I've been trying to get rid of this tick for the past 5K miles I believe . I don't believe it is possible without Major repair. Im just here for some assistance on what it could be? I've tried lucas and mmo(helps in gas tank) and other snake oils (currently running Auto-Rx plus) but nothing will make it go away.

Car just hit 164K
Been happening since about 159-160

Here is a video of the sound:

Appreciate if someone could embed

 

sounds like the timing chain tensioner or maybe the timing chain guide