Sound sometimes hard to know what and where they are coming from, even when we are hearing from the car physically, therefore from forum posting is even more difficult. Maybe just tembak only.....lolThis sounds comes from the engine as it follows the engine standard operating sounds
Here is what I just learn from my mechanic last week. My wife's China SUV was not driven for a few days, then when it was started, got loud knocking noise. After idle for a while still won't go away. The sound like tappet knocking, the more we rev the louder it became. Off and on engine again, sound still there.
Called my mechanic and explain the issue to him. He say could be your belt but I say sound like tappet knocking, so he ask me try by pouring water on the belt. I did that and the sound quiet down a bit, so I kept pouring water bit by bit, and after a while no more sound. It is now one week already and still quiet, so how to explain.......lol