Originally Posted by
HillRider
Assuming your bike has the same M 543 crank as the 2013 model, I wonder how the spindle got scored. It should always rotate in unison with the inner bearing race and could only get damaged if the bearing seized solid and the spindle slipped against the race.
That "weep-hole" looks like it is completely covered by the bb cup's threads so it shouldn't be a leak source. Also, there is an O-ringed tubular shield that should be part of the bottom bracket (part #9 in the Shimano tech document, see below). Was it installed?
http://techdocs.shimano.com/media/te...9830625624.pdf
That's what I was trying to say above. Also if the bearing cups were tight to the frame, there's not much way that the crank could have any kind of play in them because of the way that the spindle mates to the inner race.
I don't know what Trek was thinking but weep holes were dumb back in the 1980s and their are just as dumb now. Perhaps that is a mount for a different cable guide. Either way, I'd RTV it to seal it. It serves no purpose but to allow infiltration of things you don't want in the frame.