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Hearing a faint metallic whine
I have a 6MT 228i 2016 which just passed the 1200 mile mark. I have just recently noticed a faint metallic whine as the RPMs go up. It is really hard to pinpoint where it's coming from. Basically, when I am shifting through the gears and as the engine speed goes up, the whine pitch also goes up. It does not sound like the usual engine noise to me. Sorry for the vague details as i don't even think a audio recording would be able to pick this up. At first, I thought it was just the turbo spinning up but I am not exactly sure.
Is this something of concern? Please let me know.
Thank you
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