Quote:
Originally Posted by Andruha
I have X5 35d with just 1,300 miles on odometer. During break in period I was quite gentle with acceleration. 2 days ago I decided to try accelerating a bit harder and noticed that between 2,500 and 3,000 RPM engine makes knocking sound that reminds me valve knocking on older cars. After 3,000 RPM it goes away. On park there is no knocking sound and engine runs smoothly at any rpm. Is it possible I got bad diesel at a gas station? Has anyone with a diesel experienced the same? Just a thought of something being wrong in a new, 1 month old car is driving me crazy  TIA |
If revving the engine in park doesn't cause the knocking noise to occur then it doesn't sound like an engine issue to me otherwise you'd expect it whether you are driving or stationary. It sounds more gearbox or drivetrain related.
Does it occur in Sport or Sport+ modes?
I've had my 40d for nearly 8 months now and have 13,000 miles on it with no noise issues.