Oh no - do you mean electrical smoke from under the inlet manifold or oil smoke from under an exhaust manifold?

as you have had the inlet manifold off I would remove it again and see if any wiring got caught/damaged??

 

It looked and smelled mostly like oil smoke, but could have been something else... There was no any wiring passing behind manifolds, I checked it carefully before to get it back.
I have all wiring/connectors rechecked this evening, looks OK.
I will try to read ECU errors tomorrow and see what it says.
Just reminded, I turned the crank with a ratchet today and at some point I felt an enormous resistance, like something blocks hard the crank. so I turned it a little bit back (means counter clock wise and really a bit) and then it moved until it gets blocked next time. And it felt like there is no compression in cylinders...

 

You should feel resistance every 120deg as you turn it, compression will feel quite springy, if you feel hard resistance then it maybe something else. Did you take any pictures as you changed the timing cover?

 

[QUOTE=simonsi;174789]You should feel resistance every 120deg as you turn it, compression will feel quite springy,

I know, but now it's not really springy now.

I did not take any pictures as nothing has changed except new cover.