I made the mistake of dismantling the headset on an 80s Centurion. There was this little rubber o-ring in between the fork crown cone and the crown race. It was not a complete ring, but rather a small strip of rubber that fit into a tiny groove at the bottom of the race. Now I can't get the rubber part back in--I think that it needs to be stretched tight into the groove, but I really can't figure out how to do that.
If I just put it in and re-install the headset, will it work its way back into the groove? Or is it supposed to be a true o-ring, and therefore it's broken? If yes to the second question, is there somewhere I can get a replacement for this? Or can I just chuck the rubber seal? Or should I just install a new headset--I have a cheapo one, made of CrMo, I think, that looks fine.
Help! I just want to get this puppy re-assembled!