Quote Originally Posted by Gable74 View Post
LOL...yes....I pulled the pin. The tensioner had plenty of force on the pulley so I am 99.9% certain that its good. What has me confused it that the sound is rapid like you would hear from a lifter even though this engine does not have lifters. In my experieince a rod knock is a deeper sound and less frequent. Just for giggles I am going to pull the serpantine belt this weekend and verify its in the engine and not an accessory.
Our engines do have lifters, but they are solid (not hydraulic) shim in bucket style lifters that have to be checked and adjusted from time to time.

Adjustments are done simply by measuring the clearances of the current shims, then replacing the current shim with another slightly thicker shim that has the correct additional thickness to take up any extra required clearance as measured.

It's the same type lifter setup found in many motorcycles.

Hard to say for sure though, since I also saw a Youtube video where the problem ended up being a valve cover gasket that was leaking, and I'd swear that noise sounded very similar to the one in your video.