Here's a piccie looking inside my BB i see there's a small line running diagonally across the inside, now the past couple of weeks i've had a really bad creaking noise coming from the BB area, checked all the usual suspects cranks,pedals,seatpost etc so could this be the cause or is it just a join in the metal ?
still don't know what is was, but it least it's gone, i was 100% certain it was the BB
good job i don't work in a bike shop.