Quote:
Originally Posted by balongbalong
they said it was blocked with oil sludge, are they BS-ing me? and they don't know what caused the sludge either 
anyway got the vehicle back and been driving it over the weekend.
no loss of power, no white smoke during idle anymore, however there is still that black smoke when you floor it. gassed it on two different stations and no smoke still. gassed it only a little then try to empty the tank before filling up with another station. now its time to check gas consumption as i have filled it up in full. will monitor also coolant and oil levels every two days to see if level gets low
anyway here is a picture of the two old turbos, wondering what caused the bent impeller blades on both. left is the older one, right one is the supposed new turbo that is leaking and was replaced as well.
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I cant see properly the compressor vanes on the new turbo that was also replaced!But the vanes also look damaged!Is that right?
Anyway,the only way the vanes can get damaged that way is when get a strange object from the pipe that goes to the air-filter!Nothing would go past the air-filter itself,so someone must have left something there ,like a screw !
When they removed the turbo,they must have found bits of the object there,I am sure????
This is the culprit and why you had white smoke..NOT because of a clogged outlet pipe!Because of the "strange object" hitting the vanes it would warp the turbine rod sufficiently to allow oil to be blown to inlet manifold and out of exhaust.
This happened on the first turbo you replaced.you now have to ask yourself who before this,changed your airfilter or did any work around it?
If its the same shop that replaced the turbo,then they screwed up big time ! Use the pictures you taken and hold them responsible!Tell them you will send them to BMW ,if needed.
Good luck.