Got a call from a friend with a noise coming from under his valve cover. Truck is a 2001 F150 with the 4.6 and 250,000 miles. Good oil pressure. Any very common issues with these engines? I know thats a ton of miles....Just had the transmission overhauled 2 days ago. I was thinking maybe a converter bolt loosened, but doesn't make sense with a noise under the VC. Passenger side.