Thread: cracked rocker arm stud boss

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I just got my set of o'l camel hump cast iron heads back from the machine shop today having screw in studs put in and as i was about to set them on the car i saw that one of the rocker arm stud boss's was cracked at where the stud screws in the boss from what appears to me the hole was drilled to small then tapped and caused the metal to crack. The shop was closed when i called up there so i decided to go back home and clean up until tommorow. So i was wonderin if any one would know is a about 1 inch crack from the top of the milled boss down into the head a repairable one. If not what should i do.

Jeez!!!!!!! I just remembered what I told you in the personal messages we exchanged. I hope they don't give you a hard time about this, and no, it won't stand up to any sort of high performance action. I think they owe you a new head.

Well Denny, I suggested that he take them off of the car and take them to a shop. That way, if they screwed them up, they were on the spot , and not him - he had asked me what I thought about him doing them himself, on the car. I'm sorry his head got broken, but am glad he took our collective advice, regardless; at least he has an out, this way.

i have done the srew in studs on lots of heads and you can not crack it with the tap job .why iron is tuff the tap would be broke off in the hole before you could crack it .but if they removed the press in studs they could of crack it taking it out if they took the studs out

i think i know what happened if they took the studs out of the heads .they are press in and if they used a puller on them like bhj type they mite of hit one that had been fixed by drilling and tapping it they make stock type looking ones when they hit that one it would not come out it was tap and was pulling on the stud tower