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intermittent Knocking sound 06gpgt

well i guess this weekend i will be stripping it down. gonna try lifters, rods and rockers that i have from a previous build. maybe that will get rid of this crap noise. anything else guys? second third and forth opinions?
 


id get it knocking again, then listen for the side its on. shut it down while its knocking then take that cover off. look for the really loose rocker.

once you can see its a loose rocker id open it up and do lifters.
 
i did try the screw driver to the ear deal last night. it sounds like its coming more from under the intake and louder on the back side not real definitive though.
 
pop em both off. looks like they are coming off anyways.

i just like to see a issue first hand before i tear open anything.
 


Taking it to a dealer on saturday. Friend of the family works there. Did it end up being a broken skirt on the one you seen come and go?
 


Almost sounds like the balance shaft is hitting something. It's definitely something at half engine speed so it's got to be something in the related to the cam.
 
Like a long red light or just parking it will go away within a minute. I have not a clue. If it does it I can shut it down and start it right back up and it's gone
 


I am not saying it's a lifter, but the sound is not as fast as engine speed the only other possibility is something cam driven.
 
I haven't watched the videos, but I had a nasty sound thst came and went like you describe. It was a cracked flexplate. There's an inspection plate under the transmission. That it off and look inside. You might see cracks at the "windows". Its a somewhat common problem.
 
Was kinda hard to see in there. Only thing I seen were a couple small lines coming down from the middle of it but I couldn't tell if they were cracks or not.
 
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