Ticking or Rattling noise In CYL #1

[tbrink54]

How would I isolate it?

I did run the Rack, Exhaust side was off but not much. If you have a Long thin Screw Driver, Go to the Bottom of the head under the valve cover you cant hear hardly any thing, The farther forward on the Rocker shaft to the Front cover the louder it gets. Again most people wouldn't know there was something wrong.

Cam gear Retainer? As far as I knew it is more or less pressed on and lock tight. I will say after I your question, I did go bar the engine more, back and forth, there is play, But the all have some. I hear you can get noise if there is too much but never hear it could knock, or Tick. Is it possible that the play is causing the cam to snap around and and just clink when the gears re-mesh?