Weird Rattle

[cattivo_69]

Hi guyz,

Have been hearing this like rattling or worn bearing noise comin out of my rb20det recently.

It doesnt do it on idle, just when u start to bring the revs up it gets to bout 3500-4000rpm and it starts, sounds like the noise it comin from up top but i dunnoo

In 1st and 2nd gear as u creep up the revs slowly u hear it allot but when ur crusing at 60kms say in 4th u hear nuffin.

Im confused....

ive checked oil, that seems fine...

any ideas?