Valve Noise
This is the first case I've heard of on the E55, but it's worth a shot. I wish I could tell you what the process is called but it escapes me. Maybe do a search on the net for it.
-m
It's probably what's infamously referred to as "lifter tick". There's a process available (the name of it escapes me) where they will drain the oil out of your motor and hook up a machine that will run solvent through the block and head to break up carbon and sludge build up. On my old 3000GT VR4 lifter tick was pretty notorious because the lifters themselves had very small openings in them to allow oil to pass through and lubricate them. They'd clog very easily and you'd get lifter tick. I had this process done at the Mitsubisihi dealership by me and it did a good job of alleviating the problem.
This is the first case I've heard of on the E55, but it's worth a shot. I wish I could tell you what the process is called but it escapes me. Maybe do a search on the net for it.
-m



