Clicking noise on mates bottom bracket.

keirtristan

A mate if mine has a spesh Rockhopper and has noticed a a clicking sound coming from the bottom bracket after one full revolution of the pedals.

Any idea what this could be? He can't really afford a lot of money to get it fixed and has borrowed the tools of someone else but really can't get the bottom bracket out so how much should he be paying if he has to replace the bottom bracket and getting a shop to do it for him?

LDNTrailRider

Probably knackered. Is there much lateral movement in the cranks?

Should cost about £25(ish) + parts.

keirtristan

Cheers LDNTrailRider. I'm not certain if there is any lateral movement in the cranks, he didn't mention it. We sort of came to the same conclusion but neither of us know much about maintaining bikes so nice to get a 2nd opinion.

Will let him know how much it's likely to cost. As he wants a respray and will have to get that fixed he is considering just stripping the good parts off and getting a new bike when our company gets round to starting the C2W scheme, will just depend on how long he can resist getting up to Sherwood Pines.

Kiblams

Is it a square taper BB? Mine is and every so often I have to take the cranks off, clean and grease where the cranks meet the BB, after a while I tend to get creaks and clicks on the BB area again and have to repeat. One of the side effects of being cheap

If it's a different type of BB, this most likely wont be the issue.

LDNTrailRider

If you're trying to remove a BB, remember that the drive side has a reverse thread. So you have to turn it clockwise to loosen it.

Go to the Park Tools website for more help.

They can be a beatch to remove though if you don't have a full workshop to play with!

Banned!

if you do have trouble getting it off, spray it with wd40 and leave it overnight on its side.

cat_with_no_tail

Woah woah woah. Before you start taking cranks off and messing with BBs etc, have you checked the pedals?

I know LOADS of people (myself included) who have heard the exact same clicking noise. For me, it was at the start of the downstroke on the left hand crank.

Easy way to check is to take off the pedals, put some other ones on, go for a quick test ride up and down the street. If the clicking stops, it's your pedals, if it carries on, it's something else and THEN you can start stripping down cranks and BBs etc.

If it's the pedals, strip them down, clean/re-grease everything and put them back together again. From the reports I have seen, Shimano M520s are particulatly bad for the clicking noise.

There are a load of topics about this in the workshop forum if you want more info.

daniel_owen_uk

For getting bb out I found easiest way by far was putting BB tool in vice and turning frame, really struggled to get it out before.

Removed it the other day by putting in the vice and it came out no problem at all.

keirtristan

Cheers guys. He told me today that his missus must have received a knock to the head as she thinks it's a good idea for him to get a new bike.

He is going to wait for a company to set up the C2W scheme and get a new one.

paulfitz

My 2-month old scott is making this noise aswell - most of my riding is along a shoreline embankment, so it is a sandy trail, so ive got a feeling some sand has got to the bearings and drank the grease or something.

Its in for its free service at the moment, and i told them about it, so im hoping it'll be click-free come monday.

KonaKurt

I agree with Cats, that this common problem often turns out to be pedals rather than BB's. Either run it down to a good shop for a checkover, or check out the FAQ's and tips within this forum. There is one about drivetrains making common noises, and how to resolve them. (just click 'mountain bike', and look at top of topics list).

On the subject of super reliable and maintainance free (almost!) pedals, I very strongly recommend DMR V8 or DMR V12 pedals. So durable and very easy to lube/maintain.

KK.