My 03 Dodge Ram 1500 w/ the 4.7L engine has developed a tick on the passenger side . Seems to be coming from the valve cover. Lifter/lash adjusters? Tell me what you think. This truck has been babied since purchasing in 03. Oil changes every 3k, maintenance, tune ups..etc..The tick developed recently after a trip out of town to Monterey,Ca. Currently using Mobile 1 full synthetic high mileage 5w-30 and stp oil filter. I have video of it at the link below.