Mark w Posted August 29, 2016 Share Posted August 29, 2016 Scott that's great , thanks .Now just need to find a supplier . Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted August 29, 2016 Member Share Posted August 29, 2016 Namrick?Jonathan Link to comment Share on other sites More sharing options...
ScottR400D Posted August 29, 2016 Share Posted August 29, 2016 Namrick would be a good place to try; I got them from a local fastener supplier. 35p each and you can check dimensions. Link to comment Share on other sites More sharing options...
Mark w Posted August 29, 2016 Share Posted August 29, 2016 Bolts purchased .Socket purchased , Fingers crossed .......... Link to comment Share on other sites More sharing options...
ScottR400D Posted August 30, 2016 Share Posted August 30, 2016 Take it steadily and make sure socket is square on to bolt as you undo with as long a wrench as you can get, to improve control. Two people, one ensuring socket is located and one turning is best. This is assuming you have similarly poor fitting socket and tight thread locker. Link to comment Share on other sites More sharing options...
Mark w Posted April 1, 2017 Share Posted April 1, 2017 Well I didn't get this done over the winter so started today .The two near side ones came out relatively easy , that may have been because Caterham changed the caliper under warranty .The off side was a complete bu33er . One bolt is now out but the other gave up half way out . The end is completely rounded and won't budge at all . Tried cutting a slot in it but can't effect enough torque to turn it . Have given up for today . If anyone in NW London ( Pinner ) has a welder handy I guess I could try that . Alternatively I may try to drill the head off and then try and get the stud out with some Stilsons ( although I worry it may be too stiff for that ) Ridiculous design , three cap heads now in use .... Link to comment Share on other sites More sharing options...
ScottR400D Posted April 1, 2017 Share Posted April 1, 2017 Not good is it? God knows what retaining compound CC use. Anyway FYI, as said earlier, exactly the same happened to me. A nut was welded to the damaged head and it came out like that. I replaced with 12.9 capheads which work fine. Link to comment Share on other sites More sharing options...
Mark w Posted April 1, 2017 Share Posted April 1, 2017 Yep 12.9 capheads in the first three . Link to comment Share on other sites More sharing options...
Jh roadsport Posted April 1, 2017 Share Posted April 1, 2017 Anyone tried to remove with an impact wrench? My car gets built in May so I will be in touch with caterham to see if they have rectified this issue. Link to comment Share on other sites More sharing options...
ScottR400D Posted April 2, 2017 Share Posted April 2, 2017 From my experience I would think an impact wrench would simply guarantee and hasten the damage to the heads. The problem is getting a well fitting socket but CC don't appear to know or possibly care what it is. Presumably they aren't doing the initial assembly. Your best route would be to try to get capheads fitted in the first place. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted April 2, 2017 Member Share Posted April 2, 2017 The problem is getting a well fitting socket...Has the type and/or a suitable tool been identified? Would anyone lend it?Jonathan Link to comment Share on other sites More sharing options...
ScottR400D Posted April 2, 2017 Share Posted April 2, 2017 Good question. As far as I know it's still a Torx E12 or EP12. However, though the latter fits better than the former, neither are a good fit. It left me wondering if it's something other than Torx. I have the EP12, which I'm happy to lend, but they're not expensive. Peter Link to comment Share on other sites More sharing options...
Mark w Posted April 2, 2017 Share Posted April 2, 2017 Well ive sorted mine now , what a job , had to drill the head off in the end .Even with the caliper removed it was still a job to remove the rest of the bolt . Whilst the head isnt a great design to apply a large amount of torque through the problem seems to be the strength of the threadlock used .REALLY difficult to turn it even though there was only about 5mm of thread left in the upright .Have replaced with Capheads ( and some sensible threadlock ) Link to comment Share on other sites More sharing options...
Jh roadsport Posted April 3, 2017 Share Posted April 3, 2017 Hi I spoke with a technician at caterham dartford and they said they have not heard of this issue. Not from customers or the caterham dealers. I explained I have a build slot soon and that was my concern that I don't want to suffer these issues. They said there's no issue and nothing to worry about.. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted April 3, 2017 Member Share Posted April 3, 2017 How about asking them what the socket fitting is and why they use it? (My guess is that there isn't a deep reason and that it was used in a previous application or similar.)Jonathan Link to comment Share on other sites More sharing options...
Mark w Posted April 3, 2017 Share Posted April 3, 2017 Speak to the Mark in the service dept at Crawey and he will tell you they can be a bu33er to undo .Has the chap at Dartford actually disassembled one after 2 years and several thousand heat cycles ?Maybe they have changed the threadlock they are using now ? JonathanThe socket isnt the issue , i have the one CC told me was needed . The issue is that the bolt head is softer than the torque required to resist the threadlock at the other end . Thinking about this laterally you can actually remove the pad pins if you remove the mudguard stay , given the fact that i had to remove this to drill off the bolt head it might be an easier option for those who are concerned about trying to remove the caliper , leave the caliper fixed to the upright and remove the stay to allow the pad pins to be removed . Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted April 3, 2017 Member Share Posted April 3, 2017 The socket isnt the issue , i have the one CC told me was needed .What is it, please?Jonathan Link to comment Share on other sites More sharing options...
Mark w Posted April 3, 2017 Share Posted April 3, 2017 Hi Mark,It is E12 however you should not need to remove these to change the pads. If remove the clips and pins the pads should come out.Regards,JamesJames Gibson Warranty Manager Caterham CarsKennet Road, Dartford, DA1 4QN, UK E: james.gibson@caterham.com | T: +44 (0)1322 625804 www.caterhamcars.comOf course he was wrong about not needing to remove the caliper to change the pads and corrected that in a later Email . Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted April 3, 2017 Member Share Posted April 3, 2017 ThanksJonathan Link to comment Share on other sites More sharing options...
John Vine Posted April 5, 2017 Share Posted April 5, 2017 Has anyone tried applying a little heat to soften the threadlock? That trick works well with the eyes on dampers.JV Link to comment Share on other sites More sharing options...
ScottR400D Posted April 5, 2017 Share Posted April 5, 2017 We tried that with my damaged bolt. Put a lot of heat in the bolt itself but it didn't seem to have any effect on the thread locker. The image shows the end of the damaged bolt heated. Link to comment Share on other sites More sharing options...
Mark w Posted April 5, 2017 Share Posted April 5, 2017 Thats not hot Link to comment Share on other sites More sharing options...
ScottR400D Posted April 5, 2017 Share Posted April 5, 2017 Not enough for the thread locker anyway!! ;) Link to comment Share on other sites More sharing options...
elie boone Posted April 6, 2017 Share Posted April 6, 2017 I never used any tread lock on a caliper bolt, and never has a bolt undoing itself, so can't see the point of using tread lock. Link to comment Share on other sites More sharing options...
Mark w Posted April 6, 2017 Share Posted April 6, 2017 Eliedo you have radial calipers ? Link to comment Share on other sites More sharing options...
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