Yes this appears to be related only after the engine warms up. I have tried to determine the location with a stethoscope but was unable to locate it. While making the videos it did sound like it was coming from the rear of the engine around the #5 cylinder. I did find that #1 injector was pretty loud. I am running the dino Castrol 10W-30 and at this point I have about 300 miles on the engine. This is the 7th oil change and have tried Marvel's mystery oil and LUCAS. I hope to change the oil within the next couple of days back to straight 10W-30. Also several people have recommended running 10W-40 and Rotel 15W-40 to see if that helps. Also I plan to run to Harbor Freight within the week and pick up a couple of the stethescope for me and my friends. I have been using another friends who is alos a mechanic and he was unable to locate the noise and he suggest that it is a lifter issue. Thanks for your reply
