I am replacing intake manifold due leak (plastic crap). I want to know if there is any specific trick to bleed fiat bravo 1.6 multijet cooling system? Any advices?

Not sure of anything special..

Look for bleed screws on rad and heater hoses

Top up.. squeezing hoses as you go..
Seal off bleeds while keeping fluid against them

I like to overfill the coolant header.. then let it idle with the cap off

It will 'burp' itself quite well

Do let us know how it goes.. and what you learn