C&V - Click in Bottom Bracket
'84 Super Course. Stock bottom bracket, 52x42 chain rings. The BB spindle appears to be about 150mm total length.
This morning, I began hearing a pronounced "click" each time the pedal passed over top dead center. Later the click would be slightly past TDC, but it did seem to coincide with the crank revolution.
Pulled the crank off this morning and inspected the bearings and retainer rings, and I THINK I may have found the problem. One of the bearing retainer tabs had lifted and cracked slightly (too small to see in the photo below). I'm guessing this is the source of the noise.
Could not feel any bumps, scratches or divots in either bearing race. So I suppose I'll just replace both bearing sets, re-pack it all with grease and give it another go, hoping I just got a bad bearing/retainer set.
Wondering at the cause. DB