[D7N7MASTER]

I took it to John Dayton Enterprises in Signal Hill. Recommended by a co-worker. He kept it all day. Checked /adj. valves. All were within .002". When I went to pick it up it was still on the rack & idling. John said the noise comes and goes. Guesstimated that it might be a worn valve seat or crank bearing - but couldn't say what it was... Above an idle & you can't hear the noise anymore. Suggested that I check crank end play and adjust if required. Can end play change??? It has no appreciable power loss that I can tell, idles great - once it's warmed up - then there's this annoying noise. Maybe I need larger speakers????