Almost positive that is not engine knock or ticking. It sounds like an accessory problem for sure. If this was spark plug or internal issue it would sound worse
If you look really close you can hear the tick tick tick tick every time the white label on the belt flashes by.
However it will be a guessing game until you can get in there, remove the belt, and check all pulleys. Don't keep driving it much because if it is your fan belt about to let go that would suck, although your video doesn't show much wobble, with the belt removed it may reveal itself.
- Remove belt.
- During this first step you can feel for proper tension on the tensioner assembly. It should provide a good amount of spring back and it shouldn't feel like it's binding up or sticking
- Start engine and see if noise goes away.
- If it goes away, then it's accessor belt related. If it doesn't go away, then you have a timing belt component issue or something deeper like you initially suggested
- Assuming it goes away, start to spin and check each pulley. They should feel smooth with no free spin ( think old skateboard wheel, this is no good )
The fan bracket can't really be tested since its tucked away but like suggested above, if it's really shot you can grab it and check for wiggle
It sort of sounds like something is physically contacting the belt but I doubt it. Doesn't really sound like bad bearing but hard to tell in a video.
Post back here if you have questions and need info on how to remove belt and check further.
Question : When did you first notice the issue? Oil change 1500 miles ago, did you do it? Was it OK after that or did you just notice it now? Is the noise posted in the video what you referred to as a knocking noise or is this different?
