Evening all. Right, I am off to my local independent BMW and Mercedes garage tomorrow after work to have this noise diagnosed. I have a feeling I know what it may be, and was pondering as to whether or not any other 6-pot owners have ever had the same problem?
When I start from cold and drive off, after about 1500rpm, I get a audible rattle from the front of the engine, almost like a load of small ball-bearings are rattling about inside a food blender! After a couple of miles it goes away, roughly when the engine temp has just gone out of the blue zone. I never rev a cold engine much above 1500 until it has warmed up, but I have took it to 1800, just to see, and the rattle gets worse and louder as the revs increase. As said, when warmed up, I cannot hear anything like when cold. This has only come on in the last week or so. Can anyone throw some thoughts my way?