homerbw wrote:
Thanks everyone for your replies. If I had to make and educated guess, the sound is more associated with the valves. Once I make speed, it stops chattering and even when I do stop and go city driving there is no chatter. It only happens when I stop after driving awhile. The engine has 69,000 miles.
At 69,000 miles I don't think its the valves, it does sound like the timing chain tensioner has gone bad, there is a YouTube video about this on the Ford Triton motors and the chatter does go away after the motor has been warmed up and the timing chain does effect the camshaft that operate the valves..
Here is the video about the issue and does apply to the V-10 as well, he describes a chatter noise at start up but goes away after warm up
https://youtu.be/eOIvT_NsCbw