[Sanzomat]

My new 2.0d V70 is making a sound very much like pinking (I thought that only petrol engines pink) It happens under moderate throttle/load between about 1500 to 2500 rpm. The volume of the noise is directly proportional to throttle position - more throttle louder noise, foot off, no noise. Even on cruise at a steady speed you can hear the noise come in when you go up an incline. Once you get above 2500 it pretty much goes. It does not seem dependant on temperature (not that I can tell as there is no temp guage on new V70s) but it happens from a cold start or when the car has been running for hours in the same way. Its pretty loud and can be heard easily over the radio. It is accompanied by a kind of whistling sound, almost as if the exhaust is blowing but as it very quiet when not on the throttle or even at higher revs I can't imagine its that. Anyone got any clues? Its going in for its 3000 mile "quality check" service next week so hopefully they will sort it but I wouldn't mind getting some points of view beforehand.