Timing chain rattle at low rpm

[LJDB 103]

My engine started making a rattle just above idle. Sounds like timing chain so I reset the tensioner and it was worse. Pulled the rocker cover off and I can see the guide on the tensioner side vibrating back and forth at that rpm causing the noise. Timing marks are still fine and the chain doesn't have excessive slack. It funny that at idle and above around 2000rpm it doesn't do it. I tried another used tensioner and tension with a screw driver feels stiffer but it still rattles. Not sure what it might be. Oil pressure looks fine although there isn't a lot of oil sling off the chain when revving.

[bear351c 10,270]

Loose bolts on the flexplate.........??  Sounds very similar. Goes away at speed as the torque increase. Rattles like a bitch at idle.