Giving the 840 a bit of exercise today.
In 4th gear in the manual sector of the gearbox changed down to 3rd to overtake a truck. Passed him at about 75mph and about to click back into 4th. when the most hellacious rattling sound suddenly emanated from the engine compartment.
Slowed down gradually with the rattle diminishing until Ireached a layby.
Stopped, opened the bonnet, revved the engine, no untoward noises.
Everything seemed to be in order.
Cautiously carried on, and depending on engine load / road speed this bloody rattling (sounds like a stick tied to a bike's front forks) would start up again over approx 45 mph. On a level road I can get up to about 60mph before it cuts in and gets louder in volume but not more intense in terms of frequency.
Definitely not an engine derived problem, not rev related, more simply roadspeed associated. Appears to be coming from the scuttle area around the driver side, but even then seems to shift slightly from centrally to RH side.
Car due in for a service next week, but would hate to give my specialist an open cheque as far as chasing this kind of road based problem.
So, anyone out there experienced anything similar? Thanks.
