Hello, i have the following issue.
When the engine is idle and i push the D or R gear, the soft knocking occurs on passenger's side (probably from the engine).
After all spark plugs replacement the sound dissapeared and came back when the engine is hot.
Do you have any ideas what it could be ?

P.S. The mp4 file with mentioned sound: https://easyupload.io/we7ac5

 

I would hope its an exhaust leak or a broken motor mount, something simple like that. But it sounds like the connecting rod is worn out, letting a piston smack the side of the cylinder I'm no expert and this is just my opinion, I hope I'm wrong

 

In my opinion if the piston smacks the side of cylinder it would be more metallic sound instead of soft. The sound dissapears with more RPM... what is strange.