im aware the turbos do this but mine does it every time its warm and idling for more than about a minute is this normal can this smoking cvause carbon build up and thus damage turbo.
i am using type r 5/40 synthetic is it possible this is causing it if so which oil can i get in synthetic as 10/40 as type/r dont do one, they only do a 15/50 synthetic.
As you say, the majority of turbo units will smoke when on idle for long periods of time as the oil moves slowly round the turbo and then starts to seep past the seals. The older the seals the more pronounced this will become.
When sitting stationary for long periods of time rasie the revs gentley and slightly to increase the speed of oil flow round the turbo.
Just a thought with regards to oil choice, if using a 0/40 oil would the results not be the same as using a 10/40 oil as at operating temperature surely they are both behaving as an oil of a 40 viscosity? If you get what I mean.
I think what you do is remove the breather hose that goes from the back of the cam cover to the turbo, cut it and put in a container to catch the residue that comes out of it, i.e. so it doesn't reach the inlet of the turbo.
Just how savage said.. The breather hose runs into the top of the turbo remove this and fit this pipe into a container (A coke bottle with a few small holes around the top does nicely) Make sure you block the hole left in the turbo with something or cut and leave a small portion of pipe attached and use a big bolt and jubilee clip....
Make sure its tight you really dont want anything being sucked into your turbo..............Thats it done all oil etc will now collect in your coke bottle and not run through the turbo and back into the engine........
The oil that runs through the turbo enters through the thin oil feed pipe that sits on top of the unit.
The breather pipe is there for legal reasons (I believe) and basically burns all the crankcase gases that build up, in other words they are not allowed into the atmosphere but insted enter the inlet of the engine and become burnt. However, oil can and does feed back through that pipe and hey presto you have hot oil entering the compressor wheel of your turbo, the result....blue smoke and possible broken blades.