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Helicoils
#1
Surprise surprise the Canyon Nerve XC is in pieces again! Overtightened one of the seatstay bolts a couple of months ago and pulled the helicoil through a millimetre. Bolt thread damaged upon removal this week  :B Bearing shot....

Question: Are specialist tools needed to remove old helicoil and insert new helicoil?

Or should I just send the seatstay off to Canyon and get them to do it for me?

Thanks as always!
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#2
"sirromj" Wrote:Surprise surprise the Canyon Nerve XC is in pieces again! Overtightened one of the seatstay bolts a couple of months ago and pulled the helicoil through a millimetre. Bolt thread damaged upon removal this week  :B Bearing shot....

Question: Are specialist tools needed to remove old helicoil and insert new helicoil?

Or should I just send the seatstay off to Canyon and get them to do it for me?

Thanks as always!

i'll be selling my old Canyon frame very soon, just saying!  Wink
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#3
James,are you sure that this is a helicoil?A helicoil is a repair to a damaged thread,not something that has been fitted from new.A helicoil is really a coil of wire,which becomes the "new"thread.You can remove them relatively easily by pulling or prising out the wire.I would think that this is really some kind of thread insert,this is much harder to replace without specialist tools.
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#4
Like Mr Flintlock said..... that's not a helicoil matey & it should be tight in the seatstay.
How old is the frame?

If the threaded inserts move I'd be looking at warrenty replacement.
The reason Cayon have used the insert is they appreciate the ali used for the seat stay isn't up to the job of withstanding the torque required on the bolt.  So they've bonded in a steel (or maybe harder ali) thread.
If you've pulled the insert from the frame somethings wrong.  Ignoring the fact there shouldn't be 1mm clearance there, the insert should spin in the frame before it pulls out.

Easy to decide...... a helicoil will be a spiral of wire..... an insert will look like a metal tube with a thread inside.
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#5
Yeah, according to this that's what they are: M6xP1.0x1D, top left.
<!-- m --><a class="postlink" href="http://www.canyon.com/downloads/supportcenter/nerve_xc_11.pdf">http://www.canyon.com/downloads/support ... _xc_11.pdf</a><!-- m -->
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#6
Just over 2 years.  Here's a piccie.


Attached Files Thumbnail(s)
Less than 1 minute ago" />   
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#7
Can't get the link to work, but I'll be the lovechild of Mary Poppins & one of Burt's dancing penguins if it's not an insert.....

Well I'l go to the foot of our stairs....
A helicoil fitted to an ali thread in a new bike...... no wonder they're cheap!

The good news is that looking at your piccie, you might get awat with it.
It looks like only the first coil has stretched.
Provided you can get tge bolt in & it tightens you should be OK.

In the meantime I'll be off to find my carpet bag & practice my penguin dancing....
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#8
Well it seems your right,Helicoil do inserts for production use,have been on there website.Not a fan of helicoils because of this happening.Spent many hours over the years repairing helicoils.Its poss to repair this with an M6 tap,are you riding Sunday?If you are bring this with you and I will bring taps.
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#9
Thanks for the offer Geoff. I'm not sure about it sounds a good idea having less thread for the bolt to screw into. Here's a better pic showing how much it's been pulled through compared to the good one:

resim
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#10
My experience with Canyon (through email): trying to get information out of them (you know, silly little things like how much I have actually just paid for a pair of bolts, confirmation of the address they have for me on their system) is like trying to get blood out a stone  >Sad
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