illgetyou22

Having a problem with my b6 s4 if i leave the car at idle for about 20 min its sounds like marbles in the passenger valve cover also the car will start running a little ruff. But when i rev the car up hold it at a rev then let it go back down to idle the sound will go away then come back in a few minutes. My guess it the cam adjuster is going bad thats why it will come at idle and go away at a rev but i scanned the car and there are no codes. What do you guys think?

whitehe9

I think I may have the same problem w/ my 05 S4 upon startup. Not every time, but marbles for a few seconds after it turns over. It sounds like something is sloppy in the cylinders. The sound goes away quickly and doesn't come back until the next start, but again, not every time i start the car. Any luck determining the problem?

TECHNAUT

Mine does that too and i can't figure whether it's my JHM flywheel chattering or the old marbles in the engine noise... I did see a youtube video of a guy changing the cam chain tensioners himself with the motor in the car. it's somewhere on this forum.... I have heard that this rattly-cam chain is harmless until it gets REALLY bad.