I haven't seen Andy's Vibration post for a bit but I hope you're getting something sorted?
This is not about that, but my 'no part number' noise and so to not keep hijacking his topic.
I think I got it sorted,
Background- as I was priming the oil system by slow kick pedal I detected a barely audible metallic rapping sound in area of Roller main bearing, but which became louder as the oil came through and I kicked harder.
Did some elimination and pinpointed it as only at ~BDC. Being at change of direction of 'reciprotation', figured it must be something to do with big ends(new rods & bearings) or R.main, so stripped it down again, replaced the roller, and on reassembly, noticed a shiny patch on outer rim of the (new)seal
Conclusion- even though I ran a gauge around there and it seemed clear, the outer face of the back of the sprocket against the splined sleeve seemed to have small divot and bumps(or is that a davit), and maybe seal was not sitting fully home square, so at one point each revolution gave the seemingly appropriate 'metallic chink' , which would've eventually gone away, but.....
Cleaned face of sproket on a sheet of w/d on glass, so hoping all should be ok.
that's the short bugga story..... I think I discovered I need a better crank
Happy hoho HumBugga season (nicely), and thanks for the prior input
duTch
Oh yeah- I never really thought of it as a Roller bearing noise, as I've always had the impression a shot one of them (generally) produce an audible rumble not a knock..(?)
