knocking

Can anyone give me there suggestion what this Knocking is? I checked out the roller rocker and none seem lose and all the rods looked okay? Possible something to do with the automatic transmission plate? The Noise as seemed to got worse after I took the rocker covers off. I posted three...

I have a 2002 Chevy Cavalier with 128k on it. Its been a good little car for the 3 or so years that I have had it. A few months after buying it I started noticing a problem. It would randomly cut out pulling in to or out of a parking spot. Eventually I also found that if i was parked and I...