my 2010 impala lt has knocking sound coming from engine i just bought it from dealer a month ago

What is your question?

knocking in engine of 2010 impala lt i just bought a month ago. dont know why its knocking tried a few things nothing worked. ive noticed that its knocking from the top of the engine, idk it still runs and drives and there is no check engine light. no leaking, change knock sensor, spark plugs, and oil change. idk can someone help?!

What makes this problem better or worse?

engine knock

How long has your 2010 Chevrolet Impala had this problem?

a few weeks