Author Topic: Creak - any more ideas?  (Read 602 times)

Creak - any more ideas?
« on: July 22, 2020, 02:51:56 pm »
My good bike has developed a highly annoying creak.

It happens when pressure is being applied to the drive-side pedal at the 3 o'clock position (i.e. once per revolution).

 - Happens when clipped in or not, on both sides of the pedal.
 - Swapped the pedal, cleaned and greased the threads. No change.
 - Swapped the bottom bracket (it had done 11k miles anyway) and cleaned the BB shell threads. No change.

There's no creak when pedalling using my left leg only, no matter how hard I try.

The creak is slightly worse when in the bigger chain ring.

Any ideas on things to try?  :facepalm:

Re: Creak - any more ideas?
« Reply #1 on: July 22, 2020, 03:12:44 pm »
Chainring bolts?

Front wheel QR?? Srsly. DAHIKT  :facepalm:

zigzag

  • unfuckwithable
Re: Creak - any more ideas?
« Reply #2 on: July 22, 2020, 04:31:59 pm »
i had headset bearings ticking like bottom bracket, stopped after cleaning/re-greasing.

Re: Creak - any more ideas?
« Reply #3 on: July 22, 2020, 04:50:44 pm »
Right Knee ?


Sent from my iPad using Tapatalk

Re: Creak - any more ideas?
« Reply #4 on: July 22, 2020, 04:51:57 pm »
Saddle bolt.

A few years ago I had a bottom bracket creak that I couldn't resolve ... until one morning on my commute when the saddle came flying off as I went over a raised bridge. A bolt had sheered. So the creaking would have been a loosening of the bolt.

Re: Creak - any more ideas?
« Reply #5 on: July 22, 2020, 05:03:17 pm »

My good bike has developed a highly annoying creak.

It happens when pressure is being applied to the drive-side pedal at the 3 o'clock position (i.e. once per revolution).

 - Happens when clipped in or not, on both sides of the pedal.
 - Swapped the pedal, cleaned and greased the threads. No change.
 - Swapped the bottom bracket (it had done 11k miles anyway) and cleaned the BB shell threads. No change.

There's no creak when pedalling using my left leg only, no matter how hard I try.

The creak is slightly worse when in the bigger chain ring.

Any ideas on things to try?  :facepalm:

LH bar end plug should be replaced with one that has been lubricated with lanolin.

Re: Creak - any more ideas?
« Reply #6 on: July 22, 2020, 10:26:38 pm »
Hah.

OK. Narrowing it down.

Press on pedal - creak.
Press on crank arm - no creak.
Swap pedal for another identical pedal - creak on this bike, no creak on donor bike.

So must be some dirt in the pedal threads, right?

LittleWheelsandBig

  • Whimsy Rider
Re: Creak - any more ideas?
« Reply #7 on: July 22, 2020, 10:32:49 pm »
Do you use pedal washers? Lots of grease? Sometimes the face of the cranks can get chewed up a bit, which results in differential contact pressure with the pedal shoulder and potential creaks.

Otherwise, cracked pedal eye? What sort of crank?
Wheel meet again, don't know where, don't know when...

Re: Creak - any more ideas?
« Reply #8 on: July 22, 2020, 10:41:44 pm »
Do you use pedal washers? Lots of grease? Sometimes the face of the cranks can get chewed up a bit, which results in differential contact pressure with the pedal shoulder and potential creaks.

Otherwise, cracked pedal eye? What sort of crank?

It's an ultegra 6800 crank, with M430 pedals.

Normally just a little copaslip & no washers.

LittleWheelsandBig

  • Whimsy Rider
Re: Creak - any more ideas?
« Reply #9 on: July 22, 2020, 10:44:22 pm »
Don’t those cranks break with a higher than normal frequency, mostly from bonding failures?

https://www.bikeradar.com/features/shimano-crank-failure

https://yacf.co.uk/forum/index.php?topic=112701.0
Wheel meet again, don't know where, don't know when...

Re: Creak - any more ideas?
« Reply #10 on: July 22, 2020, 10:53:50 pm »
These creaks are very irritating, I have one I can’t locate at the moment on my utility bike. But just to throw another possibility into the pot, I’ve tracked creaks down to spoke-on-spoke pressure in the past: might be worth going around your wheels giving them a squeeze.

Re: Creak - any more ideas?
« Reply #11 on: July 23, 2020, 12:04:29 am »
Nuke from orbit?
L'enfer, c'est les autos.

Re: Creak - any more ideas?
« Reply #12 on: July 23, 2020, 10:50:04 am »
My good bike has developed a highly annoying creak.

It happens when pressure is being applied to the drive-side pedal at the 3 o'clock position (i.e. once per revolution).

 - Happens when clipped in or not, on both sides of the pedal.
 - Swapped the pedal, cleaned and greased the threads. No change.
 - Swapped the bottom bracket (it had done 11k miles anyway) and cleaned the BB shell threads. No change.

There's no creak when pedalling using my left leg only, no matter how hard I try.

The creak is slightly worse when in the bigger chain ring.

Any ideas on things to try?  :facepalm:

I have same issue. Be interesting to see what solution you come up with

Re: Creak - any more ideas?
« Reply #13 on: August 04, 2020, 01:13:23 pm »
I swapped the crank with an identical one from another bike* and the creak has mostly gone from the recipient.

I haven't checked the donor yet to see if that's ok! Will check it and report back.



*My bike. I didn't just find another bike in the work bike shed with the same crank and swap it over when no one was around.

Re: Creak - any more ideas?
« Reply #14 on: August 04, 2020, 01:37:32 pm »
I had a creak on one of my bikes and I was certain it was the bottom bracket. After watching one of the GCN videos*,
I followed their instructions on what the cause could be. The first thing I tackled was the pedals.
I removed them, cleaned the threads and those on the crank arm and then re-inserted (no particular torque).
 
Rode the bike round the block, creaking was reduced. Went inside, tightened the pedals even more (no particular torque),
rode the bike round the block; no creaks. Problem solved (for me).
* https://www.youtube.com/watch?v=ZEiIFbIklJg

T42

  • Old fool in a hurry
Re: Creak - any more ideas?
« Reply #15 on: August 04, 2020, 01:44:29 pm »
Dry chain?  I had a creak years ago when I de-lubed my chain too enthusiastically and didn't re-lube it sufficiently.  And in fact, having switched to wax lube recently, I'm wondering if I haven't got it again.
I've dusted all those old bottles and set them up straight.

Re: Creak - any more ideas?
« Reply #16 on: August 04, 2020, 01:56:21 pm »
Well, the creak is now on the recipient bike.

Only part swapped was the [BSA hollowtech axle, chainrings, crank arm] so the creak is in there somewhere.

Will dismantle and clean the chainrings next to see if that helps. Otherwise it's £150++ for a new chainset which is a bit of a pain.

Re: Creak - any more ideas?
« Reply #17 on: August 04, 2020, 02:03:29 pm »
It's gotta be chainring bolts, surely ?
Rust never sleeps

Re: Creak - any more ideas?
« Reply #18 on: August 04, 2020, 10:31:55 pm »
if you have not yet done so clean all the chainring interfaces and reassemble everything clean and dry apart from the male and female threaded parts in the chainring bolts; these should be greased.

If the creak still persists then it might be either

a) the crank cracking and/or coming unbonded along the seams or
b) the crank loosening where the BB spindle is bonded to it.

cheers