I have a Shimano R600 compact crank on a 2011 Trek Madone. @ 100 miles it started clicking. The LBS packed it full of grease and problem solved. Now @ 2000 miles it's back. So while pulling the crank the preload cap was super tight requiring a channel lock on Park's spinner to get it loose. Shimano says 6-13 inch / lbs. This had to have 50 or better. The outer seal showed some deformity but I went ahead and took it and the inner seal out, packed her full of Park grease put it back together using the recomended torques. Clicking remains.

New BB time? If so Is it worth it to go beyond a Dura-Ace replacement. $30 dollars doesn't seem too bad. I'd rather not be doing this every 2-3 months but if that's what it takes then so be it.