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Periodic clicking in the bottom bracket - Mongoose Cycling

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You could have a tight link in your chain or need a bottom bracket rebuild. To check the chain, put the bike upside down and turn the pedals slowly and watch for one of the links to lift slightly, if it does just work the links on either side until it loosens up. Hopefully that is what the problem is. Now, if it is the bottom bracket, take it in for service because you have to have special tools to take it apart. Good luck

Posted on Oct 10, 2010


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First though you will want to make sure that the clicking noise is in-fact coming from the bottom bracket. Even though it sounds like it is coming from that area there are other things that can cause a clicking noise, such as the examples below.

Front derailleur cable end hitting the crank-arm is a common clicking noise.
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The size of your bottom bracket is related to a few factors:
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2 - Bottom bracket width (your bike is 68)
3 - Crank style and brand. This I do not know for your particular bike as you did not provide the year of the bicycle or brand of crank, and they change.

Taking off cranks and removing and installing a bottom bracket requires many bike specialty tools and is probably not the best project if you have never done this before or own the tools. It will be far less expensive to have your local bike shop replace the Bottom Bracket then to do it yourself. Plus they can tell you what size it needs and if the click is even coming from that part or not.

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Sealed Bottom Bracket: If your bottom bracket is a sealed cartridge unit (as most are nowadays), it can't be serviced or adjusted. If it grinds, wobbles, or catches, it must be replaced as a unit. Just remove the old cartridge and replace the entire thing.
Take the chain off the chainrings, and lay it on the frame next to the bottom bracket. With the bike clamped in a workstand, shove the base of the crank-arms side-to-side to detect motion in the bottom bracket. Now try to pull the cranks away from, then back towards the bike to detect wobble. Turn the crank and listen for noises within the bottom bracket. These tests will help you identify a damaged bottom bracket.
To replace the bottom bracket, you have to do some major stripping! You must remove both the left crank and the right crank arm plus chainrings. See the crank section for additional information.
PLEASE click on the link directly for more help

This will help. Thanks please keepupdated.please do rate the solution positively .thank you for using fixya

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