Kia Stinger – After valve play control easy nailing from the engine compartment

Hello together, today I picked up my Stinger after the 90000 inspection. Changed the valve head seal as well as adjusted. When I was at home I listened to the warm engine and found that the engine from the left engine compartment half a bit nailed. I’m not sure if this was always like this and is normal or if something was wrongly set. The engine had always been clambered when it was completely cold but only for 2-3 minutes, which is a lot of fun. I have your stinger. But that was more of a nailing than a clacking. Can it be that it has always been like this and I’m pretending. Does anyone have any experiences?