I have a creaking bottom bracket. Some history. I began hearing a creak earlier this summer. I have replaced the pedals, crank and bottom bracket and shortly after doing so, the creaking returned. It occurs on different chainrings and different cogs and even with a different chain.

I have torqued to specification, used teflon tape and when that didn't work, grease things up well. Most recently I used permatex purple threadlocker (low strength) on the threads as per http://www.parktool.com/repair_help/FAQcartdg.shtml.

I applied threadlocker to the bearing cup and bearing body in addition to the threads on both sides. Still creaking. It usually makes a single creak on the downpedal on the left side. It only creaks on the down pedal of the right side when I am really pushing down hard. What should my next step be?? Thanks for you time and advice.