Ring or nail!

Hello together, we recently bought a Mini Cooper Clubman with a 1.6l engine. Now I notice that the engine is ringing or nailing in the stand somehow (as I said, no diesel!) your engines are ringing in the stand, or has only ours. Kind of sounds like a valve game. Are the small engines running around these days, or do I have to worry? Does anyone know what that could be? Is this possibly due to the cold? P.s. Please don’t write, “that this doesn’t sound good, and that I should go to the workshop!” If I wanted to, I wouldn’t ask in the forum! Thank you in advance.