I was driving around the other night and while parked and at idle, i heard a light knocking sound which i have never heard before... Checked oil, seemed fine, and everything drove normal. I turned the car off and let it sit awhile, then started it up again. Same knocking. Went home, let it idle in the garage, no more knocking 
. Start it up in the morning, no more knocking? Im still kinda of worried, so i change the oil, and drive it around no knocking. Drive around some more, knocking starts back up? I cant actually pin point the knock, but if i had to guess its coming from the back end of the engine,right beneath the intake??? i have no clue as to what it could be, just hoping, someone might have an idea as to what it may be, also if its serious. thanks.
. Start it up in the morning, no more knocking? Im still kinda of worried, so i change the oil, and drive it around no knocking. Drive around some more, knocking starts back up? I cant actually pin point the knock, but if i had to guess its coming from the back end of the engine,right beneath the intake??? i have no clue as to what it could be, just hoping, someone might have an idea as to what it may be, also if its serious. thanks.
