Ticking or Rattling noise In CYL #1

[Waterloo]

I wonder if one of the gears in the front structure are not the source of the noise. I had a split gear in my CM-871 on the injector cam. It had the pre-load springs on it and they were all lose rattling around, the gear had skipped a tooth. Also, no Loc-Tite 609 was used on the tapered end of either of the camshafts. We replaced that split gear with a solid gear. I know you have the single cam 2250, but still would be worth checking, along with the gear lash.