They are very easy.
Drain coolant.
Pull timing cover an remove cam bolt,break pulley free and remove.Remove timing belt tensioner and stud.Unbolt inner timing cover from head.I usually line it up at TDC before removing the belt,it's easier going back together
Remove air cleaner,rocker cover,injector lines,glow plug feed wire,hoses,unplug sensors,etc.
Unclip exhaust,remove head bolts,and lift head off engine.
Use a 1.9L HG and new bolts too.