i've noticed a rattle at about 1250-1400 rpm which last very briefly, i can only hear it when the engine is hot, when cold no noise....if a rev it easily i can hear a rattle occurring somewhere between 1200rpm-1400rpm and then goes away, keep increasing the revs no noise. Going back to idle revs and repeating the procedure i can hear it again, but if i don't let it back to idle revs and keep it at 1000rpm and then rev it back to 1200rpm-1400rpm the rattle doesn't occur anymore....is this normal or is it something wrong with the cams ? i think the noise might come from the chain tensioner....!? i didn't hear it before or maybe i wasn't paying so much attention, if you're not listening carefully you can't hear it, if the stereo is on or the window isn't rolled down no way you can hear it!
i have heard the same noise at the exact same rpm interval on another RS6 and some of the guys on rs246.com have reported this as well...
has anyone else experienced this?