'71 Nova 350 Auto Knocking

[jcmorozz]

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 videos. Thanks in advance

http://youtu.be/ADcDsm8LkdI
http://youtu.be/thmEplD3eLE
http://youtu.be/WHr6jBLyj4w

 

[zora]

sounds like an exhaust leak to me either where the headers meet the head or the collector gasket. Take a length of rubber hose hold one end near your ear and move the other end around like a stethescope.

 

[jcmorozz]

I will try that..hopefully nothing internal.

 

[Afzimm]

Sounds to me like the fan hitting the shroud, is there clearance all the way around?

 

[Afzimm]

Did you ever find the cause of the knocking noise?

 

[Pit stop]

Sounds like a cracked flex plate or loose bolts .... Very common .