Originally Posted by
MudPie
In general, thread locking compounds are not a good idea, especially on threaded joints that are preloaded (ie torqued to some ft-lb spec). Actually, I grease my BB threads (somewhat the opposite of a locking compound). I assume the shop is somewhat competent and can torque the BB cups to specification. As Sci-Fi suggests, teflon tape may help.
X2 on the grease. On my last frame I used teflon tape, and it worked great. On my newer frame, the tape was making it difficult to install the bb, therefore I used grease only for the application. I even grease the crankset bolt, even though the LBS recommended I loc-tight it. I ensure the right amount of torque on the bolt, and I have never had a crank arm come lose on me. Then again, I'm pretty anal about maintenance - every bike gets stripped, lubed, and screwed, every year. Things rarely come lose
