2004 Mitsubishi Endeavor Upper Engine Noise

drop your oil pan and check your bearings,, also might wanna check to see if the belt is in good shape and if its rubbing on something,, cause it really sounds like a rod bearing going out, also take a screw driver and place the tip to the pan and then to the valve cover and the timing belt cover and see what you hear,,, if you hear some thumping its a rod for sure,, erify this all by visually and physically checking your bearings by hand/eye

Timing belt and idler pully are brand new. Engine sound completely disappears at low altitude. A main wouldn't do this, main bearings are a deeper thumping sound. There is relevance to altitude, what is the secret. I'm aware air is thinner and the car should automatically adjust. Did you look at the video?

lol yeh i watched the video thats how i came to my conclusion,, but ive never ever heard of altitude have any affect of lifter tick though