Callum Trialsin Posted March 17, 2007 Report Share Posted March 17, 2007 (edited) just built my A3 up and its all goo apart from the bb keeps coming loose (after like 2hrs of riding)not really bad but just annoying having to keep tightening it up. My bash ring is bent abit and i was wondering if this would make it slowly undo.Thats the only thing i can think it is, so if u have any ideas on what it is tell me. Also what can i do to stop it doing this?, i was thinking locktight or something but i dont really want to.ITS STILL DOING IT JUST NOT AS BAD, ive taken it out and cleaned basically all of the copper grease sponge put in there and its kinda stoped it but not completely, i still think it might be something to do with my bashring being bent and unscrewing it.Callum Edited March 22, 2007 by Callum Trialsin Quote Link to comment Share on other sites More sharing options...
Greetings Posted March 17, 2007 Report Share Posted March 17, 2007 It is bad, it's VERY bad. That's actually the easiest way to destroy the threads in your frame.I'm not going to give any advice on this matter seeing as 16 hours ago I completely destroyed a bb and a brand new frame. Just don't ride it until you find a solution. Quote Link to comment Share on other sites More sharing options...
Callum Trialsin Posted March 17, 2007 Author Report Share Posted March 17, 2007 ok tanx for that mate, anyone know how to overcome this? might just run without my bash then?Callum Quote Link to comment Share on other sites More sharing options...
RobinJI Posted March 17, 2007 Report Share Posted March 17, 2007 I can't see that the bash would have caused it?What BB is it?Did you greese it up nicely?Did you fit it with the right tool and do it up nice and tight? Quote Link to comment Share on other sites More sharing options...
Sponge Posted March 17, 2007 Report Share Posted March 17, 2007 If I remember correctly, I put a hell of a lot copper grease in the shell, for a good reason.But, make sure to clean out the threads a bit, leaving a thinner layer of copper grease inside. See if this helps:1. Take out the BB2. Wipe down thick grease in the frame shell3. screw in the main cartridge of the BB halfway4. screw the left cup halfway in5 tighten the main cartridge of the BB fully in6. ^do the same for the left cup.Hopefully it should stay tight like that, but as Inur said.. DO NOT ride it if the BB is loose, that is just asking for trouble. Quote Link to comment Share on other sites More sharing options...
eskimo Posted March 17, 2007 Report Share Posted March 17, 2007 It is bad, it's VERY bad. That's actually the easiest way to destroy the threads in your frame.I'm not going to give any advice on this matter seeing as 16 hours ago I completely destroyed a bb and a brand new frame. Just don't ride it until you find a solution.Can't you still use that frame by using a threadless bb?Or as a last solution if the thread can't be fixed buy a bmx euro bb then use that with some Profile flatland cranks. Quote Link to comment Share on other sites More sharing options...
Greetings Posted March 17, 2007 Report Share Posted March 17, 2007 There's still some hope but if it can't get fixed a threadless bb is what will have to be used.Cheers for the advice Quote Link to comment Share on other sites More sharing options...
RobinJI Posted March 17, 2007 Report Share Posted March 17, 2007 I'm not sure of anywhere in Poland, but I know Argos Racing Cycles in the UK will put an insert into the BB shell and thread the insert for 50gbp making it good as new and that's a hell of a lot cheaper than a new frame, or even a second hand one, even after postage to the UK. Quote Link to comment Share on other sites More sharing options...
Callum Trialsin Posted March 22, 2007 Author Report Share Posted March 22, 2007 (edited) Its stil doing it even after cleaning the cooper grease out, im sure its something to do with the bashring being bent and then unscrewing the bb. shall i tighten it up like really tight, ive been told this can destroy the threads though?callum Edited March 22, 2007 by Callum Trialsin Quote Link to comment Share on other sites More sharing options...
downhill_rob2@hotmail.com Posted March 24, 2007 Report Share Posted March 24, 2007 Its stil doing it even after cleaning the cooper grease out, im sure its something to do with the bashring being bent and then unscrewing the bb. shall i tighten it up like really tight, ive been told this can destroy the threads though?callumhaha, your complaining its coming loose, even when you havnt even TIGHTENED it into the frame? it shouldnt rap the threads... just dont do it OVERLY tight! Quote Link to comment Share on other sites More sharing options...
Callum Trialsin Posted March 24, 2007 Author Report Share Posted March 24, 2007 haha, your complaining its coming loose, even when you havnt even TIGHTENED it into the frame? it shouldnt rap the threads... just dont do it OVERLY tight!look ive done it tight trust me but i dont want to f**k my frame up, ill just to it realy tight then Quote Link to comment Share on other sites More sharing options...
Sponge Posted March 24, 2007 Report Share Posted March 24, 2007 (edited) Callum, I might have a few other good theories. But first of all, I can not stress how important it is not to ride the bike when the BB is loose. It's better in the long run to not ride the bike and find a solution, than to waste more time in future trying to repair the frame after having left the BB loose and riding it.First of all, if you've cleaned out the copper grease, and it still has this problem, then look into these:The thing is, sometimes tolerances are 'not 100% correct' (if that even makes sense!) and components when manufactured can be 0.1mm bigger or smaller than what they are labelled as. This is a problem seen on some pedals and cranks, or for seatposts and frame's seattubes. If one is slightly slightly larger than it should be and the other product is slightly smaller than it should be... it means a looser fit than normal. This is common everywhere in the world. Not every item is 100% what they are labelled as. Thus:1. Buy a new bottom bracket, brand new, with perfect threads. (your current BB cartridge body might be literally 0.1mm smaller than it ideally should be, which is sometimes the case on ALL products throughout the world)2. Get the frame tapped/the threads 'cleaned'. Look at the TartyBikes page and go to 'workshop'. Have a look at their BB thread tapping, and it is a safe procedure that makes 100% sure that the threads themselves are perfect. Sometimes a bit of lacquer or the tiniest bit of excess material from manufacturing can upset the way in which threads do their work. Tapping isn't cutting up the threads like hell, it is simply just 'cleaning it up' and getting rid of excess material that might interfere.^Both are very very safe options and is worth looking into.Try both, and if they don't work together (at which point I would be surprised!). Then opt for a bit of blue loctite on the threads... not much, but little enough to keep it locked in and at the same time you don't want too much that'll seize the BB in almost permanently.But as I say, try Option 1 first, if that doesn't work, then go for Option 2. And then finally, try the loctite method. IMPORTANTLY: throughout your entire procedures etc.. you should try and use copper grease because it is simply the only grease that is good for threads as it is an anti-seize compound. I use it because it lets the BB screw in smoothly and it greatly helps prevent any thread damage or stripping. But tighten the BB to a moderate degree, and NEVER EVER do it too tight. "Just about tight" is good enough .I hope your problem is solved fast!EDIT:Show us a picture of the bashring. I think it can only be causing your problem IF the bashring itself (or any other part of your crank for that matter) is rubbing or touching against the bottom bracket's outer cups. I had this problem ages ago when my ACS Claws' removal tabs were scraping against my BB cup, so it unscrewed slowly but surely, because the movement of the cranks from pedalling will cause the cups to move a little as it is scraping against the BB cup. Edited March 24, 2007 by Sponge Quote Link to comment Share on other sites More sharing options...
will69 Posted March 24, 2007 Report Share Posted March 24, 2007 You mught not be doing it tight enough. I can understand you being cautious but as long as the threads arent crossed and you dont go nuts (jumping on a really long bar on your bb tool or something) you should be fine.Also, with the bb out of the frame are the cups stiff to push onto the centre shell? They should need a good tap or a bit of a push to get them seated. if they slide on really easily or slap around on there that could be your problem.Hope this helps, Will Quote Link to comment Share on other sites More sharing options...
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