Ticking valves

[jos 4 age]

Hi,
Its been a while since I visited the forum. We moved to a different house so have been very busy with that. Enough new posts to read though
Last December I put the car on a rolling road to have the ecu callibrated.

After that everything went fine. But after driving around for lets say 100 kilometers I heard a strange ticking coming from the engine. I think its the valves that have to be adjusted ? When the car runs idle everything sounds okay but under load I can clearly hear it ticking.
Because of the heavy load put on the engine on the rolling road something has to be adjusted

cheers
Jos