I have a 2005 Range Rover (74K mi bought new) with what sounds like a loose metal noise coming from engine on the passenger side. Not like a lifter, but sounds like there would be a loose nut inside the lower half of engine and seems to lose power on highway.
(under warranty thankfully) Have had the cat covert replaced, radiator, coil packs, oxy sensors, front diff recall, axle shafts, oil pump, steering rack, power steering pump, EVERYTHING. Has anyone or does anyone know what might be the problem or suggestions for this noise.