Thanks, I believe this might be a solution to my problem.
But the story is that turbo was working fine, than I had major crankshaft explosion....broken oil sump and engine block - open holes and parts laying around!!!!
Got another engine, changed it along with flywheel, clutch set, distribution belts and now am trying to prevent further financial rip-off by a garage saying "a turbo should be checked too and it will cost you xxx euros!!!".
Turbo was working normally and it was "off duty" for 3 months....and now it is %ucked up....!!!
Bought that 156 with 110k.
Had some slight problem with upper rubber intake pipes,switched that and MAF.
I made 120k with that engine,never had a turbine failure.
Never left the engine without oil - changed and checked tidy.
What happened to engine nobody knows.....
So is there a safe way to be sure that turbo should really get disjointed, cleaned and ballanced (more money!!!!!), or is it a grey zone for the garage because I am not a mechanic and a car is not in my hands....
I am aware that it should be done, but maybe later in the timeline if it is working correctly (as it was perfectly OK before the engine block decay).
Any opinion on that?!