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For the last while, my car has smoked badly (read fill yard with blue smoke) on cold start up from one exhaust. It did it in the workshop after the car had been sat there overnight and the tech said that it was quite normal. It has only started doing it recently and I wondered if anyone else is getting the same thing.
Part that confuses me is that it has not always done it.

id give it to audi and , demand an answer

It's toast ..... oil being burnt ... duff ring .... the ONLY time I have seen this and it has not been an engine problem is on a Porsche 997 Turbo when a valve sticks open.

Did you thrash it when it was cold ?

My cars smokes from the exhausts when cold and only has 300 miles on it too. I wouldn't call it heavy though.

markwm wrote:My cars smokes from the exhausts when cold and only has 300 miles on it too. I wouldn't call it heavy though.

Sounds like normal water vapour when cold.

Agree with the diagnosis of simple1's car - since the smoke only comes from one exhaust that means you have a problem with one bank of the V only - most likely a faulty oil control ring on one piston or a valve stuck.

Thanks for confirming my thoughts, will land in there on Tuesday and see what happens.

No real smoke so far, into Audi I think

Blue smoke sounds like extremely bad news. Do not drive the car if possible and get it towed to audi. I'd be stripping the engine down to have a look at the internals. Hope all goes well.

Andyuk911 wrote:It's toast ..... oil being burnt ... duff ring .... the ONLY time I have seen this and it has not been an engine problem is on a Porsche 997 Turbo when a valve sticks open.

Did you thrash it when it was cold ?

Oil on start up is not a piston ring and the oil on start up on the Porsche 997 Turbo is not a sticky valve it's because Porsche use a Flat 6 engine which means the pistons lay flat and sometime's oil passes the rings and on their engines this is normal.


_______________________
07 Model Year RS4
04 996 Turbo S with switchable ecu maps
580 hp on race profile on sunoco GT Plus
550 hp on fast road profile on super unleaded.

simple1 wrote:For the last while, my car has smoked badly (read fill yard with blue smoke) on cold start up from one exhaust. It did it in the workshop after the car had been sat there overnight and the tech said that it was quite normal. It has only started doing it recently and I wondered if anyone else is getting the same thing.
Part that confuses me is that it has not always done it.

If they tell you it's normal then they must know what it is that's causing it.
Also ask them why it is only from one exhaust, sometimes cars do smoke a bit on start up but it would normal if it were from both exhaust's as each exhaust supplies a different bank of cylinders.
If you've started the engine and it has'nt warmed properly before turning it back off then next time you start it from cold you may get smoke.


_______________________
07 Model Year RS4
04 996 Turbo S with switchable ecu maps
580 hp on race profile on sunoco GT Plus
550 hp on fast road profile on super unleaded.

t_urbo, up to speed on that, but a gumballer with a brand new 997 turbo had buckets of blue smoke ... but this turned out to be a know 'fault' and the oil just need to be burnt off ..... was not oil creeping past pistons due to a lack of use.

Andyuk911 wrote:t_urbo, up to speed on that, but a gumballer with a brand new 997 turbo had buckets of blue smoke ... but this turned out to be a know 'fault' and the oil just need to be burnt off ..... was not oil creeping past pistons due to a lack of use.

If it's a known fault then that's not normal.
I never said that oil creeps past the pistons through lack of use, oil creeps past the pistons in the flat 6 engines period!
Sorry to have to correct you again.


_______________________
07 Model Year RS4
04 996 Turbo S with switchable ecu maps
580 hp on race profile on sunoco GT Plus
550 hp on fast road profile on super unleaded.

Audi will probably say sorry, wear and tear and ask you to pay for a full engine re-build knowing what they are like.

Seriously though, it sounds like it could be oil seeping past the valve stem seals on one particular bank when the engine is left standing. Good way to test if it is a head problem is to drive the car to about 6k in a medium gear (like 3rd) take your foot off the throttle, let it run back down to about 2-3k against compression then put your foot flat - if you get a huge puff of smoke then one of the valve stem seals/valves are jigged.

Eitherway, Audi need to get it sorted ASAP...

ZeroK66 wrote:Audi will probably say sorry, wear and tear and ask you to pay for a full engine re-build knowing what they are like.

Seriously though, it sounds like it could be oil seeping past the valve stem seals on one particular bank when the engine is left standing. Good way to test if it is a head problem is to drive the car to about 6k in a medium gear (like 3rd) take your foot off the throttle, let it run back down to about 2-3k against compression then put your foot flat - if you get a huge puff of smoke then one of the valve stem seals/valves are jigged.

Eitherway, Audi need to get it sorted ASAP...

Exactly what he says.



_______________________
07 Model Year RS4
04 996 Turbo S with switchable ecu maps
580 hp on race profile on sunoco GT Plus
550 hp on fast road profile on super unleaded.

Not burning on the over run....... nor when the engine is warm. I was talking to somebody from Cosworth today, and informs me that it is 'normal' as in these engines have very short skirts and massive tollerance when cold, and it is possible that it will smoke for anything upto 20k miles. Still not convinced as it is only right bank smoking. I feel an internal inspection through plug hole coming on.