No, measure diameter of hole trough cylinder, calculate surface area (square mm), do the same with the stud, retract one from another.
Calculate surface area thicker stud, retract one from another.
Now you calculate what size you need to drill the hole, I had to drill mine 1mm larger. Oh, make sure you got enough material left before you start drilling.
Drill cylinder and cylinder head. Not hard when you have a drill press