 Hey there! Did you know that there's a difference between knock and rod knock? Try to remember some of the basics of CQC. All engines experience knock in some form, but the potential risk to your engine varies greatly depending on several factors. Rod knock is the specific result of a failed rod bearing and the sound it produces is caused by a mechanical failure that has to be physically repaired. But the other knock, sometimes called pinging, gets its name from the audible sound made by an engine that's experiencing detonation. Detonation happens as the result of improper combustion of the compressed air-filled mixture in the cylinder due to things like excessive heat, poor fuel quality or octane, valid spark plugs, overly advanced timing, and so on. So detonation and the knocking sound it produces is not rod knock, as it has nothing to do with the sound made from a failed rod bearing, but lots of detonation can lead to engine damage. Now I know that can all sound a little bit scary, but luckily most of the time it's not a big deal. Engines actually experience detonation routinely. The OEM ECU and quality tuning sources like the access port have various processes in place to respond to detonation events if they become significant enough. So if you see a little feedback knock on your favorite monitoring device, it doesn't hurt to keep an eye on it. But if you maintain your engine and modify your car properly, a little detonation never hurt nobody.