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Broken bolts in cylinder head....help!!

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[JP]:
well....not happy today..while putting the engine back together I broke 2 bolts in the cilinder head....

I was doing it with the torque wrench but without noticing it while I was doing the bolts my hand was turning the thing at the end of the torque wrench, increasing the torque.

So...when I notice it was 2 late..the bolts snapped....what do to now?
Can it be repaired'
do I have to buy that whole part new?
or can I throw everything in the bin?

As you can see it?s the 2 bolts more to the left...this is after I?ve taken all the other parts out again...



I can't believe how I could be so stupid..I do everything with lots of care...and then this happens!!!

I've also found this on ebay...my bike is from 1976, so it's a K6, do you think this will be ok if I buy it?
Or can I repair the broken ones?

http://cgi.ebay.co.uk/Honda-CB-750-F1-SOHC...1QQcmdZViewItem


Thanks for all replys!!!

JP

Post edited by: admin, at: 2005/10/26 11:32[img size=150]

Post edited by: admin, at: 2005/10/26 11:39

SammyB:
DON'T PANIC

It's the studs for the cam towers, right?

First Job get yourself down to Halfords, or some other auto DIY shop and see if you can get a stud extractor. It should remove the studs easily, it works like mole grips, but fits on a socket wrench.

I have a spare head here, don't know what year, but if I can get the studs out cleanly I'll send them to you.

keeps us posted.

:blush: PS. I did the same thing the first time I used a torque  wrench, only I stretched 4 cylinder studs before, and snapped a fifth before I realised what I was doing wrong:P

[JP]:
haaa....

So I can take those studs out of there?!

I tought they were welded in the cylinder head...humm...I'm more happy now than I was yesterday...pfffff....

I'm going to try to take them out tonight when I get home...

So..it means that it has 2 threads?one that goes into the cylinder head and the other one where the nut goes on top?


sorry for my english I hope you can understand it....

cheers,
JP

JonnyHonda:
SammyB is right, they are just studs, here is one I took out earlier, I used two nuts locked together, but I don't think you'll have enough thread.



They shouldn't be that tight, but if you have a problem gently warm the head and use either a stud extractor or a pair of mole grips.



[JP] wrote:

--- Quote ---haaa....

So I can take those studs out of there?!

I tought they were welded in the cylinder head...humm...I'm more happy now than I was yesterday...pfffff....

I'm going to try to take them out tonight when I get home...

So..it means that it has 2 threads?one that goes into the cylinder head and the other one where the nut goes on top?


sorry for my english I hope you can understand it....

cheers,
JP
--- End quote ---

[JP]:
hoo..that's great!

I'm so relief now..I had a lot of work cleaning the valves and being very carefull with everything and this happened...and I tought I would need a new cylinder head...


many thanks for all your help...

Do you mind if I had a link in my webpage to this site?
As this helped me I think more people might find it usefull.

SammyB.... I would be very thankfull if you can send me those studs...if you are near you can come for a cuppa and see the bike!
I'm near Newbury.


Cheers,
JP
aka Pedro

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