Resident Rocket Scientist
I'm not sure if this is peculiar to the 6 liter or not but I've noticed some lifter noise / clatter when I first start the engine. THis is a daily driver so it doesn't sit for long periods of time. My thought is that the valve lash adjustment is not quite what it should be since the hydraulic roller lifters should bleed down that much overnight. Haven't been to the dealer yet so I thought I could get some good info here first.