Constant clicking on left side of BB

cjcp
cjcp Posts: 13,345
edited March 2010 in The workshop
It happens on my Ultegra chainset/BB combo, but not my RaceFace combo.

It's not the saddle or the pedal. I took the left crank off tonight, lubed it and sat on the turbo for 30 mins to test it. No clicking. So far - I expect it to start clicking during this week's commute.

Is this clicking caused by a knackered bearings in the left BB cup? There was a very small amount of play in the crank when you try to move it laterally, but I can't see why that would cause the clicking.

Grateful for some thoughts before I buy a new BB. Or a new bike :P .

Cheers.
FCN 2-4.

"What happens when the hammer goes down, kids?"
"It stays down, Daddy."
"Exactly."

Comments

  • nicklouse
    nicklouse Posts: 50,673
    add preload to get rid of the sideways play first. (should be none)

    then check pedals.cleats. and then bearing cups.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • cjcp
    cjcp Posts: 13,345
    Cheers, Nick. I'll see how it runs on tomorrow's commute to see if futher fettling is required.
    FCN 2-4.

    "What happens when the hammer goes down, kids?"
    "It stays down, Daddy."
    "Exactly."
  • itboffin
    itboffin Posts: 20,072
    CJ have you tried loosen off the bolts, I had the same issue on my 105 BB, took the whole lot out greased stuck it back, it was good for a few miles then the tick/click came back, in the end I loosed off the tension, noise gone.
    Rule #5 // Harden The Feck Up.
    Rule #9 // If you are out riding in bad weather, it means you are a badass. Period.
    Rule #12 // The correct number of bikes to own is n+1.
    Rule #42 // A bike race shall never be preceded with a swim and/or followed by a run.
  • cjcp
    cjcp Posts: 13,345
    Hmm. I tightened the bolts to reduce the play. Had to do it again this morning before I set off on the Surrey Rumble, although there was no clicking. I did wonder if it was the result of that plastic, black hook thing being in the wrong position. Will see how it runs this week.
    FCN 2-4.

    "What happens when the hammer goes down, kids?"
    "It stays down, Daddy."
    "Exactly."

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