afraid of 124K miles or 20000mil as we say in sweden, i think the Audi V10 is as reliable as the bmw V10, but ofcourse all natural aspired engines last longer

[rs6danbar]

hi there
mine has done that exact issue and after a year I have finally found out from (ricky RE Performance) that its worn turbo seals ?? it drips into the pipework when the car lays overnight , when the car is active the seal will contain the oil as its spinning at high revolutions ,but when it stops and seals cool it will drip until there is enough & then gets drawn into the fuel intake and burns off in the cylinders & finally exhaust housing . sounds like its only 1 side for you . regards tony

Yeah i read your threads, Yeah it only affects the right side, left side aswell when its unbeliavble amounts then it goes over to only the right.
Whats the solution? New Turbo's or can you repair the ones fitted already?

[rs6danbar]

Sorry to thread jump this is my car on start up after sitting 12 hours I was worried when I first seen it but noticed the r8 and a few other rs6 do the same what is everyone else's like
https://youtu.be/UjAIxbA5ADg

I wouldnt be worried about that compared to mine

[discostu49]

hi there
mine has done that exact issue and after a year I have finally found out from (ricky RE Performance) that its worn turbo seals ?? it drips into the pipework when the car lays overnight , when the car is active the seal will contain the oil as its spinning at high revolutions ,but when it stops and seals cool it will drip until there is enough & then gets drawn into the fuel intake and burns off in the cylinders & finally exhaust housing . sounds like its only 1 side for you . regards tony

You have me worried now. From my video did it look like this.I wad sure it was condensation. ..... but I'm now wandering?

[discostu49]

The start up on this r8 makes me feel better about the situation
https://youtu.be/SUyRmXvLjJI

[stevo55]

Sorry to thread jump this is my car on start up after sitting 12 hours I was worried when I first seen it but noticed the r8 and a few other rs6 do the same what is everyone else's like
https://youtu.be/UjAIxbA5ADg

Quite the smoke discharger machine you have there mate....Maybe you could rent it out to rave parties or the MOD!

[discostu49]

Sorry to thread jump this is my car on start up after sitting 12 hours I was worried when I first seen it but noticed the r8 and a few other rs6 do the same what is everyone else's like
https://youtu.be/UjAIxbA5ADg

Quite the smoke discharger machine you have there mate....Maybe you could rent it out to rave parties or the MOD!

It was a cold morning, I'm sure it's condensation. And from the r8 and other videos of cold start rs6 it's looks normal what's your thoughts .?

[stevo55]

Couple of comparison videos for you on cold start-my old M135i that had an Eisenmann quad exhaust back box and the current RS6. Both cold starts in winter /spring and in the morning. The BM chucked out a lot more than the RS as you can see! I'd consider getting it looked at as it does seem excessive. Having said that the R8 video was also acting like a Challenger 2 tank on smoke discharge!
https://vimeo.com/171129503
https://vimeo.com/171129206

[discostu49]

My car just got a full service by MRC Tuning last week and they gave it the OK so will keep an eye on it. Here is anot her car cold start which is like mine
https://youtu.be/ruLjzIAUYeg
And another
https://youtu.be/WZq5T3AIJLc
And another
https://youtu.be/PksnT9uM1Ps
They all seem like mine??