Hey everyone,
I’m having a bit of a crisis and would like some advice.
I am in the process of assembling a head I had gotten back after NAPREC did their work. I had the exhaust studs removed prior to sending it to the machine shop, but afterwards when I tried threading in new studs, they wouldn’t go in straight. They would thread in smoothly by hand with almost no effort, but it doesn’t go in straight (noticeably circular motion) and eventually stops about halfway in. I had a couple go in perfectly straight with no effort, but when I removed them to try it again, they no longer when in straight and had the same issue as the others. The studs I’m using are M8x1.25, which I read was the standard. I did some research and decided to buy a chaser kit and new studs IEE NZ just in case. Has anyone experienced this? How screwed am I? Do I just need to run a chaser or tap and try again? Prefer a chaser because I heard taps can destroy existing threads.
Note: I also have a new set of intake studs that went straight in just fine that I bought from IEE NZ. I bought the exhaust studs from the U.S.