Strange Metallic Whirring Noise

[ame="https://www.youtube.com/watch?v=oeoDAjDApkU"]Strange noise #1 - YouTube[/ame]


Here is a link to a video of the noise. Again, this has occurred for the past year, with the previous 904 and with the current A-833. Oil pressure has remained the same and great. Will start quiet in the morning, but noise begins a minute or two after out of the garage. If you let it idle for a few moments, the noise will stop again, until you revs are brought up, or you begin driving. Clutch depress has no effect on it. I do not notice any debris in oil and no visual movement of the crank upon revving the engine in neutral.


When the noise does occur, it varies speed with engine speed.