Knowledgable chaps! Help needed.

Is there anyone knowledgeable free around Surrey Quays area to have a quick look at my bike and potentially diagnose a fault? Ive checked all the mechanic/fixing boards and im just not knowledgeable enough and i dont want my pants pulled down when i take it a shop.

Basically, creak/crunch from around crank and bb area. Doesnt do it when coasting, just when you apply force/weight. More force you apply the louder the noise. Doesnt creak when you dont peddle. No lateral movement by hand, slight flex when applying force (is that normal?). Have noticed that the crank teeth are not centre in the chain but rather to one side.

Its a square taper bb, with Pro wheel 170mm cranks, Shimano 46T chainring and a Halflink chain.

Ive Checked all bolts are tightened. Checked spokes are tight. Tightened and loosened the chain to no affect. Checked pedals and one does have a ever so slight play but thats silent.

Help :(

OH! Also, anyone know a good mech around the south east area?

Thanks

C

last time this happened to me it was loose pedal seals/nut things. tightened them up and creaks went bye bye.

Access to spare pedals ? swap and try other pedals, at least rules them out and narrows it down.
Could be BB on it's way out, or it just needs taking out, grease the threads and try again, could be the crank has worn, worked loose at some point and the BB taper has eaten into the interface.

Turn the chain round for better aerodynamics and ride so fast you can't hear the noise.

Good mechs in SE? Head to Cycle PS Camberwell or Battersea.

My internet diagnosis? Remove both crank arm bolts, clean the bolt and crank threads so they are spotless. Grease them back up really well, tighten to the crimp and hopefully you'll be noise free.

Knees?