I couldn’t find these specs anywhere on any forum! But thanks to a friend on FB here’s the factory specs of valve sizes on engines M110, M116, M117 & M100 6.9. If I find the M100 6.3 specs (or if anyone else has a service manual for one), please post them here for a handy reference.
Mark, these valve measurement specs. - are they for a 6.3 or 6.9 ? I do know for a fact that the valves for the two models are completely different. Regards Styria