16V setting height
It is important to set the correct valve stem height for the 16V hydraulic lifters to work properly. The height is 49.4mm +/- 0.04 (=2 thou). This is measured from the top of a 30mm OD bar lying in the cam journals (which are 30mm ID) down to the top of the valve stem. I drilled 8mm dia holes in my bar so I could measure with the thin rod on a vernier micrometer from the top of the bar to the valve stem.
If you give this dimension to your cylinder head shop they can grind the valve stems to suit.
Dick Prince Ovlov.net