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Broke cylinder stud while putting on head

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I hope this is the right section as i am new here and couldn't really find a better place to post this.

Well i bought my first dirtbike about two weeks ago. I bought it off of a friend and knew it needed work when i bought it. Its a 1998 cr125r and it needed a new cylinder and piston and rings. I got everything almost put together on it yesterday and while i was putting on the head a broke the stud on the last nut. I was using a torque wrench set to 20lbs when it broke off. I think the wrench might have been broken because on all of the other ones i never heard a click or anything when tightening them. Anyway i got the broken stud out and am going to get a new one tomorrow but i was just wanting to know if there could of been another reason the stud broke. Someone had told me that the wrench i used measured in ft lbs and i need to measure in inch pounds. Thanks for any advice anyone can offer and thanks in advance. Sorry about the long explanation as well.

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20ft lbs of right, if there was no click the wrench was mis-calibrated. In fact i assume that the head is off, so check for it being warped. If it's not then just a new stuff maybe a gasket and use a different wrench

Edited by zotis777

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How would the head look if its warped? Also what do you mean by a direct wrench.

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Get a torque wrench that works.  20 ft-lbs means the same force as a 20 lb weight on the end of a 1 foot long lever.    You can probably apply that much force with the tips of three fingers on the handle of most torque wrenches.  If you snapped a head stud, you probably waaaay over torqued it and all the other studs.

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Alright thanks for the info guys! I just wanna make sure its ft lbs not inch lbs right?

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Right, and to check.if it's warped put it on a piece of glass and try and get a feeler guage under a bunch of places around the head, and that was a typo. I meant different

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Thanks! Im gonna get the new stud tomorrow and try and get it together assuming the head isn't warped when i check it. I am so excited to get this bike running. Again thanks for all your guys help.

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