206 engine sounds

Friends, my 56.500 km 2006 model 206 x design gasoline vehicle sounds like a diesel, I think it came from the tirger set. Is this normal or is it all? I will decide according to your opinions.

If there is a sound coming from the engine, show it to a master as soon as possible. If you take it to the service, they will get a lot of money.

Can the sound come from the valves exactly where does it come from the bottom right?