Today I managed to remove the first two studs from my block with only a moderate amount of grunting. But when the second one came out, I noticed that it appeared to be sheared-off at the end. On further examination, the first one looked sheared-off also. The second shear looked fresh; the first looked like it had been like that for a while. Neither sheared off flush: they both had to be unscrewed from the block once they became loosened.
Both studs have about 5 of the coarse threads remaining (the block end). Both measure a little above 2.5 inches, and I see that the ones Moyer sells are 2.75".
So I have two questions: should I drill out whatever is left, or is 5 threads deep enough to just mount new studs in the existing holes? And if I do drill them out, will I see a cavity down below? I think I read that they extend into the cooling passages, so would I see that?
Fortunately, this is a leisurely rebuild and I'm in no hurry. But any advice on best practices, and best chances for success, would be appreciated.
Pictured below are the studs, including an end-on view of the one that looks like the shear is not fresh.
Both studs have about 5 of the coarse threads remaining (the block end). Both measure a little above 2.5 inches, and I see that the ones Moyer sells are 2.75".
So I have two questions: should I drill out whatever is left, or is 5 threads deep enough to just mount new studs in the existing holes? And if I do drill them out, will I see a cavity down below? I think I read that they extend into the cooling passages, so would I see that?
Fortunately, this is a leisurely rebuild and I'm in no hurry. But any advice on best practices, and best chances for success, would be appreciated.
Pictured below are the studs, including an end-on view of the one that looks like the shear is not fresh.
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