Originally Posted by rxinhed
Pretty sure you should start looking toward worn rocker arms or shafts, or valve stem guides. The guide seals may still be holding out, but the guides 'could' still be worn. And, the 6G72 was never really a quiet engine.

You may be right there rxinhed. The noise has come back to the same area (cylinder #2 area) so I will take a harder look at the rockers and rocker shafts. There is so much hardware you have to take off this engine to get in there is what I hate the most. I have not verified good compression yet. May get to that today if I can get my shop warmed up a bit. At 72 yrs I don't like the cold much. Thanks for reading my post and commenting. Good suggestions!