The rebuild is done.
Engine head fully renewed as the cylinders were switched to new ones and also piston rings and all related gaskets, bearings and belts were changed to a new one.

The list of other changes that were needed relating to the mileage (308 000 Km ):

Steering rack changed due to ...

Thanks for the advice.

After finding a new Volvo specific little workshop near my city things are getting clearer.
I could write that "wors" but now we are progressing with the diagnostics and the "rebuild".

Definitely not PCV and the turbo center part is now hanging again a little but it was ...

Hi All,

I had some oil leaks diagnosed by the dealer as the turbo is having a problem with the centerpiece gaskets.
The turbo eventually got fixed but there is still white smoke and els...

I know that the PCV can be a thing so the line was checked and the box was replaced. Still, smoke and now I ...