Rear Main Bearings

[Bob Culver]

Hi David
 
I trust your scrap bucket is the diy owners sort and the contents never get discarded.  Sometimes a sliver of mild steel can get rolled into a track. If stood for decades could even be some varnish like buildup. Try soaking in paint stripper and see if improves. If worn to unacceptable degree the outer ring likely visibly worn. If convinced it u/s grind away the rivets and dismantle. (The rings are handy as very parallel spacers etc) If barely worn keep the outer ring; it might form a tight match with some other old inner!