Head stud bolts


New member
When using head stud bolts is it better to use fine thread or just stick with the coarse thread so its the same as what is threaded into the block? Just wondering on how fine thread torques compared to coarse.
Use what is already in the block, for 2 reasons. One, so you dont mess up the threads and have a likely chance of a headbolt stripping out or breaking loose or something, and another is because the rules call for the threads being same as stock anyways, in most cases. I would only change the size or pitch of the thread if i were going up in size of the headbolt diameter to a bigger stud.