Today I measured the clearance between the valve and rocker:
Rh bank
1 Ex 0,35 Int 0,25
2 Ex 0,15 Int 0,05
3 Ex 0,15 Int 0,40
4 Ex 0,05 Int 0,55
Lh bank
5 Ex 0,20 Int 0,05
6 Ex 0,05 Int 0,30
7 Ex 0,05 Int 0,40
8 Ex 0,60 Int 0,15
apparently really need to replace all the push rods and rocker...