Author Topic: Broken/Snapped Engine Mounting Bolt  (Read 5023 times)

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  • Offline paulg027

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    Offline paulg027

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    Broken/Snapped Engine Mounting Bolt
    on: Jul 09, 2018, 10.32 pm
    Jul 09, 2018, 10.32 pm
    So, I eventually got round to fitting my Hepco and Becker bash plate to my CT.  Unfortunately, when I was attempting to undo one of the engine mounting bolts it just snapped off! I have no idea how to remove the end of the bolt that still remains in the engine.  Any ideas, or is it a n expensive trip to the Honda dealer?

  • Offline Yasko   england

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    Re: Broken/Snapped Engine Mounting Bolt
    Reply #1 on: Jul 10, 2018, 06.31 am
    Jul 10, 2018, 06.31 am
    Have to drill it out very carefully  :169:. MCN did an article on that a few weeks ago, check on line or Google it. I have only tried it once years ago (Ford Consul) and buggered it up  :005:
    Bill

  • Offline paulg027

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    Offline paulg027

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    Re: Broken/Snapped Engine Mounting Bolt
    Reply #2 on: Jul 12, 2018, 08.46 am
    Jul 12, 2018, 08.46 am
    Bill, I tried googling the MCN article, couldn't find anything.  I went to my local Honda dealer, and spoke to one of their technicians who had not come across any engine bolts shearing off before.  he recommended that I book it in for repairs.  They said I would be charged £82 per hour in labour and said it could take 2 days! I ordered a replacement bolt which was £17 and I have borrowed couple of bolt extractor tools to have a crack at removing it myself.  I will let the forum know how goes!

  • Offline Yasko   england

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    Re: Broken/Snapped Engine Mounting Bolt
    Reply #3 on: Jul 12, 2018, 09.00 am
    Jul 12, 2018, 09.00 am
    PM me with your address and I will post to you if you want
    Bill

  • Offline sire

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    Re: Broken/Snapped Engine Mounting Bolt
    Reply #4 on: Jul 12, 2018, 02.31 pm
    Jul 12, 2018, 02.31 pm
    How much bolt is left exposed? I've had great use out of Irwin extractors (sold in Toolstation), but they only work if there's a bit of bolt sticking out. I have also drilled out bolts and used a pick to clean the threads of the casing. Worst one took me about 90 mins and several drill bits. Never had much luck with the tap/die style extractors. Good luck.

  • Offline hoppicker   gb

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    Re: Broken/Snapped Engine Mounting Bolt
    Reply #5 on: Jul 12, 2018, 06.51 pm
    Jul 12, 2018, 06.51 pm
    May i suggest this is not a job for the average Honda technician who spends his time looking at diagnostic screens and fitting new parts out of a box. Its a job for a good old fashioned Engineer, who, if he does need to resort to using a drill Knows how to use it. They are few and far between these days. Over the past 50 years I have rescued more messed up screw extractions than I can remember. Mainly caused by the drill running of coarse. I would suggest if you do have a go at it yourself try drilling a hole half the diameter of the bolt then tapping a Torx driver into it and unscrewing it. Easiout type extractors tend to tighten the thread in the hole because of their tapered nature. If it were my bike I would disconnect the battery, get the welder out, clamp the earth as close to the bolt as possible, then build up the broken bolt a bit, weld on a bit of scrap. Go for a cup of tea to let it cool down then unscrew it with my fingers. Best of luck.
    VF1200X  XRV750 AFRICA TWIN
    BMW K1 HONDA SH125i
    BMW R80GS BMW R75/6
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  • Offline LAV1000

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    Offline LAV1000

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    Re: Broken/Snapped Engine Mounting Bolt
    Reply #6 on: Jul 12, 2018, 07.57 pm
    Jul 12, 2018, 07.57 pm
    Please do not use an extractor. If the bolt was tight enough for you to break it the extractor will shear and you will not be able to drill it out as it is too hard.
    Get it to someone who knows what they are doing.

  • Offline Hartley   england

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    Offline Hartley

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    Re: Broken/Snapped Engine Mounting Bolt
    Reply #7 on: Jul 12, 2018, 09.49 pm
    Jul 12, 2018, 09.49 pm
     :0461:
    Good advice from last to posts, could very easily become a lot worse and more expensive. Hope you get it sorted soon.


     



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